Sulphur Dioxide 1/a, 1 - 25 PPM, Part # CH31701, 10 Tests

Application Range

Standard Measuring Range: 1 to 25 ppm

Number of Strokes n: 10

Time for Measurement: approx. 3 min

Standard Deviation: ± 10 to 15 %

Color Change: grey blue š white

Ambient Operating Conditions

Temperature: 15 to 25 °C

Absolute Humidity: 3 to 20 mg H2O / L

Reaction Principle

SO2 + I2 + 2 H2O š H2SO4 + 2 HI

Cross Sensitivity

Hydrogen sulfide in the TLV range is retained in the pre-layer and does not interfere. Nitrogen dioxide will shorten the reading.