Application Range
Standard Measuring Range: 0.2 to 10 ppm
Number of Strokes n: 20
Time for Measurement: approx. 3 min
Standard Deviation: ±20 to 30%
Color Change: white -› yellow
Ambient Operating Conditions
Temperature: 10 to 40°C
Absolute Humidity: 5 to 15 mg H2O / L
Reaction Principle
CICOOR + 4-(4-nitrobenzyl)-pyridine ä yellow reaction product
Cross Sensitivity
Methyl, ethyl and isopropylchloroformate are indicated with approximately the same sensitivity. It is impossible to differentiate them. Petroleum hydrocarbons, aromatics, alcohols and ketones in
the TLV range do not affect the indication. It is impossible to measure chloroformate in the presence of phosgene.