Outfall Monitoring Systems including V-Notch Tanks & Weirs

An increasing number of companies are now rightly operating subject to stringent Environmental Agency imposed ‘consent to discharge’ licenses; to enable accurate, effective and recordable management this creates the need for outfall monitoring of their waste stream at the point of discharge.

A V-notch tank is often a convenient option for providing outfall monitoring, offering a platform for a number of parameters including pH, temperature and flow, amongst other things. The open nature of the tank allows easy access for sampling and visual monitoring of waste stream being discharged.

How a V-Notch Tank operates

The “V” referred to in the name of the tank reflects the shape of the weir on the tank outlet over which the water flows before being passed to drain, offering a precise water flow monitoring device. By using a standard angle for the V-notch, height of water across the weir can be measured and flow extrapolated. This provides an accurate way of measuring flow and if monitored using a calibrated and certified instrument can offer flow monitoring in compliance with the Environment Agency’s Monitoring Certificate Scheme (MCERTS).

V-Notch Tanks available from AllWater Technologies

AllWater Technologies Ltd offers a range of bespoke V-notch tanks and ultrasonic flow meters for monitoring a variety of water flow rates. Ancillary plant items are also available for monitoring additional discharge parameters including pH meters and temperature monitors.

Control options are also available offering historic trending of monitored outfall parameters and presentation of data for downloading to data stick or Building Management Systems (BMS) to facilitate report writing.

We also offer a range of automatic samplers which can be mounted adjacent to the V-notch tank and linked to the ultrasonic flow meter to provide flow proportional sampling. A number of sampler options can be offered, including refrigerated units.

All instruments offered by AWT are in compliance with local water authority requirements and are WRAS approved.