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Non-contacting Open Channel Flow Area Velocity Sensor

MicroFlow velocity flow sensor

MicroFlow delivers accurate and repeatable velocity flow measurement, either as a stand-alone device or as part of a complete flow system for area x velocity measurement. 

Velocity x area calculation using MicroFlow provides a cost-effective flow measurement option compared to the installation of a primary measurement device, such as a flume, and provides a viable alternative where the hydraulics of the site do not allow for a restriction in the channel.

MicroFlow Features:

  • Non-contacting
  • Cost-effective
  • Lightweight, compact design
  • Minimal installation costs
  • No interruption to service
  • Maintenance-free
  • RS485 Modbus
  • IP68

MicroFlow can either operate as a stand-alone velocity sensor or can be combined with the following flow controllers:

Velocity Interface

Velocity Interface

Simple velocity interface
1 MicroFlow sensor
IP67/NEMA 6.
FlowCERT flow controller


Flow measurement system
1 MicroFlow sensor
Compatible with dB transducer
Ultimate flow controller


Full flow measurement system
Multiple MicroFlow sensors
Compatible with dB transducer and Speedy velocity sensor




MicroFlow liquid velocity sensor datasheet MicroFlow liquid velocity sensor catalogue MicroFlow liquid velocity sensor manual MicroFlow liquid flow velocity case studies


  • Liquid Velocity Flow Measurement
  • Area x Velocity Calculation Measurement
  • Open Channel Flow Monitoring
  • Wastewater, effluent and discharge flow
  • Irrigation Canals & Channels
  • Rivers & Canals
Sensor body material: Valox 357
Mounting connection: Mounting bracket with 45º bend (optional)
Sensor body dimensions: Diameter 90mm x Height 140mm (D 3.54in x H 5.51in)
Sensor weight: Nominal 1kg (2.2lbs)
Transducer cable extensions: Maximum 100m (328ft)
Enclosure protection: IP68
Max. and Min. temperature: -20ºC to +70ºC (-4ºF to +158ºF)
Flammable atmosphere approval: Safe area. (Hazardous area pending)
CE approval: Complies with BS EN61326-1:2013 for emissions and immunity
RADAR approvals: EN 300-440-1
EN 300-440-2
FCC 15.245
Operating voltage: 10-28Vdc
Velocity range: 0.2 - 6m/s
Accuracy: The greater of ±0.5% or 0.03m/s
Optimum installation: 45º optimum and mounted in the centre line of the channel with a clear uninterrupted view of the liquid surface
Level measurement: Compatible with up to dB6 transducer
Transmitter power: <15dBm
Beam width: 20º inclusive
Communication: RS485 and Modbus RTU - integrates with FlowCERT and Ultimate controller
PC Programming: Via RS485 Modbus
Programming security: Via passcode
Programming data integrity: Via non-volatile memory
PC setup and monitoring software: MicroFlow PC
Power consumption: 0.5W maximum