Volumetric Controls

Our Volumetric Controller is designed to provide variable airflow volume control and ensure the safety of users working with industrial and educational fume cupboards and fume hoods.

The Volumetric Controller utilizes a bell mouth type venturi restrictor to accurately measure the extract volume of the fume cupboard and provides VAV control based on either sash position, programmable fixed set points or 0-10VDC analogue input. The controller can also operate using 3rd party orifice plates or other manufactured restrictor devices.

Product Benefits

Safety and compliance

Protecting your staff from potentially hazardous fumes and substances and ensuring you stay compliant.

Energy and cost savings

The TEL Volumetric Controller reduces the volume of air taken from the fume cupboard when it is not being used, reducing energy usage by up to 85%, considerably reducing costs.

Carbon emissions reduced

With many organisations having to meet carbon reduction targets, TEL’s Volumetric Controller reduces energy wastage, ensuring reductions in carbon emissions.

Choosing the right model


4NM Fumecupboard Actuator

Modulating damper actuator for adjusting dampers in technical building installations.


6NM SuperCap Actuator

Modulating SuperCap rotary actuator with emergency control function and extended functionalities for adjusting dampers in technical building installations and in laboratories.



The AFA1000/AHU model is a wall mounted pressure controller suitable for controlling the duct pressure of an AHU using an inverter drive.



The AFA1000/BLD is a wall mounted fresh air bleed controller suitable for controlling the VAV system duct pressure using a fresh air bleed damper or fan inverter drive.



The AFA1000/E is a digital airflow VAV controller available with a range of remote unique airflow sensors that are used to measure face velocities or duct velocities. The AFA1000/E is available fully flush (MK2) or semi flush (MK3).


AFA1000/E Dual Output

The AFA1000/E has a dual output allowing control of a secondary function such as Supply Air damper/inverter control or Fresh Air bleed damper control.



The AFA1000/RM model is a wall mounted room differential pressure controller suitable for controlling the supply air into a room using a damper, valve or inverter.



The AFA3000 VAV controller  has been specifically designed for Venturi Valve fume cupboard applications.

The controller will adjust the valve to the desired flow based on sash position. The mechanically pressure independent valve will accurately control and maintain design flows (as the system pressure/sash position changes). As the valve cannot detect changes in the face velocity of the fume cupboard , we incorporate one of our velocity sensors that will increase the flow of the valve if the face velocity drops below desired values.



The AFA4000/E is a pioneering airflow controlling system developed to ensure the safety of users, working with industrial and educational fume cupboards and biological safety cabinets.


ECON Damper

A precision engineered single blade butterfly damper designed for many years of maintenance free movement. The clear bodied design allows you to check for any debris caught on the internal blade.

Subscribe to our newsletter