Ranges: 4-14″, 5-36″, 8-72″
Narrow beam sensor
On/off output with analog capability

Download RPS-300 Datasheet

Product Description

  • Various Sensing Ranges
  • Narrow Sensing Beam
  • High Frequency
  • LED Indicator
  • Sealed Transducer
  • RPS-500 Compatible
  • 3-Way Power Operation
  • Isolated Form C Relay Output
  • Small Electronic Controller
  • Small Remote Transducer

The RPS-300 is a high frequency, sealed transducer unit best suited for environments where dirt and moisture are a problem. The transducer heads are made of Delrin with epoxy face for the 14″ and 36″ sensors and Valox with a silicon face for the 72″. The remote transducer allows for mounting of the sensor head in cramped spaces while the controller is out of the way. The ranging and proximity modes provide the versatility of simple detection, or actual distance measuring. The isolated form C relay furnishes N.O. and N.C. outputs, and with the addition of the RPS-500 card various analog outputs are supplied. The RPS-300 sensor operates at a frequency of 222kHz for the 14″ and 36″ ranges and 150kHz for the 72″ range. This sensor has a narrow sensing beam. Sensing ranges available for the RPS-300 include 4″ to 14″, 5″ to 36″, and 8″ to 72″. Mounting flanges, LED indicator, ranging potentiometer and 6-ft. transducer cable are included. Optional cable lengths are available.

Download RPS-300 Datasheet

Proximity Detection

Proximity detection is the detection of an object in a given range. The detection range of the RPS-300 is controlled by the “Range Control” potentiometer located on the front cover of the controller. Any object within the desired range is detected, while objects out of range are ignored. The detect point is independent of size, material, and reflectivity. The Proximity Option is denoted by the part number RPS-300-14.

Ranging Measurement

With the addition of the RPS-500 card, Analog outputs of 0-10 VDC and 4-20 mA are provided. Precise distances of an object moving to and from the transducer are measured via time intervals between transmitted and reflected bursts of ultrasonic sound. The example shows a target detected at 6 inches from the transducer and moving to 10 inches. The distance change is continuously calculated and outputted. Ranging Option is indicated by following the part number with (-500). (Example: RPS-300-14-500)

Product Specifications:
Operational Range: Adjustable 4″ to 14″
Adjustable 5″ to 36″
Adjustable 8″ to 72″
Power Input: 120VAC
* Only 120VAC or 24VDC
with 500 Analog card.
15-24 VDC
12VDC Regulated
12 – 17VAC
Input Current:
Input Current with 500 card:
Ambient Temperature:
30 Milliamps
50 Milliamps
0ºC to 60ºC
or 32ºF to 140ºF

Transducer Housing:

Output: N.O., N.C.

Metal Enclosed
Silicone Rubber or
Teflon Sensing Face
Galvanized Steel in 14″ or 36″,
Plastic in 72″
Isolated Form C Relay
.5 Amp Maximum
at 120VAC
12VDC Logic Signal
Output with 500 card: 0 – 10VDC, 4 – 20 mA
Analog Outputs
with Zero, Span, Sample,
and Hold controls.
Transducer Frequency: 222 kHz for 14″ and 36″
150kHz for 72″
Response Time: 4″ to 14″ 5″ to 36″ 8″ to 72″
30mS – On – 50mS – On 60mS – On
30mS – Off – 50mS – Off 60mS – Off
Weight of Controller: 34.2 ounces
Weight of Transducer: 4.5 ounces


  1. Angle of Tilt
  2. Beam Spread
  3. Wiring Diag. – For RPS-300
  4. Wiring Diag. – For RPS-500
  5. Mounting Dimensions

*Dimension changes from 2.5″ to 3.75″when ordered with the 500 Analog Ranging card.
**Transducer Diameter changes to 30mm when ordered with the Teflon face or in the 72″ range.


4″ – 14″
5″ – 36″
8″ – 72″
Isolated Form C Relay
4″ – 14″
5″ – 36″
8″ – 72″
0 – 10VDC and 4 – 20 mA Analog