Ranges: 5-30″, 10-72″
Proximity sensor

Product Description

  • 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
  • RPS-450 in Plastic Housing

The RPS-450 is a stud-mount, completely self-contained, 120VAC powered ultrasonic proximity sensor. This sensors is range or distance sensitive, enabling the sensor to detect objects only within the desired range and rejecting others. The RPS-450 is a solid state sensor including a solid state outputs therefore having nearly unlimited life. The sound source 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 preset range. These sensors provide precise proximity or level sensing regardless of color, density, or transparency. They are equally effective on liquid, metal, plastic, and glass targets.

[Download not found] Proximity Detection

Proximity Detection

Proximity detection is the detection of an object in a given range. The detection range of the RPS-450, 475 is controlled by a potentiometer located on the rear of the sensor.

Any object within the desired range is detected, while objects out of range are ignored. The detect point is independent of size, material, or reflectivity of the object.

Specifications: RPS-450

Figure A

Fig. A

Figure B

Fig. B


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 Number Range Output
RPS-450-30 5 – 30″ Solid State Relays, N.O. & N.C.
RPS-450-72 10 – 72″ Solid State Relays, N.O. & N.C.