- acetylene (C2H2)
- ammonia (NH3)
- argon (Ar)
- arsine (AsH3)
- carbon dioxide (CO2)
- carbon monoxide (CO)
- chlorine (Cl2)
- chlorine dioxide (ClO2)
- diborane (B2H6)
- ethylene oxide (C2H4O)
- helium (He)
- humidity (RH)
- hydrogen (H2)
- hydrogen chloride (HCl)
- hydrogen cyanide (HCN)
- hydrogen phosphide (PH3)
- hydrogen selenide (H2Se)
- hydrogen sulfide (H2S)
- liquefied petroleum gas (LPG)
- methane (CH4)
- nitrogen dioxide (NO2)
- nitrogen monoxide (NO)
- oxygen (O2)
- ozone (O3)
- phosgene (COCl2)
- propane (C3H8)
- silane (SiH4)
- sulfur dioxide (SO2)
- sulfur hexafluoride (SF6)
- temperature (T)
Selected substance/property: helium (He)
Threshold gas detectors
Devices indicating gas concentration exceeding pre-set threshold levels
Concentration-measuring gas detectors
Devices measuring gas concentration with an analogue output in the 4-20mA or/and 0-10V standard
