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RPS-409A-IS3 Intrinsically Safe

Analog Ultrasonic Sensor

  • Intrinsically Safe
  • C-UL-US
  • LED Indicator
  • Various Sensing Ranges
  • Analog Voltage Output
  • Temperature Compensation
  • PVC Enclosure
  • Wide Temperature Range
  • Sync/Tx Input Line

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The RPS-409A-IS3 is an intrinsically safe analog ultrasonic sensor available in a variety of ranges. The RPS-409A-IS3 sensors can be used in hazardous gas or dust environments classified as Class I, II, or III when used with approved intrinsic safety barrier(s). See the RPS-409A-IS3 User Manual and Control Drawing No. 14122606 for further information on installation in hazardous locations.

The sensor is self-contained in a 30mm barrel style enclosure, and is powered by 16 – 30 V dc with reverse polarity protection. The RPS-409A-IS3 has a short circuit protected 0 – 10 V dc analog output. The analog voltage is a fixed volts per inch based on the maximum range of the unit. For example, when using the RPS-409A-80-IS3, the output is a linear 0.125 V per inch. A target placed 10 inches from the sensor will result in an output of 1.25 V, and a target placed 80 inches from the sensor will result in an output of 10 V.

The RPS-409A-IS3 has built-in temperature compensation to provide accurate readings throughout the entire operating temperature range.
An LED indicator is provided. The LED is green with no target detected and changes to red when a target is detected. The sensor is completely sealed and connection must be made with a cable having a rating of IP67 or greater.

In addition to the analog output line the sensor also has a Sync/Tx line. This line can be used for connecting multiple sensors together (Sync) to prevent cross talk, or (Tx) to control when the sensor transmits.

The RPS-409A-IS3 is designed to take advantage of today’s PLC and computer analog input cards. The numerical values that are programmed into the PLC or computer will determine the zero and span of the sensor.

Learn how our ultrasonic sensors work.


Enclosure Material:Polyvinyl Chloride (PVC) Enclosure
with PVC sensing face
Ambient Temperature:-40 to +60°C or -40 to +140°F
Input Current:24mA maximum with 24VDC
applied to the safety barrier
Ambient Temperature:0 – 60°C or 32 – 140°F
Humidity:0 – 95% Non-Condensing
Power Input:16 – 30VDC Reverse Polarity Protected
(Note: A minimum of 24VDC must be applied
to the safety barrier)
Output:Analog Voltage Output 0 – 10V
(Load 100k Ohms to infinity)
Short Circuit Protected
Entity Parameters:See Control Drawing No. 14122606


Model Number:Sensor Range:Transducer Frequency:Response Time:Volts Per Inch:
RPS-409A-40-IS34 – 40″175kHz85ms0.250V
RPS-409A-80-IS36 – 80″135kHz85ms0.125V
RPS-409A-144-IS310 – 144″70kHz175ms0.069V
RPS-409A-216-IS312 – 216″70kHz175ms0.046V


Explosion Protection and Approvals

Canada and USA (C-UL-US)
UL/cUL File # E226209
Certificate Number: 20150302-E226209
Class I, Groups A, B, C and D
Class II, Groups E, F and G, and
Class III hazardous locations.


Ordering Information

Part NumberRangeDescription
RPS-409A-40-IS34″ to 40″0-10VDC Analog Output
RPS-409A-80-IS36″ to 80″0-10VDC Analog Output
RPS-409A-144-IS310 – 144″0-10VDC Analog Output
RPS-409A-216-IS312 – 216″6′0-10VDC Analog Output
F32-54963022 Meter Cable, M12, 4-PIN, IP67, 18 AWG – Sold Separately
F32-54963055 Meter Cable, M12, 4-PIN, IP67, 18 AWG – Sold Separately
F32-54963186 Meter Cable, M12, 4-PIN, IP67, 18 AWG – Sold Separately
F50-9240905ZSB-409A Safety Barrier – Sold Separately
F33-5441504DIN Rail Grounding Block – Sold Separately


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