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Ultrasonic flow velocity probe - low power: RS485 MODBUS | MAINSTREAM MEASUREMENTS

MainProbe RS485 MODBUS is a low-power ultrasonic velocity probe for immersed water and process liquid measurements.

PRICE ON REQUEST

The MainProbe RS485 MODBUS is a compact, low-power ultrasonic velocity probe designed for immersed flow measurement in water and process liquid applications. It communicates through a RS485 Modbus RTU interface and provides bidirectional velocity measurement from very low flow conditions up to 5 m/s. The probe operates with a minimum water depth of 30 mm and continuously applies temperature compensation to maintain reliable velocity measurement.

Advantages

Compact immersed design integrating transmission, reception, and ultrasonic signal processing
Bidirectional measurement range from 10 mm/s to 5 m/s
RS485 Modbus RTU communication for straightforward integration into monitoring systems
Low power consumption with 6 to 28 Vdc supply
Continuous temperature correction to compensate for sound velocity variations
Mainstream Adaptive Measurement System that automatically adjusts acquisition time to flow conditions
Signal quality monitoring with histogram and diagnostic support for measurement validation
IP68 fully encapsulated construction for demanding field environments

Main Features

Measurement principle	ultrasonic phase coherence delay measurement
Transducer type	immersed sensor with integrated transmission, reception, and signal processing
Velocity range	from -5 m/s to -10 mm/s and from 10 mm/s to 5 m/s
Resolution	1 mm/s
Minimum flow depth	30 mm
Start-up time	measurement available 1.5 seconds after power-up
Communication	Modbus RTU via semi-duplex RS485
Address range	1 to 247
Configurable baud rates	2400, 4800, 9600, 19200, 38400, 57600, 115200
Supply voltage	6 to 28 Vdc
Maximum current	25 mA in measurement mode
Materials	profiled PVC-U body and polyurethane cable
Protection rating	IP68
Operating temperature	-10 °C to 80 °C
Dimensions	105 x 50 x 20 mm
Maximum cable length	300 m
Weight	850 g with standard 10 m cable

Typical applications

Open channel flow monitoring
Wastewater and effluent flow measurement
Process water velocity monitoring
Embedded liquid flow monitoring systems using Modbus communication
Installations requiring compact immersed ultrasonic sensing
Sites where signal quality diagnostics are important for measurement confidence

Why choose MainProbe RS485 MODBUS

MainProbe RS485 MODBUS combines compact mechanical design, stable digital communication, and advanced adaptive measurement management in one immersed ultrasonic probe. Its low power requirement, temperature-corrected velocity measurement, and integrated signal quality monitoring make it a strong solution for users who need reliable flow velocity data in water and liquid applications while keeping integration simple through RS485 Modbus RTU.

What should you check before choosing this product?

Check the pipe or channel geometry, flow conditions and sensor installation requirements. Confirm the measurement range, output interfaces and power supply for the intended monitoring point.