proximity switch

from Wikipedia, the free encyclopedia

Proximity switches , also proximity sensor , proximity switch , or ( arrival ) proximity sensor called, are sensors that on approach d. H. react contact-free without direct contact. Proximity switches are used, for example, in technical processes to detect the position of workpieces and tools, and to trigger safety measures.

Types of proximity switches

The illuminated optical proximity switch of a smartphone (BlackBerry Leap)
The flashing of the proximity switch on a smartphone during a call


Proximity sensor of an iPhone 3GS


  • F. Ebel, S. Nestel: Textbook proximity switches . Festo Didactic GmbH & Co. KG, Esslingen 2003, ISBN 3-8127-3045-6
  • Berthold Heinrich, Petra Linke, Michael Glöckler: Basics of automation - sensors, regulation, control . Springer Fachmedien, Wiesbaden, 2015, ISBN 978-3-658-05960-6 .

Web links

Individual evidence

  1. Greg Milette, Adam Stroud: Professional Android Sensor Programming . John Wiley & Sons, May 17, 2012, ISBN 978-1-118-22745-9 , p. 85.