Item #: 8101751
MFG: Draeger

Formaldehyde 2/a (2 - 40 ppm)

For short-term measurements more than 160 Draeger-Tubes are available to measure the so-called spot concentrations of specific gases. A wide range of different gases and vapours can be detected and measured, e.g.: Determining and measuring concentration peaks, Measuring personal exposure in the inhalation area, Detecting leaks in pipelines, gas installations etc., and Air analysis in sewers, shafts and confined spaces.

Contains 10 tubes

Standard Measuring Range2 to 40 ppm
Number of Strokes (n)5
Time for Measurementapprox. 30 sec.
Standard Deviation±20 to 30 %
Colour Changewhite ─> pink
Temperature0 to 40° C
Absolute Humidity3 to 15 mg H2O / L
Reaction PrincipleHCHO + C6H4(CH3)2 + H2SO4 ─>
quinoid reaction products
Cross SensitivityStyrene, 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.
Additional InformationThe reagent ampoule must be broken
down before carrying out the