Panasonic Through Beam (Emitter and Receiver) Photoelectric Sensor 2 m Detection Range PNP IP67 Block Style EX-23-PN. Electrical Connection: Cable. Maximum DC Voltage: 24V. Optical Technology: Phototransistor. Light Source: LED. Maximum Current: 50 mA. Response Time: <=0.5 ms. Housing Material: PET. Minimum Operating Temperature: -25°C. Maximum Operating Temperature: +55°C.