Key Questions
The following key questions are answered in this module:
What are photoswitches, proximity sensors, and feedback devices used for?
Photoswitches, proximity sensors, and feedback devices are all used to detect objects or information. They are useful in industrial and manufacturing environments to sense product or personnel in the line of machinery or equipment.
What is a photoswitch?
Photoswitches are electrically powered sensors that detect light. They are typically used to sense the presence or absence of an object.
What are some common types of photoswitches?
Common types of photoswitches include retroflective, thru-beam, polarized, diffuse, and convergent beam.
What are proximity sensors?
Proximity sensors are used to detect the presence of machinery or material in situations where it is impossible or impractical to touch what is being detected.
What are some common types of proximity sensors?
Common types of proximity sensors include inductive sensors, capacitive sensors, and ultrasonic sensors.
What are feedback devices?
Feedback devices are used to gather and transmit information, such as motor speed, back to a controller.
What are some common types of feedback devices?
Common types of feedback devices include incremental encoders, absolute encoders, and Hall effect encoders.