Many modern CO alarms have modern sensing technology to ensure safely operation for long periods of time.

Although many manufacturers use various techniques to interrogate the CO sensor to identify faults, this doesn't test the inside of the CO alarm, or if it is possible for gas to enter into the sensor area itself.

It is therefore our recommendation that CO alarms are tested externally at least once every 6 to 12 months with a suitable source of carbon monoxide gas.

There are a number of methods available. Some use a can of carefully measured CO gas whilst others use a slow burning substance to supply a more general concentration of CO.

For more information or free advice call:

0845 6039053