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Proximity Switches

A reliable source for Proximity Switches information and leading Proximity Switches Companies & Manufacturers.

Infrared proximity switches work by sending out beams of infrared invisible light. A photodetector on the switch determines if there are any objects nearby by detecting any reflection of the beam of light that was sent out. However, due to background light, a switch with only a light source and photodiode is susceptible to inaccurate readings. For that reason, more complex models modulate the transmitted light at a specific frequency and have receivers that only respond to said frequency. Read More…

Proximity Switches Proximity switches are made to open or close an electrical circuit when they either make contact or come within a certain distance of an object. They detect objects in close "proximity." Proximity switches come in four basic types, which are: infrared, acoustic, capacitive, and inductive.
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Leading Manufacturers

Eden Prairie, MN  |  800-806-6113

Our membrane switches are known for their high-quality and affordable prices. We work hard to find the precise parts that will work with your every need. It is our goal to create a relationship with you that is beneficial to both parties.

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ALUDEC USA $$$

Perry, NY  |  800-227-5718

JN White is an ISO 9001:2015 and ITAR-certified manufacturer of membrane switches, graphic overlays, and custom labels. We nimbly handle projects big and small and have the uncommon ability to translate what our customers need into high-quality, high-precision outcomes.

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JN White $$$

Watertown, CT  |  800-853-5617

ECI Technologies is a leading designer and manufacturer of innovative membrane switches, graphic overlays and electronic interfaces. We can produce tactile and non-tactile switches and keypads, as well as add features such as backlighting and environmental protection. We also offer quick-turn prototype design and production. Since 1991, we have been serving industries such as industrial, medical, military, and avionics.

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ECI Technologies $$$

Kirkland, WA  |  888-211-6325

With over 30 years of experience, ALMAX is a leading manufacturer of membrane switch assemblies, printed/flexible electronics, and interactive technologies. Our engineering and manufacturing capabilities are implemented and trusted around the globe, and we're proud to offer our clients a complete range of services that meet the highest standards of quality and reliability.

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ALMAX $$$

New Bedford, MA  |  800-451-3275

Design-Mark Industries is a membrane switch manufacturer offering custom membrane keyboards, tactile switches, membrane keypads and screen-printed graphic overlays. An ISO 9001-certified company, we meet the specifications for die cutting, shielding and insulators.

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Design-Mark Industries $$$

Cape Coral, FL  |  239-558-8810

Custom capacitive touch keypad and graphic overlay design service specializing in rapid prototypes. Superior to membrane switch, our sub surface touch and proximity sensor technology can communicate via USB, Serial, SPI, I2C and other custom communication protocols. With our rapid prototype service you can have a custom touch keypad, electronics and graphic overlay in 5 days or less!

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Rapid Keypads $$$
placeholder image ALUDEC USA JN White ECI Technologies ALMAX Design-Mark Industries Rapid Keypads

Models that are even more complex can use the light reflected from an object to compute its distance from the sensor. In principle, acoustic proximity switches are similar to infrared switches, but instead of light, they use sound. Acoustic switches work by using a transducer to transmit inaudible sound waves at various frequencies in a preset sequence. Then, they measure the length of time the sound takes to hit a nearby object then return to a second transducer on the switch.

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Essentially, acoustic switches are employing echolocation, a practice similar to sonar, used in nature by bats and dolphins. Capacitive proximity switches sense distance to objects by detecting changes in surrounding capacitance. A radio-frequency oscillator is connected to a metal plate, and its frequency changes when the plate nears an object.

When this change takes place, the frequency detector sends a signal telling the switch to open or close. Finally, inductive proximity switches sense distances to objects by generating magnetic fields, similar in this way, to metal detectors. To function, a wire coil is charged with an electrical current, which is measured by an electronic circuit. If a metallic part gets close enough to the coil, the current will increase and the switch will open or close accordingly.

Proximity switches are used primarily in manufacturing processes and equipment, robotics and security systems. For example, proximity switches may measure the position of machine components, detect the opening of a door or monitor a robot or its components proximity to an object, and steer it accordingly.

Proximity Switches Informational Video

 
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