workflow in a busy commercial kitchen

Selecting the right Gas Interlock System


Choose from a complete Gas Interlock System installation system, a complete system less isolation gas valve or an interlock panel and an emergency stop only.

How does a gas interlock system work?

How to install a Gas Interlock System

The gas interlock panel should be mounted on a wall for easy access by all.

A main isolation solenoid valve should be connected to the gas interlock panel.

The minimum requirement is that the extraction fan is be connected to the interlock panel. This should be via a fan speed controller. The option of a inlet fan can also be connected to bring in the fresh air.

The gas interlock will monitor the fan speed or air differential pressure. If this is too low, it will shut the main gas valve to the cooking appliance.

A Co2 sensor can also be used to ensure the levels are within a pre-defined scope.

The gas interlock can also be connected to a separate BMS system. Should the BMS alarm go off, then it will close the main gas valve.

Below are some of the features and benefits of choosing our gas interlock system. These all come as standard with additional cost to the customer.


With a reduced footprint of only (W x L x D) 58 x 93 x 96mm, this is the smallest gas interlock panel/controller in the market today.


Very easy to set the required conditions with an easy step by step guide.


Current or Air sensing options can be selected as well as both from the same unit!


With a clear display of the status and conditions, it’s now easy to see what is actually happening.

Frequently asked questions

Can it be used for current or air sensing?

The same unit can be used for current sensing or air sensing via a compatible fan speed controller.

What fan amp load can they handle?

If using the built-in current sensors, then 0.5 to 15A. Air sensors have no limit.

Do you do fan speed controllers?

Yes, we do, we have 5A, 10A and 15A versions that can work with our gas interlock controllers.

Can it work with both current and air?

Our unit can be used with both current sensing and air sensing at the same time. E.g. extract fan current sensing and inlet fan air sensing.

Does it sense anything else?

It has inputs for Co2 and fire alarm sensing that will also close the main valve upon activation.


Clients testimonies

Hilary Leigh


“So easy to use and setup, the installation engineer found it very intuitive to use.”

Hall Read

Kitchen Manager

“We found Under Control Instruments very easy to work with, they told us all we needed to know to comply to BS6173”

Quintin Angus

Service Engineer

“We had looked at others but this overall had more features than others I had seen.”

Jack Tempest

Resturant Owner

“This was an upgrade from air sensing to current sensing. It solved the problem of air sensor pipe blockages.”