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RPS-409A Self Contained Sensor

Narrow Beam Analog Distance Sensor

  • Various Sensing Ranges
  • Narrow Sensing Beam
  • LED Indicator
  • Short Circuit Protected
  • Temperature
  • Compensation
  • Wide Temperature
  • Range
  • Sync / Enable Input Line
  • Input Voltage 20-30VDC
  • Reverse Polarity Protected
  • Self Contained Sensor
  • Analog Voltage Output
  • RPS-409A in PVC Housing
  • Chemical Resistance (PVC)
  • Quick Disconnect Connector

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About the RPS-409A Sensor

The RPS-409A analog ultrasonic sensor is a self contained sensor in a 30mm PVC barrel housing. It is powered by 20-30VDC with reverse polarity protection. It also has a narrow beam angle which enables it to get into tight places. A flat target can tilt up to 10 degrees and still be detected.

The RPS-409A has a short circuit protected analog 0-10 VDC output. The output is a linear .125 volts per inch. Example: a target placed 10 inches from the sensor will result in an output signal of 10 volts.

The RPS-409A has a temperature compensation built in to provide accurate readings throughout the entire operating range.

For set-up purposes an LED indicator is provided. The LED is Green when not detecting and changes to red as a target moves into place. The sensor is completely sealed and connection is made by way of IP and NEMA rated cables.

Besides the input and output lines there is an enable or synchronous line provided. This can be used to fire the sensor at a particular time or for connecting multiple sensors together to prevent crosstalk.

The RPS-409A is designed to take advantage of today’s PLC and computer analog input cards. The analog card chosen will determine the resolution of the system. The numerical values that are programmed into the PLC or computer will determine the zero and span.

If a set point or set points are required in the application look up the Migatron SPC-701SPC-704, or M-1000 control products. Both the SPC-704 and M-1000 can also provide excitation power to drive the sensor.


Learn more about our Ultrasonic Sensors


ModelRangeInput CurrentVolts/Inch
RPS-409A-404″ – 40″35mA Typical0.250
RPS-409A-806″ – 80″35mA Typical0.125
RPS-409A-144 10″ – 144″45mA Typical0.069
Power Input:20 – 30 VDC Reverse Polarity Protected
Ambient Temperature:-40° to 60°C or -40° to 140°F
Humidity:0% – 95% Non -Condensing
Housing Material:PVC Housing with a PVC sensing face
Output:Analog Voltage Output 0 to 10 Volts
(Load 500 ohms to infinity)
Short Circuit Protected
ModelTransducer FrequencyResponse Time
RPS-409A-40175kHz Typical25ms Typical
RPS-409A-80135kHz Typical25ms Typical
RPS-409A-14470kHz Typical75ms Typical
Weight:Sensor only 4 ounces
Sensor plus cable
shipping weight 9 ounces
Enclosure:Rating IP65 (NEMA 4), Rating IP67 (NEMA6P) Depending on cable selection.

Ordering Information

Part NumberRangeOutput
RPS-409A-404″ – 40″0 – 10VDC Analog
RPS-409A-806″ – 80″0 – 10VDC Analog
RPS-409A-144 10″ – 144″0 – 10VDC Analog
F32-50700532 meter QD Cable, Pico 4-Pin Locking – Sold Separately
F32-50700942 meter QD Cable, Pico 4-Pin 90° Locking – Sold Separately


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