This part is a kind of semiconductor called TM-1808PC-C.

Function of this product has Sensors.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

TM-1808 Series Features: ¡D PBT Housing ¡D Detecting Distance: 6~12 mm ¡D DC 3 Wire & AC 2 Wire Specification: Type Wire Model Item NPN Output PNP Output DC 3 Wire Socket Water Proof AC 2 Wire - Normal Open Normal Close Normal Open Normal Close Normal Open Normal Close Normal Open Normal Close TM-1808NO TM-1808NC TM-1808NO-P TM-1808NC-P TM-1808NO-CTM-1808NC-C TM-1202AO TM-1202AC TM-1808PO TM-1808PC TM-1808PO-P TM-1808PC-P TM-1808PO-C TM-1808PC-C - Max Detecting Distance 8 mm ± 10% Setting Detecting Distance0 - 6.4 mm Standard Object Iron 18 × 18 × 1t Hysteresis Accuracy Loop Protection Power Supply Load Current Response Frequency Indication Protection Vibration Shock Operating Temperature Operating Humidity Housing Material Wiring Material Weight 15% of Setting Detecting ± 1 [ ... ]

TM-1808PC-C PDF Datasheet Download