The RPS-450 Ultrasonic Proximity Sensors are solid state position sensors including solid state outputs and therefore have nearly unlimited life. Features include: Self Contained Range 5 to 30 or 10 to 72 in. Narrow Sensing Beam High Frequency LED Indicator Potentiometer For Set-up Environmentally Sealed Housing Operates in Hostile Environment Operating Voltage 120VAC (60Hz) N.O. & N.C. Solid State Relay Outputs Plastic Housing Click below to view the datasheet: Datasheet Enquire Now