Taidacent Non Contact Levels of Measurement Flow Sensor Water Level Sensor Level Transmitter Float Switch Water Level Switch PNP Output: Amazon.com: Industrial & Scientific
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
Amazon.com: Telemecanique XS608B1PAL2 Universal Series Inductive Proximity Sensor, Multi-Function, Metal 8-mm Barrel, 3-Wire DC PNP Wiring, PNP Input, NO Output, 2-m Electrical Cable : Industrial & Scientific
BS5-P1ML-P, Push Button Type Photomicro Sensor, 0 to 5mm, Light On, 1M Cable, PNP Output, 12-24 VDC: Amazon.com: Industrial & Scientific
TRI-TRONICS PZICF4 4-Wire, NPN/PNP Output, Maximum Sensing Range Depends ON The Fiber Optic, F4 Glass FIBEROPTICS Block, 880 NM Invisible Infrared, M8 Connector, Infrared Sensor, 10-24 VDC: Amazon.com: Industrial & Scientific