Trichloroethane 50/d, 50 - 600 PPM, Part # CH21101, 5 Tests 

Application Range

Standard Measuring Range: 50 to 600 ppm

Number of Strokes n: 2 + 3 desorption strokes in clean air

Time for Measurement: approx. 1.5 min

Standard Deviation: ± 10 to 15 %

Color Change: grey š brown red

Ambient Operating Conditions

Temperature: 15 to 40 °C

Absolute Humidity: 5 to 15 mg H2O / L

Reaction Principle

a) 1,1,1-trichloroethane + IO3 –/H2S2O7 š Cl2

b) Cl2+ o-tolidine š brown red reaction product

Cross Sensitivity

Other chlorinated hydrocarbons are indicated, but with different sensitivities. In the presence of aromatic hydrocarbons the indication is too low (e.g. 200 ppm 1,1,1-trichloroethane and 200 ppm toluene, the reading amounts to 1/4 only, i.e. 50 ppm).