SICK AG
- Manufacture of non contact sensors. From Germany.
- http://www.sick.com/

Magnasphere Corp.
- Manufacturer of hermetically sealed ferrous proximity switches in steel housings.
- http://www.magnaspherecorp.com

Zhongxu Microelectronics Co., Ltd.
- Manufacturer of magnetic sensors using series Hall effect sensors. From China.
- http://www.zhongxu.com/

Sensor Solutions Corp
- Manufactures magnetic hall effect and magnetoresistive sensors, transducers and switches for linear or rotational speed, direction, and position that detect ferrous metals.
- http://www.sensorsolutions.info/

Stem s.r.l.
- Manufacture of proximity magnetic sensors, magnetic units, and float switches for the industry.
- http://www.stemsrl.it/

Reed Electronics AG
- Manufacturer of level switches, magnetic float switches, level sensing elements, bypasses, ultrasonic Sensors, radar sensors, and proximity switches. Based in Switzerland.
- http://www.reedag.ch/

Selet Sensor
- Manufacturer inductive and catacitive sensors, photoelectric sensors, proximity switches, digital instruments and encorders. From Italy.
- http://www.selet.it/

EMS Controls Inc.,
- Distributor for inductive and capacitive proximity switches, switching, sensing, safety, and control devices for industrial automation with online ordering.
- http://www.switchingdevices.com

Accent
- India manufacturer of inductive and capacitive proximity switches, photoelectric sensors, and potentiometric transducers. Company overview and product descriptions.
- http://www.accentsensors.com/

Sensatech Ltd
- Produces custom electronic non-contact sensing solutions primarily based on capacitive and electric field sensing techniques for proximity switches and sensing arrays.
- http://www.sensatech.com

Contrinex
- Manufacture proximity switches with online line card, catalogues, cross reference lists and PDF application notes.
- http://www.contrinex.com/

INFRA Electronic Sensors
- Manufacturing photoelectric sensors, inductive and capacitive sensors, thru beam photoelectric sensors, magnetic and connectors. From Italy.
- http://www.infrainternational.com/prodotti.htm

Whitman Controls
- Manufactures miniature pressure, vacuum, temperature, differential pressure, and liquid level switch industries.
- http://www.whitmancontrols.com/

Capacitec, Inc.
- Manufacturer for precision movement detectors, part-dimensional sizing, thin gap sensors and strain extensometry for material strength testing.
- http://www.capacitec.com/

Tri-Tronics Co., Inc.
- Manufactures photoelectric sensors and fiber-optic light guides.
- http://www.ttco.com/

Stedham Electronics
- Manufacture a range of capacitive proximity sensors. Data sheets in PDF.
- http://www.stedham.com/

Quantum Research
- Manufactures capacitance sensors and a large menu of processing options.
- http://www.qprox.com/

Proxistor
- Capacitive, inductive, photoelectric, ultrasonic proximity switches, and switch test units.
- http://www.proxistor.com/