Keyence PR-G51CBD Photoelectric Sensor transmitter & receiver (see description)

Keyence PR-G61CBD M18 Threaded Retro-Reflective Photoelectric Sensor M12 4-Pin

Keyence PZ-M12 Square Reflective Photoelectric Sensor M8 Connector 4-pin

Keyence PZ-G51CBR Photoelectric Sensor Receiver M12 4-Pin Free Ship

Keyence PR-G51CP Thrubeam Photoelectric Sensor M8 4-Pin Connector Used See Pics

KEYENCE PR-G51CP PHOTOELECTRIC SENSOR

Keyence PZ-V32P Photoelectric Sensor, PNP, Red LED, 5-300mm, M8 4-Pin, 12-24VDC

Keyence PZ-G51CBT Thrubeam Photoelectric Sensor Transmitter, M12 4-Pin