Draeger 8103601 Hydrocyanic Acid 0.5a Detector Tubes (10 tests per box)

Application Range:

• Standard Measuring Range: 0.5 to 5 ppm / 5 to 50 ppm
• Number of Strokes n: 10 / 2
• Time for Measurement: Approx. 2.5 min / CA. 0.5 min
• Standard Deviation: ± 10 to 15 %
• Color Change: Yellow → Red

Ambient Operating Conditions:

• Temperature: 0 to 40 °C
• Absolute Humidity: < 40 mg H2O / L

Reaction Principle:

• a) HCN + HgCl2 ä HCl
• b) HCl + methyl red → red reaction product

Cross Sensitivity:

• 30 ppm hydrogen sulfide, 300 ppm ammonia, 40 ppm sulfur dioxide, 20 ppm nitrogen dioxide and 1,000 ppm hydrogen chloride do not affect the indication.
• Hydrogen sulfide causes the pre-layer to discolor to dark brown.
• Ammonia concentrations above 300 ppm can cause the indication at the beginning of the indicating layer to discolor back to yellow.
• Acylonitrile up to a concentration of 1,000 ppm does not affect the indication.
• It is impossible to measure hydrocyanic acid in the presence of phosphine.