This system has now been superseded by the SEC-B.

Gas detection and pressure proving system.

The APS-3 gas detection and gas pressure proving system has been designed for use in boiler houses and plant rooms.

Low voltage sensors for the detection of natural gas, LPG or carbon monoxide are connected to the panel that will alarm and close the electric control valve in the event of dangerous levels being detected.

The APS-3 is also a gas pressure proving system so that the IGE/UP/1A Edition 2 standard can be complied with. This ensures that there are no gas leaks before the control valve is opened after closure for any reason.

Under HSE document PM5 and BS5885, the APS-3 can auto reset after an electricity supply failure when used in boiler room applications. For industrial applications the APS-3IN must be used as this model does not auto-reset in keeping with the industrial standards.

If you require further information about this product please call us on 0161 233 0600 or email at enquiries@medem.co.uk and we’ll be more than happy to help.




This product is no longer available. If you need assistance with an already installed unit, please get in touch and we’ll help.


All our products come with a 5-year warranty
Medem’s industry leading five-year warranty is a demonstration of the company’s confidence in the quality and design of its products.
This applies to the main panels and sender units, gas detectors carry a 2-year warranty.

Why not let us install your system and receive a 10-year Warranty?
Where we’ve commissioned an installed system, the warranty is extended from five to ten years. At the time of commissioning, photos and gas pressure readings are recorded along with other relevant details of the installation. A 24-hour helpline number and the serial number is attached with the panel and all details are then entered on to the Medem database.