Auto Sash Controllers

TEL’s innovative auto sash controller for fume cupboards maximises energy savings and provides increased safety for the operator.

The auto sash controller is designed to close the sash automatically when the operator is not present in front of the fume cupboard. A passive infrared sensor (PIR) constantly monitors the work area in front of the fume cupboard. When the operator is present the sash can be operated manually via the optional Tiptronic touch-sensitive feature or using an optional foot switch. If no movement is detected and the sash opening is clear, the sash will automatically close after a pre-determined time. Auto open option is also available, and new for 2021 is the auto stop functionality which can be programmed to automatically stop the opening sash at the sash working height.


Product Benefits

Increased safety

Using an automatic sash closer increases the safety of your fume cupboard operators.

Energy and cost savings

Using an automatic sash closer will maximise and guarantee energy savings, reducing costs and carbon emissions.

Ease of Use

The upgraded controller features an easy-to-use, restructured menu, allowing users to quickly access specific functions.

Choosing the right model



The AFA4000 is a pioneering airflow controlling and monitoring system developed to ensure the safety of users, working with industrial and educational fume cupboards and biological safety cabinets. The AFA4000 airflow monitor and controller is available with optional Auto Sash integration.


Auto sash controller

Although preliminary designed for operation on VAV fume cupboards, it can also be used on CAV fume cupboards for increased safety. It can be fitted to new or existing fume cupboards with a choice of three motor drive systems to suit each type of fume cupboard.


Dual auto sash controller

A dual auto sash controller is also available to operate on fume cupboards with two sashes including walk in type, back to back type and side by side type sashes.

Case Studies for this product

Case Study

North Dakota Department of Health

The Phoenix exhaust system was getting old and managers questioned whether the 21 laboratories ever operated properly because the RTUs operated continuously at maximum capacity, and the work space was often too humid. Unfortunately a trial of installing extra fans had not been able to solve the supply/exhaust or humidity problems.

Case Study

Ohio State University

The CBEC (Chemical and Biomolecular Engineering and Chemistry) building at the Ohio State University was designed with the intention of earning a LEED (Leadership in Energy and Environmental Design) Sustainability Rating.  It was imperative that the building’s four-storey laboratory block featured an energy-efficient airflow infrastructure – TEL’s market-leading auto sash controllers were the ideal solution.

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