Chemical

Gas Concentration

Harmless

Negative Effect

carbon monoxide CO

up to 400 ppm

x

ammonia-NH₃

up to 500 ppm

x

sulphur dioxide-SO₂

up to 100 ppm

x

formaldehyde-HCHO

up to 10 x MAC

x

Freon 113- C₂Cl₃F₃

x

chlorine-Cl₂

up to 10 x MAC

x

hydrogen chloride-HCL

x

hydrogen fluoride-HF

x

nitrogen dioxide-NO₂

up to 20 x MAC

x

ethanol-CH₃CH₂OH
(liquid: for cleaning; gas: harmless)

x

methanol-CH₃OH
(liquid: for cleaning; gas: harmless)

x

ozone- O₃

up to 10 x MAC

x

ultraviolet rays (at 300-400 nm & 2 J/cm² / time of exposure: approx. 5 minutes)

Sensitive area of the sensor surface is protected by a metallic layer

x

Isopropanol-(CH₃)₂CHOH
(liquid: for cleaning; gas: harmless)

x

chlorine methane - CH₃CL

x

ethylene oxide-C₂H₄O

up to 15%

x

hydrogen peroxide H₂O₂

up to 10 x MAC

x