Drager Detection Tubes - Formaldehyde 0.2/a (Pack of 10)
These Formaldehyde short-term gas detection tubes from Drager have a measurement range of 0.2 to 5 ppm (0.2/a). Other substances detected included
Acetaldehyde, Buten-2-al, n-Butyraldehyde, Crontonaldehyde, 1,3-Dioxolan, Formaldehyde, Furfural and Vinyl Acetate.
The tubes have a shelf life of 2 years and come in a pack of 10 tubes.
- Hard-to-reach and on-the-spot measurements can be carried out using the tubes, pump and accessories
- Obtain measurements within 10 seconds to 15 minutes (depending on the type of tube)
- Pre-entry checks, confined space entry, variations in concentration levels in the workplace and contamination of breathing zones are possible applications which may use tubes
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 / approx. 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. | |
Extension of the Measuring Range | |
The measuring range can be extended in conjunction with the activation tube (Order No. 81 01 141). The following information applies to the n = 20 stroke scale: Pump Strokes Scale divided by Range 40 2 0.1 to 1.25 ppm 80 4 0.05 to 0.63 ppm 100 5 0.04 to 0.5 ppm |