Sensors that house an emitter and a receiver separately to create an infrared sensing barrier are known as a _______.
A) limit switch
B) proximity switch
C) light curtain
D) pressure sensor

Question

Quizplus · Accepted Answer

Light curtains are safety devices consisting of an emitter and receiver that create an infrared sensing barrier, often used around hazardous areas to stop machinery if the light barrier is broken.

Sensors That House an Emitter and a Receiver Separately to Create