- TYPE DETECTOR
In general, the detector is divided into 2 types :
- Detection by direct contact (touching the objects to be detected)
- Detection with no direct contact (no contact with the object to be detected)
Detector is included in the type DETECTION BY DIRECT CONTACT:
- Limit Switch
- Pressure Switch
Detector is included in the type DETECTION WITH NO CONTACT DIRECTLY:
- Photoelectric
- Proximity
- Ultrasonic
Limit Switch
Work based on the change in position of the actuator (Part in contact with the object being detected) that move the block contacts within the limit switches. Selection of type of actuator is adapted to the application, size, type and shape of the object to be detected.
Pressure Switch
Is a tool to maintain pressure at a certain limit (between PH boundary, with the lower limit PB). When the pressure reaches the value of PH (hence the switch will change state from On to Off) and if the pressure decreases and reaches the value of PB (the switch will change state from Off to On). The difference between the PH and PB is called Differential. There are 2 types of Pressure Switch :