Flow monitoring

Explore by meter type

Our flow meter types

We have designed a suite of instruments to measure flow in open channels, closed pipe and area velocity options.


Our open channel ultrasonic flow meters integrate our digison ultrasonic sensors with our USI and USM meters


Using a Magflow sensor, our closed pipe flow meters can be used with an integral screen or USI meter


Integrating our USI and USM meters with our area velocity Doppler sensor for effective area velocity flow meters

Why measure flow in water and wastewater?

Usually, the main driver for flow monitoring in wastewater is for billing purposes. A trade effluent bill uses the flow and other water quality parameters to calculate what you owe. The water company is required by law to use your readings, as long as they are from an approved measurement type.

Other reasons to measure flow may be during the manufacturing process in industrial applications, for wastewater treatment plant automation or for flow volume based sampling in a wastewater sampler.


Two plug and play options for flow meters - both designed and manufactured in the UK

Request a call back


Flow meter

Universal Smart Instrument

Multi parameter conductivity meter for measuring conductivity in water and wastewater
  • Up to 2 flow and 2 water quality parameters
  • 7″ touch screen display
  • Windows operating system
  • Live data interrogation
  • Multi-output

Watch the USI video


Flow meter

Universal Smart Meter

  • Cost-effective meter
  • Multi-function instrument
  • Quick and simple programming
  • The UK manufactured
  • Robust and effective

Watch our USM video

Measuring flow in closed pipes with the Sonic Driver Pocket-UFM

The Pocket-UFM from Sonic Driver is an innovative handheld clamp-on ultrasonic flowmeter that truly fits in the pocket. Because clamp-on meters require no cutting of the pipe to install them and have no effect on the flow in the pipe they are a preferred method for the measurement of liquid flow in closed pipes. The meter incorporates heat quantity measurement and wall thickness measurement functionality as standard.

Explore our other products

Click on a category for more details.

Water Quality

Our range of water quality instruments offer simultaneous multi-parameter measurement and are ideal for industrial and municipal applications.


Intelligent flow monitoring – we manufacture a range of instruments to measure flow in industrial and municipal applications.


Our level meters utilise our own ultrasonic technology and offer a degree of intelligence and ease of programming not seen in other instruments.

Wastewater Samplers

Our range of wastewater samplers are specifically designed for the composite collection of wastewater samples in industrial and municipal applications.

Sludge Blanket

Our Avocet Sludge Blanket monitors the sedimentation and scum accumulation in remote settlement tanks and clarifiers in water treatment works.


We offer a wide variety of sensors for flow, level and water quality measurement. Durable in design and accurate in industrial and municipal applications.

Weirs & Flumes

Our v-notch weir tanks and flumes are fully compliant to BS3680 and ISO 1438 standards and can be made bespoke for each application.

Would you like to find out more?

Get in touch