Category Archives: Blog

Woman regulating heating temperature with a modern wireless thermostat; solenoid valves creating modern homes

Top 13 Ways Solenoids are Creating the Modern Home

January 6, 2021

A solenoid is a mechanical device that converts electric energy into mechanical energy. It consists of a coil, a housing, and a moveable device called an armature or a piston. When the device is switched on, magnetic fields activate the coil enabling it to draw in the armature. When power flows through the coil, it induces a strong flux that pulls the piston. The use of electromagnets allows the device to be switched on and off. Electromagnetic solenoids are ideal for making automatic valves and switches. Solenoids have many modern home applications ranging from washing machines to dryers, stoves, and air purifiers.

Solenoid Starters

Electric solenoids are used for automobile ignition systems in motorable machines such as mowers. The starter solenoid functions as a relax that initiates contact to close the circuit. The starter solenoid gets an electric current during ignition. The magnetic field pulls the contacts and closes the circuit between the starter motor and the battery. Starter solenoids remain idle most of the time because an internal combustion system powers the engine.

Chime Door Bells

Solenoids are used in doorbells. In this case, the solenoid is activated by an electric current once the doorbell is pushed. The current pushes the piston to strike the tone bar. It is this strike that produces the audible chime, otherwise known as the knock.

Door Locks

Solenoids are used in automatic locking systems found in modern door locks. When the door is locked, the solenoid is static and does not consume power. However, the unlocking mechanism induces the coil with electrical energy that pulls the piston to unlock the door.


Solenoids are a component of the joystick controls used on gaming devices that simulate driving. Most gaming devices use latching solenoids, which hold the controls in place without needing a power source. The piston remains in a latched position relying on a specific holding force. Power is required to release the piston. Latching solenoids use DC power and are more efficient than other solenoids that require a constant power source.

Automatic Sprinklers

Solenoid valves are used in irrigation equipment, such as the automatic sprinklers used to water lawns and gardens. The solenoid valve controls the flow of water and can be set to operate autonomously.

HVAC Systems

Solenoid valves regulate the flow of hot water used in the showers, kitchen faucets, and several other installations at home. They close and open automatically to regulate the flow of hot and cold water. Most HVAC systems use pilot operated solenoid valves because they have a high flow rate.


Solenoid valves are used in most modern refrigeration systems. The valve opens and closes to regulate the passage of the refrigerant. Solenoids are also used in the compressor system of refrigerators. Typically, there is an electric motor that runs the compressor. The compressor takes in purified air, then compresses it, and sends it to the fridge. The compressor is powered by a solenoid valve which closes the circuit to keep the air under pressure. When the tank achieves the desired pressure reading, the pressure switch stops the power supply. This allows the solenoid valve to open and release excessive air.

Another common use of solenoids in refrigerators are for ice selection or ice diverting. A solenoid actuates a gate that allows your ice to pass through and out of the dispenser.

Automated Ironing Machines

Automated ironing machines use steam to iron clothes. The iron has a push button that controls the flow of steam on the clothes when pressed. A solenoid valve regulates the flow of steam to the iron when the user presses the control button. This valve allows the user to regulate the amount of steam that reaches the garment when ironing.

Solenoids in Dryers

Modern dryers have an air exchanger where incoming compressed air is cooled and dried by compressed air from the evaporator. The Freon then cools the freshly compressed air to the dew point. All these processes happen in the evaporator. The condensate resulting from the cooling process is isolated and disposed. The air-to-air heat exchanger then heats the newly compressed air before allowing it out of the system. The solenoid valve in the dryer regulates the evaporator’s temperature by preventing it from going too low and freezing the condensate.

Floor Cleaning Machines

Household cleaning machines have a rotating brush that rubs on the floor to remove dirt. The appliance contains water and a cleaning detergent. When the user presses a button, the machine releases a mixture of water and detergent. A solenoid valve regulates the flow of water and detergent from the dryer tank to the brush. The system is very efficient because the valve operates at very low pressure.

Thermo Electric Heaters

Thermoelectric heaters work by generating heat that warms the whole house through radiators located in different rooms. They also produce water for sanitary functions. You can also use them for baking or roasting food. The system generates heat by burning wood or gas to heat water for warming the house. They contain two solenoid valves connected to a hydraulic system. The first valve allows cold water into the circuit, where the thermoelectric heater heats it. The second valve regulates water flow and distributes it to different sanitary portals, such as the kitchen and the bathrooms.

Magnetic Circuit Breakers

Circuit breakers regulate the flow of power in your home to reduce the risk of electric fires. Most modern circuit breakers use solenoid valves instead of fuses to prevent power overloads. When there is a power overload, the circuit breaker induces a mechanism that causes the solenoid to pull the piston, which disconnects the circuit.

If you are looking for a solenoid manufacturer who offers cutting edge technologies, Johnson Electric will make customized solenoids for you. Contact us for further consultations about your solenoid needs.

Open Frame Solenoids

Demystifying Open Frame Linear DC Solenoids

November 3, 2020

Comparing and contrasting open frame linear DC solenoids with other types of solenoids

Linear solenoids are an intricate part of our everyday life. They are used in locks, cars, vending machines, and most of the equipment and appliances we use daily.

There are several types of linear solenoids in the market, these include tubular solenoids, latch solenoids, and open frame linear solenoids.

Each is designed to better deliver on the needs and functions of different applications.

Open frame varieties are the least understood of the group and, in most cases, are confused with tubular solenoids, while they are a very different type of product.

Let’s have a closer look at open frame linear DC solenoids, their components, how they work, and how to realize their benefits.

What are Open Frame Linear DC Solenoids?

Open frame solenoids have the most straightforward design among the different types of linear solenoids. They are defined as a solenoid with a mechanically unprotected, visible, over-molded, or taped coil with a movable plunger at the center of the coil.

Because of their unique build, open frames are lightweight and more cost-effective than other types of linear solenoids.

Like most other linear solenoids, open frames generate force in a single direction, which can be a pull or a push when energized.

How are Open Frame Linear Solenoids Different from Tubular Solenoids?

It is best to compare solenoids based on the critical features you should consider when choosing a solenoid. This requires a clear understanding of the differences between the three types of solenoids.


One of the differences is the structure. Only tubular solenoids have an enclosed design with the coil safely tucked away inside a metal casing. Open frames have the coil exposed on at least two sides. Magnetic latch solenoids can have the tubular or open frame design.

The general shape of both the latch and open frames is generally the same. Across the variations within these solenoid categories the shape and dimensions between the two can vary slightly.


All tubular, open frame, and magnetic latch solenoids come in push and pull varieties. In both tubular and open frames, the center plunger is movable without current and has a flexible duty cycle that can be continuous or intermittent depending on the requirements of the applications. In latch solenoids, the plunger is held in place by a permanent magnet, with no chance of a continuous cycle.

Stroke and holding force

Latch and open frame solenoids have very similar statistics in terms of holding force and stroke length. However, unlike open frames, magnetic latch solenoids do not require current in the end position.

Life expectancy

Open frame solenoids are typically benchmarked at 50 to 100 thousand cycles, while tubular varieties are more durable with a life expectancy of above 25 million cycles.

The above comparisons are meant to highlight the differences in how the various options will be optimized for the best performance given the operating environment and application.

Applications of Open Frame Linear Solenoids

Open frame solenoids have a vast range of applications in across different industries. Some of the most common applications include:

  • Vending machines
  • Residential and commercial locks
  • Card key locks (smart locks)
  • ATM machines
  • Battery operated locks
  • Cash drawer machines
  • Medical supply cabinets
  • Gaming machines

Matching the right part to the proper application is critical in ensuring the best performance and operation. At Johnson Electric, we have an expansive line of open frame linear DC solenoids in different sizes, force, and stroke options to best fit your applications. Contact us today and let us help you find the solenoid solution for your needs.

Porch Pirates during the pandemic; illustration of a pirate composed of cardboard box packages

Porch Pirates and the Pandemic

October 7, 2020

Following on from our previous article on porch pirates, we look at combatting a growing trend fueled by the problems of our modern world

A Follow-Up

With the current state of the world, such as social distancing and sheltering-in-place, e-commerce is more relevant than ever.

With the influx of online orders, big brands like Amazon and Walmart are stretching their logistical networks to the extreme to fill a demand typically forecasted during the holiday season.

Of course, with the increase in home deliveries, thieves are taking advantage of the situation to plunder more packages. In fact, in a span of 90 days, porch pirates have stolen packages from 25 million households, according to research conducted from May 17 – May 23, 2020 by

As a response to this growing trend, state legislators have begun to place more focus on the growing crime rate of package theft.

In one example, Michigan increased fines and jail time for repeat offenders. In another, Tennessee legislators are working to pass a bill, making porch pirating a felony and punishable up to 12 years in prison.

Being Proactive

What can you do to prevent your packages from being stolen? Staying proactive with deliveries will reduce the likelihood of your next package being swiped before you get home.

Change your habits

Thieves are wising up when it comes to their sneaky craft. In fact, they are known to track delivery drivers as they make their rounds, then swipe the package minutes after it’s dropped.

When you place an order, it’s always best to be at home to receive the delivery. Otherwise, have a neighbor sign for the package; or leave specific instructions on where to place the package if you are not home. The back porch, storage shed, or other obscure locations will further deter prying eyes.

Create visual obstructions

Out of sight, out of mind. Create a visual obstruction from the road or sidewalk, like a large potted plant, decoration, or outdoor furniture.

Leave specific instructions for the delivery driver to place the packages around or behind them. It’s a quick and unassuming way to protect important packages.

Invest in new technology

With technology becoming more ubiquitous than ever, there are several ways to invest in technology.

  1. Install security cameras to deter potential thieves.

    Many options on the market feature home network connections and a live stream of the camera’s footage that can be viewed from a mobile device. One of the most popular items is the doorbell camera. This simple security measure doesn’t require wiring and is easy to install.

    Alternatively, dummy cameras make great scarecrows for porch pirates. If a camera is visible from the road or sidewalk, thieves are less likely to approach.

  2. Sign up for text or email alerts.

    Informed Delivery, service provided by the USPS, allows residential customers to sign up for email alerts to notify the homeowner on the mail items and packages to be delivered that day.

    Major online retailers also send out updates whenever a package is in transit and has been delivered, which is advantageous when scheduling deliveries.

  3. Invest in a mailbox with a smart locking system.

    A conventional delivery lock box is secured with a code only known to the homeowner and delivery person. When the delivery arrives, the package is placed inside the lock box and locked. Lock boxes are excellent methods to protect items from thieves and weather elements.

How Johnson Electric Plays a Role

b7 solenoid; porch pirates articleAs a leading provider of motion solutions, Johnson Electric has technology capable of supplying a solenoid to fit any locking system. Our new B7 solenoid can be a quick drop-in replacement without the need for added tools to install. Also, with its forward-thrusting nail head plunger design, it can eliminate the need for extra attachment hardware.

For more information, please visit us at

Smart industry robot arms for digital factory production technology; manufacturing trends 2020

Manufacturing Trends of 2020

September 2, 2020

There is a feeling of uncertainty in the manufacturing world right now. Both the intermediate and long-term future of the sector will revolve around one thing: the manufacturing trends happening in 2020. With that in mind, manufacturers need to pinpoint the kind of developments to look forward to this year.

Manufacturers we work with share that enhancing their operational efficiency is most critical during this time.

We look at the top manufacturing trends to keep track of in 2020. We will also cover expected challenges, and how you can run your manufacturing business in the most agile way possible.

Top Manufacturing Trends, 2020 and Beyond

1. Smart Manufacturing & 5G

2020 is the year that we are likely to see the full rollout of the Fourth Industrial Revolution. 5G technology is going to happen on a much larger scale and will have a substantial impact on Smart Technology. Manufacturers will be able to boost speeds and reduce latency in massive proportions allowing their technologies to interact in real-time.

Smart factories are becoming popular in the manufacturing field. They depend on connected devices to support technologies such as automation and artificial intelligence. Typically, intelligent gadgets are also capable of sensing the environment. As specialized factories continue to emerge, manufacturers must be able to adapt the networks that interconnect them effectively.

Based on a recent article from AT&T, 5G provides manufacturers with an opportunity to create regular streams of income. The industry will also benefit from cost-effective energy and utility. As pinpointed in a study by Ericsson, “the projected market value in 2026 will be $113 Billion”. That alone depicts an impressive 7% revenue growth from the current figures.

2. Machine Learning & AI

Manufacturing is quite a complex industry. Changes take a lot of time to incorporate. However, the use of analytics, AI, and machine learning will reach new heights in the coming months.

These technologies are sure to improve manufacturing efficiency and raise revenues. The more complexities your firm faces, the higher the chances to use machine learning and AI technologies to get that competitive advantage you need to be on top.

Manufacturers can also implement such technologies to improve performance in other areas of the business. Whether it is in your customer relations, on your factory floor, or in the supply chain department, they will come in handy.

3. Wearable Technology

The sharp rise in the use of IoT (Internet of Things) has paved the way for wearable technology. Manufacturing firms of all sizes and types are exploring- and investing in- wearable gadgets with sensors that can help their workforce optimize production.

Features present in wearable devices enable manufacturers to monitor and raise workplace productivity, efficiency, and safety. Employers will also collect valuable information, offer customized experiences, and track all production stages seamlessly. Headsets with heads-up displays, smartwatches, and other wearables will provide essential data more quickly than ever.

4. Cybersecurity

Cybersecurity is a big concern for every sector, and manufacturing is no different. Connected devices will inevitably become the norm. And with this, vulnerability to cyber infiltration will grow.

As this manufacturing trend takes shape, manufacturers must be aware of cyber risks. They should streamline their processes to fit the requirements of today and the future.

5. AR & VR

The twin concepts of Augmented Reality and Virtual Reality are finally beginning to make imprints in the world of manufacturing. They are likely to impact the areas of machine maintenance and user training in several ways, including:

Remote support- Augmented Reality will enable maintenance personnel to carry out tasks from a remote location. As a result, firms will make strides towards bridging the skills gaps and boost overall efficiency.

“Hands-On” Training- Both employee training and testing can take place in a VR environment, thus yielding a low-risk process.

6. Greater Focus on Customer Service

Customer support has always been a top priority for most manufacturers. But with the consistent integration of technology, it is set to become even more crucial. As manufacturing tools of industry 4.0 become a standard feature, customers will have direct visibility into the manufacturing process. In the long run, there will be a concerted push for customer quality.

Manufacturing Challenges for 2020

As the new decade kicks in, manufacturers are already anticipating their fair share of challenges. One thing is for sure; industry 4.0 is here and evolving swiftly. While new technologies continue to unlock hidden value in multiple production processes, hurdles along the way are inevitable.

Here’s our pick for the top challenges manufacturers are likely to face.

  • Labor Shortage/Skills Gap

Deloitte estimates that nearly 4.6 million jobs will become available in this decade because of changing skillsets and retiring ‘baby boomers.’ Close to 2.6 million of those jobs, however, will remain vacant as the gap between job opportunities and the number of capable workers widens.

Even in the era of robotics and service automation, skilled employees are still crucial for their problem-solving knowledge, moreover, they can perform analytics and occupy managerial slots. To bridge the broadening skills gap, manufacturers will have to creatively train existing employees to cultivate a well-rounded workforce.

  • Ever-dynamic Technology

From cloud computing to robotics, the challenge for many manufacturers is to keep up with the frightening pace of technological growth. Often, there is a gap between understanding the need for device acquisition and the actual implementation. According to a recent Forbes study, 90% of firms understand the vital role that technology plays, yet only 40% feel that they are offering the best tools for success.

  • Supply Chain Collaboration

In the coming months, supply chain complexities will continue to trouble manufacturers and other stakeholders by creating persistent technical hitches and customer complaints. Human nature will once again become a top issue. There will be a lack of trust among key players, which will frustrate technology deployments and collaboration efforts even more. While experts continue to explore the reasons behind mistrust throughout the supply cycle, issues of pricing, data monetization, and data ownership will reign supreme.

Johnson Electric can help you achieve business agility in manufacturing through our top-of-the-line solenoid solutions. On the back of our core values, we endeavor to make our customers successful by providing reliable motion systems. You can expect the highest level of quality and performance. Whether you need microelectronics, relays, pumps, valves, or any other product in this specification, don’t hesitate to contact us today.

wearable medical device - insulin pump

Case Study: Wearable Medical Devices

August 5, 2020

Wearable Medical Devices – Explaining When to use Printed Circuits

Johnson Medtech developed a process to allow surface mount components to be applied to the polyester substrate to create a waterproof circuit, which resulted in an extremely thin and conformable product.

When making a medical wearable with a large surface area, printed circuits are the natural choice for three reasons:

  1. The ability to print instructional graphics on the surface gives it the impression of it being a finished medical product without extensive coverings.
  2. Printed circuits are an additive process, where silver ink is applied to the polyester substrate. The subtractive process of a copper flex circuit is extremely harsh on the environment; you end up etching off a lot of expensive copper.
  3. Printed electronic substrates are ten times more cost-effective than the cost of the copper foil that is etched away.

Considering all of this, it is not surprising that most medical companies will first try to use a printed electronic circuit; however, there are limitations:

  1. The resistance of the ink is about ten times stronger than copper. Therefore, they are not very useful for high power circuits. However, most wearables are made to house a sensor and are battery operated; it is unusual to have high current coursing through the system.
  2. The polyester substrate cannot usually withstand more than 160°C; therefore, typical reflow solder is out of the question.

Recently, a customer requested a completely waterproof, high-volume wearable circuit, and Johnson Medtech was ready to accept the challenge.

Because of the advantage of the SIP, we were able to place several circuits on one panel. Then, we applied the dielectric coating and encapsulant over the conductive pads, resulting in a completely waterproof, lightweight, and easily conformable product, along with a happy customer.

Vital Signs Wearable – Challenges with Electrodes

Wearable medical devices are becoming increasingly popular, even assisting the public in monitoring their health status and fitness level. Electrocardiograms (ECGs) are among the most common diagnostic tools in healthcare; these provide real-time data on the performance and function of the heart and other vital signs.

The revolution of wearable technology provides the necessary data to clinicians for more reliable diagnoses and to make informed decisions on treatment.

Through the continuous addition of technology, many of our customers were unsatisfied with bulky results and crucial challenges in functionality.

Johnson Medtech accepted the challenge to assist customers in manufacturing thinner and more conformable wearable patches, increasing the functionality of the most current technologies available.

The two main challenges were presented with the development of ECG electrodes:

  1. Electrodes must be defibrillation proof.

Whether a single- or multi-use product, electrodes must not interfere with the defibrillation energy; nor may they prevent the doctor from shocking the patient. Since that amount of energy is generally large, the resistors used to limit this energy are also large, resulting in bulky devices and reduced functionality.

Ideally, the resistors would be situated adjacent to the electrodes, which are then attached to the skin.

If not, the creepage and clearance must be maintained throughout the circuit until the resistor is in place. Again, this causes devices to be bulkier in design.

  1. Mounting the battery to the substrate of the electrode created a bulky and less conformable product.

Because of the concern of size, weight, and bulk, many previous solutions with battery mounts made the wearable medical device less conformable and thicker.

Johnson Electric considered attaching a battery holder to the device; but because lithium-ion batteries have a temperature threshold, this solution did not work. Additionally, the size and weight of the device were still too large.

To combat both of these challenges, Johnson Medtech created special conductive adhesives; these allowed mounting the batteries to the substrate at a temperature that did not damage the cells.

Additionally, Medtech engineers developed the ability to screen print a carbon resistor next to the electrode, allowing a sleek and compact sensor.

Optimizing Performance and Cost of Surgical Handles and Devices

As more surgical handles and wearable medical devices become single-use, it’s incredibly important to be able to control the costs.

Even though Johnson Electric has a proven history of producing cost-effective drive systems, optimizing cost is not done just by assembling inexpensive components, but by maximizing the performance of the product.

Recently, we had the opportunity to provide the motor gearbox along with the circuitry and software to control the device.

This provided us with the opportunity to integrate smart features into the device. During development, an essential smart feature is an ability for a device to be able to measure its own performance.

The data was provided to the engineering team, enabling them to understand the limits of the device and the balance between the mechanical weak points and the limits of the electromechanical performance.

Providing these smart features allowed optimization of the product that was not possible through testing the products with external test equipment. Also, the smart features can be integrated for production units as well for troubleshooting, and further device optimization.

Medication Delivery Wearable

Johnson Medtech has a deep background in providing drive systems for biologic dosing devices. As these devices move toward single-use wearables, cost and quality assurance have become a significant consideration for our customers and their patients.

Consider how in the automotive industry, the fit, form, and finish of a car provides that sense of high quality or luxury. The same could be said for the motor tone of a medical device.

Through countless development cycles and data analysis, our engineers perfected a quality motor tone using unique gear profiles and precise distance tolerances.

Because of our finite element analysis capabilities, our team presented quality assurance data in weeks instead of months; this proved the products and materials used during the manufacturing process are safe, even in the most challenging circumstances.

With these capabilities, we can provide compelling cost advantages through automation, efficiency, and innovative design.

For more information, please contact us.

Intensive Care Emergency Room With Artificial Lung Ventilation Monitor; Medical Devices and Diagnostic Equipment

Why Solenoids are Used in Medical Devices and Diagnostic Equipment

June 24, 2020

From securing hotel room locks to controlling airflow in medical devices, solenoids are found in almost every product we use daily. As technology evolved over the years, medical devices designed with solenoids became increasingly popular. Without this crucial design element, the functionality of medical and diagnostic equipment would be haphazard at best.

Below is a look at the factors driving the increase in these products and the key factors for device manufacturers to keep in mind when designing lifesaving equipment.

Lifesaving medical devices featuring solenoids

Many of the critical lifesaving devices used to diagnose and treat patients include solenoids in their design. They are essential devices found in most hospital intensive care units.

Here are a few examples of medical devices manufactured with solenoids:

  • Ventilators
  • Fluid Analyzers
  • Dialysis Machines
  • Centrifuges
  • Spine Adjusters
  • Tissue Punctures

Additionally, solenoids are also used within larger imaging devices, such as MRI machines.

Why do medical device manufacturers use solenoids?

Hospitals and medical centers are under growing pressure to keep up with the latest technology while remaining within budget. With their durable design, efficient operation, and affordable price tag, solenoid devices are an attractive option to help hospitals achieve both goals.

As automation-hungry healthcare organizations fill their diagnostic areas and intensive care units with solenoid-driven medical equipment, manufacturers are following suit.

Because solenoids are incredibly reliable, medical device manufacturers find that the number of device failures is minimized. As proven repeatedly, using a solenoid is the simplest way to implement quick, linear motion with a substantial amount of force over a small distance.

Why choose Johnson Electric?

Since 1959, Johnson Electric has provided a wide range of customized solenoids ranging from soft shift linear DC solenoids for medical fluid analyzers to smaller open frame linear solenoids for blood pressure monitors.

Our premium range of motion solenoids includes the following:

Contact Johnson Medtech to discover why medical device manufacturers across the globe turn to us for the highest quality solenoids. Whether you specialize in ventilators, patient monitors, or another type of diagnostic equipment, we have an extensive array of solenoids to fit your application. We look forward to becoming your long-term solenoid provider!

Image Of Medical Ventilator. Hospital Respiratory Ventilation. Medical equipment

Overview of DME’s (Durable Medical Equipment) and Treatment Equipment

June 19, 2020

Electromechanical solutions are revolutionizing emergency healthcare these days, which is especially relevant given the current crisis. Here’s some information about electromechanical medical equipment, including a few ways that Johnson Electric’s solutions are making a huge difference.

What is DME? The ‘”DME” term refers to any kind of equipment that can be used to increase health or quality of life. This term is relevant to insurance such as Medicare, since insurance may pay for an electromechanical item that can help with care, including insulin pumps, for example.

The term is most often used to describe equipment that is needed regularly to preserve life. The “durable” part refers to how the machine needs to be able to handle use daily without breaking down. So, in the case of a ventilator, which is highly relevant for the current COVID-19 crisis, it needs to be durable enough to continually provide oxygen directly into a patient over a long period of time without suffering any kind of failure over a significant duration.

These terms have some overlap, however. Both refer to similar pieces of equipment such as infusion pumps, oxygen concentrators, and nebulizers.

Examples of Relevant Medical Equipment and How They Transform Healthcare

Infusion Pumps

Infusion pumps deliver fluids directly to a patient’s body, this could include nutrients and medications, for example. These electromechanical devices are crucial to health care because they offer a lot of control regarding the rate and duration of infusion, making it so that they work in a large variety of situations based on the type of pump.

Insulin Pumps

Insulin pumps are another type of device that has revolutionized the way people live. Diabetes used to be a much more difficult condition to live with than it is now. These pumps allow patients to keep their blood sugar within the safe range. Staying in this range means that patients feel better, but it also helps them avoid long-term complications which can severely reduce their quality of life, such as heart disease, kidney failure, or even something like blindness. The equipment makes use of a computer chip to deliver the insulin when it’s needed.


Nebulizers are pieces of medical equipment which allow professionals to deliver medication right into someone’s lungs. It uses liquid medicine to create a fine mist that someone can then inhale through a mouthpiece of a face mask. Again, these are critical for COVID-19 patients since this malady involves an infection of the lung, which is precisely where medicine needs to be delivered. These devices save many people’s lives during crises like this one.


Ventilators, also known as oxygen concentrators, move oxygen into a patient’s lungs when they aren’t able to breathe by themselves. Generally, modern ventilators use a computer chip as well, to deliver oxygen when a patient isn’t breathing on their own. Instead, the lungs are inflated by this machine at the proper rate. These machines are the sole reason why COVID hasn’t been much worse than it has.

They are so critical to survival during maladies which affect the lungs that there is currently a massive shortage of them in many areas across the world, including, at various times through this crisis, New York City.

Medication Delivery Equipment

This designation is also going to overlap a bit with other terms, because it refers to equipment which can deliver medication to the body through different means, including through the mouth, under the skin, intravenously, through the inhalation of vaporized liquid, and other means as well.

At Johnson Medtech, we have several different pieces of medical equipment that help with this. In particular, we have auto-injectors that are part of an overall auto-injector system where medication can be delivered automatically. In fact, our auto-injector systems can be completely customized according to whatever the relevant specifications may be.

We also make pumps and valves for inhalation systems, as well as needle insertion and retraction systems.

Getting Started

Given the durability, flexibility, and powerful life-saving abilities of these types of emergency medical equipment, it’s of particular importance that you find a company that makes the highest quality for each.

For more information about how Johnson Medtech can help you with your emergency medical equipment needs today, please don’t hesitate to go ahead and contact us now. The faster you contact us, the faster we can help you.

White Smart Lockers With Electric Security Code Locks On The Door

Overview of Smart Lockers

June 10, 2020

Modern retail spaces and work environments are becoming increasingly dependent on smart technologies to help them stay organized and operate efficiently. One such innovation is the implementation of intelligent locker systems for the secure and convenient storage of packages and personal items. Solenoid locks are an essential element of many smart locker solutions as they allow for the electronically-controlled locking and unlocking of doors. Here, we will discuss the many benefits associated with upgrading from traditional lockers to smart lockers.

The Limitations of Conventional Lockers

While smart locks are a relatively recent technology, most people are familiar with the various forms of traditional locks. These locks are fairly straightforward in design and require manual engagement to activate or disengage the locking mechanism. Operating these locks typically involves turning a key or merely pressing a button.

Conventional lockers rely on traditional locking mechanisms, typically in the form of combination locks, padlocks, or keys. These storage solutions are often attractive due to their relatively low upfront costs when compared with smart lockers. However, they lack many of the benefits that come with more technologically-advanced options and might actually become a more expensive investment in the long run.

Some of the main drawbacks of conventional locker systems include:

  • Hidden costs: Despite their relatively low initial investment, conventional lockers often become costly in the long run due to management and maintenance costs. For example, locker keys are frequently lost by the user, and the key or lock replacement process is time-consuming and expensive. Keys also susceptible to damage from wear and tear, which can render them nonfunctional over time.
  • Security issues: The traditional locking mechanisms used with conventional lockers come with security concerns. Mechanical locks are vulnerable to being shimmed, cut, or picked, and keys can easily be stolen or copied.
  • Inconvenience: Conventional lockers require users to keep track of a key or remember a combination, making them less user-friendly than more advanced locker technologies.

Enhancing Security and Convenience with Smart Lockers

In contrast to conventional lockers, smart lockers employ locking mechanisms that can be engaged electronically or remotely rather than manually. The electronically-controlled locks on smart lockers are engineered to lock or unlock upon receiving instructions from a keycard, barcode, or device such as a smartphone. One example of an electronic lock used in smart lockers is a solenoid lock, which relies on electromagnetism to perform the locking/unlocking function.

Smart locker systems offer the following advantages:

  • Improved security: Because access is digitally controlled, smart lockers eliminate the risk of keys being stolen or locks being picked. They can also be programmed to send alerts that enable the user to track entry into the storage space.
  • Long-term cost savings: Although smart lockers are initially more expensive than traditional storage solutions, they are worth the investment in the long run. For example, smart lockers eliminate the constant need for expensive key or lock replacements. They also tend to require less maintenance overall, which helps to reduce overhead expenses.
  • Ease of use: Smart locker access can be as simple as scanning a barcode, swiping a keycard, or sending a message from a smartphone. As an added bonus, this means that there are no physical keys to keep track of.

Smart Lockers for Retail BOPIS Services

In the retail environment, smart lockers provide countless benefits for both customers and retailers by automating the package notification and distribution process involved with “buy online, pickup in store” (BOPIS) services. After a package is delivered to a smart locker, the consumer receives an automatic notification of package availability along with access instructions. The consumer can then retrieve the item at their own convenience by simply scanning or entering the provided access code. In addition to increased convenience, the use of in-store smart lockers for package delivery also offers an element of security for the consumer. As doorstep package theft becomes more prevalent, smart lockers are viewed as a more secure way to have items delivered.

As BOPIS services continue to expand in popularity, the ability to use self-service smart lockers becomes increasingly important to the retailer as well. Smart locker systems streamline delivery logistics and also provide valuable real-time analytics regarding the final stages of order fulfillment. Furthermore, since smart lockers are self-service, less staffing and planning are required to facilitate store pickup. This reduces operating expenses for the retailer and makes the overall BOPIS experience much more efficient and convenient.

Smart Lockers in Workplace Environments

In offices and other workplace environments, managing traditional locker systems can be a significant challenge for administrators. Smart locker systems simplify the management process by allowing locker access in the form of electronic “keys”, eliminating the hassles associated with physical key maintenance and replacement. Having a secure, easy-to-manage locker system also provides a sense of comfort to the employee as they can be assured that any security issues will be quickly resolved.

The digital management enabled by smart lockers also provides employers with easy-to-access information showing which lockers are in use, how frequently they are used, and who is using them. An administrator can use this information to remotely assign and manage lockers among employees. This simplified allocation strategy is especially important for companies with frequent staffing changes.

High-Quality Motion Solenoids at Johnson Electric

The enhanced security and efficiency provided by electronically-controlled smart locker solutions make them well worth their initial investment. Solenoid-driven smart lockers, in particular, are revolutionizing the way secured storage units are managed in both retail and workspaces. In the retail world, the convenience of smart locker systems benefits both the vendor and the consumer by simplifying the in-store pickup process. In the workplace, they simplify office management and provide a safe, secure place for employees to store their belongings.

At Johnson Electric, we supply a wide range of rotary and linear solenoids for use in smart lockers as well as custom locking assemblies to fit your specifications. With our diverse portfolio of unique, high-quality solenoid options, our engineering team can work with you to find the perfect solution for your specific application. To learn more about our standard and custom-engineered solenoid solutions for smart lockers and other high-precision applications, please contact us today.

Remote Diagnostics/Telemedicine. Doctor With A Stethoscope On The Computer

The Push for Remote Diagnostics

May 18, 2020

The Public Need for Remote Healthcare

Before the most recent concern of highly contagious diseases, healthcare and technology providers recognized the need for remote diagnostics.

With the extenuating circumstances of the most recent outbreak, there is an even bigger demand for at-home healthcare and screening in attempt to limit in-person interactions between patients, doctors, and staff members.

Remote diagnostics, or at-home screening, allows doctors to monitor the patients’ temperature, heartbeat, ECG, blood pressure, and more from a remote location.

The same technology could also be useful to patients who are immobile, have difficulty traveling, and live in rural areas.

Additionally, this technology would free up necessary medical supplies, like hospital beds for critical patients, personal protective equipment (PPE), as well as reduce hospital bills for patients.

Remote Diagnostics

The Tech that Makes It Happen

Advancing technology has miniaturized even the most elaborate of machinery that wasn’t thought possible before.

Recently, a company in India developed an extremely accurate ECG instrument that is the size of a keychain. This provides a viable alternative to buying a large and costly machine that isn’t needed.

Entities like Care Hub are already pushing to release kits to those who are self-isolating or can’t go into the doctor’s office. These kits come with all the technology necessary for at home monitoring.

Many hospital networks are now pushing Telehealth visits, virtual video chat appointments with patients and doctors, versus in person screenings that increase risk for doctors and other patients.

Other companies like Masimo are creating single use monitoring devices that connect to an app which guides patients through a series of questions regarding their symptoms. These devices are sent out in a multi-day supply. After completion, the results are sent to clinicians to help coordinate the patient’s needs.

Remote Diagnostics

Where Johnson Medtech Comes In

Johnson Medtech creates custom printed circuits that are used in single use vital sign monitoring devices.

Our technology has been adapted to be waterproof, extremely thin, and comfortable to wear. With a global footprint we have the economy of scale for any order and can deliver it using our logistic network.

For more information please contact us.

Red Semi Truck; solenoids in semi trucks

Your Guide to Solenoids in Semi-Trucks

May 15, 2020

Even though solenoids are found in many household items such as washing machines, dishwashers, doorbells, sprinkler systems, they are most known for the roles they play in allowing automobiles to run smoothly. Many car enthusiasts know of all the different solenoids found in cars and trucks, but how about in semi-trucks? Semis are much larger than standard vehicles and therefore house a greater number of solenoids than traditional vehicles.

It takes many components to make trucks operate properly, decrease emissions, and increase efficiency. Solenoids are an important component of semis. Let’s take a different look at the different kinds of solenoids and their functions.

The Purpose of Solenoids

Solenoids are a simple concept; in that they work by converting electrical energy into mechanical energy. This happens by creating a magnetic field which then produces the desired motion. Solenoids operate either a push or pull operation and some can actually do both. Simply put, solenoids signal for valves to open or close as well as to tell certain components to come on or shut off.

In some cases, such as in the transmission, there are multiple solenoids that work together to execute a function.

Starter Solenoids

The starter solenoid is the most recognized solenoid and is used to initiate the engine. This type of solenoid installs in either one of two ways. The first and most common involves attaching it directly to the starter. The second includes detaching it from the starter. In a detached starter solenoid, it instead attaches under the fender well or on the firewall. This solenoid sends a powerful electrical current through the starter motor, which prompts the engine to turnover. This allows the motor to start under its own power.

Transmission Solenoids

This type of solenoid is a valve that is used to control the flow of transmission fluid throughout the engine. This, in turn, allows the truck to shift gears. The transmission solenoid typically installs in the transmission valve body, control unit, or control module. It is important to understand that trucks do not have just one transmission solenoid. There are several solenoids in the transmission for each gear that allows for shifting. The truck’s engine control unit or transmission control unit senses the speed of the truck and sends a signal to the appropriate shift solenoid in the truck to allow upshifting or downshifting of gears as needed.

Four-Wheel Drive Solenoids

Four-wheel drive solenoids are responsible for engaging and disengaging the four-wheel-drive feature of the semi. The size of the truck will depend on the number of solenoids required to initiate the four-wheel drive. You will find an even number of solenoids on each side of the truck in the housing. A failure in any one solenoid will cause the four-wheel-drive feature to either work improperly or not at all. A point of interest is that solenoids are not found in trucks that you have to engage and disengage the four-wheel-drive feature manually.

Solenoids for Doors and Hoods

Door solenoids are powerful enough to open even the toughest doors and hoods of semi-trucks. The number of solenoids per door or hood will depend on the size of each component. Solenoids allow for easy opening of each component by either the push of a button or the flip of a switch. There are solenoids available that are anti-rust and will last much longer than cheaper quality solenoids that are subject to rust, cracks, and leaks.

Window Solenoids

Manual windows will not have solenoids, but semis that have automatic windows will have solenoids. The function of the solenoids is to signal the windows to move up and down. This can either be by a remote, button, or a switch.

Fuel Injection Solenoids

The bottom line is that your semi will not run if the engine is not receiving fuel. The fuel injection solenoid’s function is to tell the injectors when to release fuel to the engine. There are different types of fuel injection solenoids available that are able to reduce emissions and increase the efficiency of the vehicle.

Diesel Fuel Shut-Off Solenoid

A diesel fuel shut-off solenoid is responsible for the regulation of fuel to the engine. It contains an inlet pipe, which then transports the diesel fuel from the fuel line to the solenoid valve. This type of solenoid is typically installed as part of the main electrical system. This means that abnormal temperatures or malfunctions will be monitored and if something goes wrong, the electrical current to the solenoid is shut off. The valve then closes and prevents fuel from reaching the engine.

Solenoids Power Accessories

Many vehicle accessories are powered by solenoids, and semis are no exception. Unlike traditional vehicles, semis must have the ability to perform unique functions. For instance, dump trailers must have the ability to lift and lower the bed. This is accomplished with the use of solenoids. In fact, solenoids are used to power many special features of semi-trucks.

How Many Solenoids Do Semi Trucks Have?

There is not a one size fits all answer to this question. The fact of the matter is that the number of solenoids will depend on what size semi you have and what features are on it. For example, is it a four-wheel drive? Does it have power or manual windows and doors? What kind of special functions are installed on the semi? The answer to all of these questions will impact the number of solenoids on your truck.

Turn to the Solenoid Specialists

Johnson Electric is the premier expert in solenoids for semi-trucks. Our specialists can walk you through all your options and help you decide on the best option to fit your needs. If you aren’t quite sure what you need, we are more than happy to give you professional advice on what might work best for your needs. Contact us for more information on our line of high-quality solenoid products.

Contact Us