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MB7900 Sensor to 4-20mA Signal Converter

The MB7900 is an optional add-on for most WR and TankSensor models, enabling seamless integration with systems that require a 4-20mA output. This converter provides a 4-20mA signal through an M12 (8-pin) connection, available in both male and female connector versions, or via flying leads.

With the MB7900, there’s no need for third-party adapters, daughter boards, or additional workarounds to achieve 4-20mA compatibility—everything is built into the solution.

Note: This is not a standalone product. It must be selected as a configurable option for compatible sensors. Selecting "4-20mA" under output will automatically add the MB7900 Sensor to 4-20mA Signal Converter to the sensor's build.

MB7851 is a weather-resistant ultrasonic tank-level sensor with 1 mm resolution, 5 m max range, and ~2 Hz read rate. Output is selectable by wiring—RS232 or TTL serial, scaled analog voltage, or analog envelope; supply 3.0–5.5 VDC

Near-field handling is built in: targets closer than 50 mm are reported as 50 mm for predictable readings.

(Optional at purchase: 4–20 mA; requires 9–36 VDC and replaces standard outputs). 

Ranges from 500mm to 5000mm with 7.5Hz read rate. 4mA minimum range and 20mA maximum range. Reports range to closest target.