Gastec 91P Detector tubes Gas or Vapour Formaldehyde HCHO (0.02-1.44 ppm)
ManufacturerGastec(View more products from this manufacturer)
Model91P
Contact
Secure Checkout
Quality Engagement
Easy change and return
Delivery Available
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
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% |
Stay Updated with Offers
Get exclusive volume discounts, bulk pricing updates, and new product alerts delivered directly to your inbox.
By subscribing, you agree to our Terms of Service and Privacy Policy.
Quick Support
Direct access to our certified experts