Calibration Range: 0.02-0.4 ppm
Measuring Range: 0.02-1.44 ppm
Sampling (flow) Rate: 200mL/min
Sampling Volume: 6000mL, 2000mL
Sampling Time: 30 min, 10 min
Colour Change: Yellow → pink
Nr. of tests: 10
Automatic Gas Sampler: GSP-300FT-2
Catalog
Specifications
| Calibration Range |
0.02-0.4 ppm |
| Measuring range |
0.02-1.44 ppm |
| Sampling (flow) Rate |
200mL/min |
| Sampling Volume |
6000mL, 2000mL |
| Sampling Time |
30min, 10min. |
| Detecting Limit |
0.01 ppm |
| Colour Change |
Yellow → pink |
| Corrections for temperature/humidity |
Temperature |
| Shelf life |
1 year (in the refrigerator) |
| Accuracy |
CV=5-10% (CV: Coefficient of variation = σ: standard deviation / mean value x 100) |
Possibly coexisting substances and their interferences
(NOTE)
| Substance(s) |
Interference |
Colour change by itself |
| Ammonia |
2 ppm (or less) |
No |
No |
| Nitrogen dioxide |
1 ppm (or less) |
No |
No |
| Acetaldehyde |
|
"+" error (higher reading) |
produces pinkish discolouration |
| Acetone |
0.3 ppm (or less) |
No |
Produces pinkish stain around tube opening (inlet) |
| Ethanol |
|
No |
No |
| Ethyl acetate |
|
No |
No |
| p-dichlorobenzene |
|
No |
No |
| Toluene |
|
No |
No |
Scrubber 1 (black): removes acetone Scrubber 2 (purple): Ammonia and nitrogen dioxide are removed. The presence of ammonia causes the purple scrubber 2 to turn yellow. The presence of nitrogen dioxide causes scrubber 2 to turn a darker shade of purple |
| Calibration gas generation |
Diffusion tube method (analysis: by absorptiometry, acetylacetone method) |
Miscellaneous
Electric sampling pump This detector tube is suited for measuring formaldehyde in indoor environments. The GSP-200 / GSP-300FT series automatic gas samplers (or comparable sampling devices/pumps) should always be used for optimal performance. A deviation of +/-10% in the sampling flowrate (i.e. amount of air flowing through the tube at a given moment) or the sampling amount (total sampled amount of target substance) causes an average margin of error of approx. +/-10% (maximum +/-20%) in the indicated value. Formaldehyde indoor concentration threshold: 0.08 ppm (mean value during 30 minutes) |
| TLV-TWA |
TLV-STEL |
Explosive range |
| -- -- |
C0.3ppm |
7.0。チ73% |