Formaldehyde Detection Tubes (2 to 100 ppm)
Formaldehyde with a Range of 2 to 100 ppm.
- Measuring Range:
- 2 to 20 ppm
- 20 to 50 ppm
- 50 to 100 ppm
- Number of Pump Strokes: 2, 1, 1/2
- Correction Factor: 1, 2.5, 5
- Sampling Time: 45 seconds per pump stroke
- Detecting Limit: 0.5 ppm (2 pump strokes)
- Changes from White to Brown
- Reaction Principle: HCHO + C6H4(CH3)2 + H2S2O7 → Condensation Polymer
- Relative Standard Deviation: 15% (for 2 to 6 ppm), 10% (for 6 to 20 ppm)
- 3 Year Shelf Life
- Store the tubes at cool and dark place.
- Comes in a Box of 5 pre tubes and 5 detector tubes
Possible coexisting substances and their interferences:
| Substance |
Concentration |
Interference |
Changes color by itself to |
| Aldehydes |
≧ 1/2 |
+ |
Brown |
| Styrene |
≧ 500 ppm |
+ |
Yellow |
| Esters, Ethers, Ketones |
≧ 1000 ppm |
+ |
No |
Formaldehyde Detection Tubes (2 to 100 ppm)
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