Lanbao PSS-TM20 M18 Through-Beam Photoelectric Sensor Lanbao PSS-TM Series is an M18 cylindrical through-beam photoelectric sensor series for DC automation systems that need long-distance object detection with separated emitter and receiver units. Through-beam sensing provides stable detection when the object passes between the transmitter and receiver optical path. This listing covers PSS-TM20DNB and PSS-TM20DPB receiver variants for a 20m through-beam sensing distance. The series uses infrared light, 10-30V DC supply, NPN or PNP output, NO/NC switching logic, metal housing, IP67 protection, and a 2m PVC cable connection reference. For related Lanbao photoelectric sensors, compare the Lanbao PSS-TM-E2 Connector Series, Lanbao PSS-PM Polarized Series, Lanbao PSS-GM Transparent Object Series, and Lanbao PSE-TM20 Through-Beam Series. Technical Specifications Brand Lanbao Series PSS-TM Series Store SKUs Lanbao-PSS-TM20DNB and Lanbao-PSS-TM20DPB Sensor Type M18 cylindrical through-beam photoelectric sensor Sensing Mode Through-beam transmitter and receiver optical detection Emitter Reference PSS-TM20D reference Receiver Options PSS-TM20DNB for NPN output; PSS-TM20DPB for PNP output Sensing Distance 20m reference Light Source Infrared light reference Supply Voltage 10-30V DC Output Type NPN or PNP depending on selected variant Output Logic NO/NC reference Load Current