Detail: 
A proximity sensor switch circuit that used as a detective
circuit. The circuit working is based on the reflection of an
infrared hitting the object and reflecting back to the receiver.
It is good for checking and detecting
any approaching objects.
Technical specifications:
- Power supply : 12VDC.
- Consumption : 100mA. max.
- Detecting distance : 5-30 cm. (approx.)
- Time working delay : 0-10 sec.
- Loading : max. 5A./220VAC.
- PCB dimensions : 3.84 x 2.01 in