Catalytic Gas Sensors detect all combustible Gases in the Range of 0 – 100 % LEL

Statox 501 HRC and Statox 501 ARE give the perfect answer to almost any problem in the detection of flammable gases. Both detect combustible gases in the range of 0 – 100 % LEL.

How does a catalytic sensor work?
It consists of two beads, of which one covered with a catalyst. Both beads are heated to roughly 400°C. As soon a combustible gas comes in contact with the catalyst, it will be burned, while other bead compensates for metereological parameters such as temperature and wind speed. This combustion process on the catalytic bead increases the temperature of it, and thus its electrical resistance. The electrical resistance is an easy to measure parameter.
Consequently the sensor heads are of simple design and economically priced.

The catalyst oxidizes almost any combustible substance – unfortunately not with the same sensitivity. Therefore Compur Monitors offers two different types: The HRC is best for gases (Methane, Butane, Propane etc.) and the ARE type is best for solvents and fuels (Gasoline, Acetone etc.)

To operate these sensors, you need the Statox 501 control module. It displays the measured value and generates alarms with three powerful relays (max. 2 A), who can activate flash lights, beacons or ventilators.

These two items – control module and sensor head form a complete gas detection system. Life can`t be easier!

There is one restriction with the use of catalytic sensors: Catalyst poisons might destroy the catalyst. If you have catalyst poisons present in your plant, an infrared system, like Statox 501 IR or Statox MC IR might be the better alternative.