[wpfilebase tag=file path=’datasheets/UltrasonicSensor/rps-322.pdf’ tpl=simple /]

  • Range 8″ to 72″
  • Narrow Sensing Beam
  • High Frequency – 150kHz
  • 2-Way Power Operation
  • Stainless Steel Housing
  • Adjustable Delay Controls
  • 2 Multiplexed Transducers
  • LED Indicators
  • Isolated Form C Relay Outputs
  • Small Electronic Controller


The RPS-322 has 2 sealed stainless steel multiplexed transducers, independent range control adjustments, LED indicators, and form C relay outputs. The transducer head is constructed of 303 grade stainless steel with a 302 grade stainless steel sensing face, and is best suited for environments where dirt and moisture are a problem, as well as some chemical environments. This sensor also has a unique master and slave feature which enables many of the same units to be used within close proximity of one another without cross-talk interference. For example, if three sensors are needed in a close area, one sensor would be left as a master and the other two would be slaves.

This is done by means of the X IN, X OUT, and GND connection on the board. One sensor (master) would send a signal by means of the X OUT and GND terminals. These would be connected to the X IN and GND terminals of the other two sensors (slaves). With the sensors connected in this way, all units would be transmitting and receiving at the same time. This then would prevent cross-talk and enable all three sensors, or all six transducers to be used at the same time in close proximity of one another. There are also separate turn ON and turn OFF DELAY potentiometers provided for each transducer. All four DELAY controls are located along side the black module inside the enclosure box. The remote transducers allow for mounting of the sensor heads in cramped spaces while the controller is out of the way. The (2) independent and isolated form C relays furnish N.O. and N.C. outputs. This sensor operates at a frequency of 150kHz for the 72″ range. This sensor has a narrow sensing beam. Mounting flanges, LED indicators, ranging potentiometers, and 6-ft. transducer cables are included. Optional cable lengths

Proximity Detection

Proximity detection is the detection of an object in a given range. The detection range of the RPS-302 is controlled by the “Range Control” potentiometers 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.


Product Specifications:
Operational Range: Adjustable 8″ to 72″
Power Input: 120VAC 120VAC
15-24 VDC
Input Current:
Ambient Temperature:
40 Milliamps
0ºC to 60ºC
or 32ºF to 140ºF
Enclosure Controller:
Transducer Housing:
Output: N.O., N.C.
(one for each transducer)
Metal Enclosure
303 Grade Stainless Steel
302 Grade Stainless Steel Sensing Face
Isolated Form C Relay
.5 Amp Maximum at 120VAC
Transducer Frequency: 150kHz for 72″
Adjustable Response Time: 8″ to 72″
ON 60mS – 2S
OFF 60mS – 2S
Weight of Controller: 34.2 ounces
Weight of Each Transducer: 4.5 ounces



  1. Angle of Tilt
  2. Beam Spread
  3. Wiring Diag. – For RPS-302
  4. Wiring Diag. – For Master – Slave configuration
  5. Delay Controls – For RPS-302
  6. Mounting Dimensions
RPS-322-72 8″ – 72″ Isolated Form C Relay for each Transducer