There is no official figure, however, 50 to 100 m2 per detector is a reasonable general guide, adding more detectors at points where leakage could occur. It must be remembered that gas has to contact a point-type detector to be detected.There are no precise rules or standards to follow when installing the gas detectors, it is important to consider the following: application for the detector, geometry of the room and airflows, the detected gas (toxic or flammable, can it replace oxygen, density), interfering factors (for example strong vibrations) and accessibility (for repairs and maintenance).For early leakage detection, install the sensor as close as possible to the potential leakage sources (flanges, valves, pressure reducers, pumps, etc). For general area monitoring without definite leakage sources, the detectors should be distributed evenly in the room. For personal safety control, the detectors are installed in the breathing zone (at the height of the head of people or animals).Please see the user manual of the specific gas detectors for further installation guidelines.