Sewer Flow Meter, non contact, Raven-Eye

The Raven-Eye  Non-Contact Area-Velocity Flowmeter

The Raven-Eye is an advanced, next-generation RADAR Flowmeter, suitable for River Flow Measurements, Sewer Flows, Flows to works and many others.

Flowline has been supplying and installing RADAR flowmeters for over 15 years. Many of these meters have been installed in drains and sewers and have never been serviced or even visited after installation...and they are still operating perfectly.

We can now offer a five-year warranty for the Raven-Eye! 

The Raven Eye is mounted above the water surface and measures the flow velocity using the radar technology and the flow depth using a level sensor (ultrasonic, radar or pressure). The flow rate is calculated by applying the continuity equation:  Q = V x A

Why non-contact area-velocity?

Because it's ideal for retro-fitting into existing channels or chambers without any civil works or flow shutdown.

Non-contact means, no routine cleaning needed, no ragging, no fouling, and because the sensor uses RADAR there are no lenses or mechanical moving parts inside.

Visit The Raven-Eye Micro-Site

Applications? We like to say "YES"!

Solar power, off-grid, web-enabled, Atex?  YES! 

Easy system integration, upgrading your CSO monitors to include flow?  YES!

Open Channel Flow Measurement YES!

Sewer Flow Measurement - ideal for surveys, no data "reconstruction" required. YES!

Effluent Discharge Measurement - perfect for factory discharge consent monitoring, hot flows, steamy chambers? YES!

Stream and River Flow Measurement YES

MCERTS? Undergoing certification now!

Installation, Service and Support

We can offer a full installation service, our trained, confined space qualified teams can carry out a complete installation service, ask us for details. 

We believe any product we sell should be fully supported by us, in the UK, no factory returns or long waits for service.

So we are happy to offer our customers the following support.

2 years warranty

Lifetime sensor exchange service: If you have a problem with a system we have installed, call us in normal working hours, we will ship you an exchange sensor for next day delivery, send yours back, we will check it and repair it in as soon as possible.

Raven-Eye namesake!

The "real" Raven-Eye! Find out more about our meters namesake by visiting 

Raven Haven is the UK's foremost experts on Ravens and a Raven rescue centre. If you can, help them with a contribution.
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Available Downloads

The following Downloads are available: