The RPS-401 and RPS-426 are self-contained ultrasonic sensors in a 30mm barrel housing, powered by 20-30VDC. A sealed transducer provides protection in hostile environments. The sensor can be operated in two modes a proximity and a hysteresis mode. Operating as proximity sensors and level sensors. The frequency of operation for the RPS-401 is 212kHz for the 4" to 40" range and 150kHz for the 8" to 80"range. The RPS-426 has an 8" to 80" range, and operates at a frequency of 150kHz. These sensors also have built-in short circuit protection for the outputs as well as reverse polarity protection on the input.

The RPS-401A, RPS-426A analog ultrasonic sensor is mounted in a 30mm barrel housing, and is completely self contained. It is powered by 20-30VDC, and is reverse polarity protected. It also has a narrow beam angle which enables it to get into tight places. A flat target can tilt up to 8 degrees and still be detected. The RPS-401A, RPS-426A have 2 short circuit protected analog outputs, 4-20mA and 0-10 VDC. These outputs can easily be inverted and can be scaled over almost any range by means of adjusting the zero and span controls. For set-up purposes an LED strength indicator is provided. This LED is Green when not detecting and fades to Red as a target moves into place, depending on how much reflected signal is coming back from the target. These analog ultrasonic sensors can be used as a level sensor, loop control, roll diameter, and many more applications where a continuous distance measurement is required.