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RPS-450 Ultrasonic Proximity Sensor

  • 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

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About the RPS-450

The RPS-450 is a self-contained, 120VAC powered, ultrasonic proximity sensor in a 30mm barrel housing. The sensor is range or distance sensitive, which enables the sensor to detect objects only within the desired range and reject objects outside the desired range. The RPS-450 product line features solid state construction including the solid state relay outputs. The sensor operates in the ultrasonic spectrum and is therefore not heard. For initial setup purposes, a built in potentiometer and LED indicator are provided.

The LED indicator illuminates when the ultrasonic wave from the sensor is reflected back to the sensor within the desired range. The sensor provides precise proximity or level sensing regardless of target color, density, or transparency. The sensor is equally effective on liquid, metal, plastic, or glass targets.


Operational Range:




Adjustable 5-30″

Adjustable 10-72″

Power Input:120VAC
Input Current:30mA
Ambient Temperature:0 – 60°C or 32 – 140°F
Humidity:0 – 95% Non-Condensing
Transducer Housing:PBT Plastic
Transducer Face:Silicone Rubber
Output:Zero-Crossing Detection
Isolation 3750VRMS
Off State Leakage 0.001A Max.
Load Current 0.005 – 1A Peak
Current for 1 Cycle 10A Max.
Switching Voltage 120VAC
Transducer Frequency:





150 kHz

Response Time:






Weight:11 ounces

Ordering Information

Part NumberRangeOutput
RPS-450-305 – 30″Solid State Relays, N.O. & N.C.
RPS-450-7210 – 72″Solid State Relays, N.O. & N.C.


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