It began in Poole, Dorset in the United Kingdom where it still has a base today, starting as EIC-Sieger in 1959 and rebranded to J&S Sieger Ltd in 1961. The founder was Joshua Sieger who invented the first low-power catalytic bead sensor immune to cross-sensitivity and named it Mark 9, designed for use on boats. At the time, few companies offered gas detection solutions and those that did mainly targeted mining.
A fixed gas detector is permanently installed to provide continuous monitoring of plant and equipment emissions and ensure the safety of personnel along with assets. Preemptively warning of flammable, toxic gas and vapour release or Oxygen depletion. Detectors can be installed indoors or outside. Typically equipped with sensors, although some monitors use ultrasonic acoustic microphones for leakage detection, as they are unaffected by wind and weather.
Calibration times vary dependent on sensors, expired time and usage. For the gas detector pictured left (standard 4 gas monitor LEL, CO, H2S, O2), the recommended calibration period is every six months.