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Chemical Resistance of E+E Humidity Sensors
 

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

 

 MAC = Maximum Acceptable Concentration

 

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