SENSOPART FT 25-R-PS-M4M IP69K Enclosure Rating, Proximity Sensor, 800 MM MAX Working Distance, PHOTOELECTRIC, Teach-in Adjustment, M8-4 PIN Metal Plug, PNP-Normally Open Output: Amazon.com: Industrial & Scientific
PNP Output 4-Channel photoelectric Isolation Module PLC Signal Level Voltage Conversion Board unidirectional Transmission - (Size: Board, Color: 1.8V to 12V): Amazon.com: Industrial & Scientific