Sky-E proximity sensor Co., Ltd.
Here are the details for this proximity sensor:
Part Number: P1C1B1204PC3A2.
Type: M12 Inductive Proximity Sensor, Shielded.
Specifications:
Sensing Distance: 4mm.
Output: PNP-N.C. (Normally Closed).
Voltage: 10-30VDC.
Max Current: 200mA.