Draeger 6733081 Formaldehyde 0.2/a Detector Tubes (10 tests per box)

Application Range:

• Standard Measuring Range: 0.5 to 5 / 0.2 to 2.5 ppm
• Number of Strokes n: 10 / 20
• Time for Measurement: Approx. 1.5 min / 3 min
• Standard Deviation: ± 20 to 30 %
• Color Change: White → Pink

Ambient Operating Conditions:

• Temperature: 10 to 40 °C
• Absolute Humidity: 3 to 15 mg/ L

Reaction Principle:

• HCHO + C6H4(CH3)2 + H2SO4 → quinoid reaction products

Cross Sensitivity:

• Styrene, vinyl acetate, acetaldehyde, acrolein, diesel fuel and furfuryl alcohol are indicated with a yellowish brown discoloration.
• 500 ppm octane, 5 ppm nitric oxide and 5 ppm nitrogen dioxide have no effect.