Gastec 2A Airtec (Compressed Air) Detector Tube Carbon dioxide CO2(250 ~ 3000 ppm)
Manufacturer: Gastec Model: 2A - Request a Quotation
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Indicator: 250 ~ 3000 ppm
Measuring Range: 250 ~ 3000 ppm
Sampling Rate: 100mL/min(500mL)
Sampling Time: 5 minute
Colour Change: Orange Yellow → Yellow
Reaction Principle: CO2 + 2KOH → K2CO3 + H2O
Coefficient of Variation:
Nr. of tests: 10
Measuring Range | 250 to 3000 ppm |
Sampling Rate | 100mL/min(500mL) |
Correction Factor | 1 |
Sampling Time | 5 minutes |
Colour Change | Orange Yellow → Yellow |
Reaction Principle | CO2 + 2KOH → K2CO3 + H2O |
Coefficient of Variation | 10% (for 250 to 1000 ppm) , 5% (for 1000 to 3000 ppm) |
Shelf Life | 2 Years |
Corrections for temperature | Unnecessary for 0 to 40℃ |
Corrections for humidity | Unnecessary for R.H.0 to 90% |
Store the tubes at cool and dark place. |
Calibration gas generation | High pressure gas cylinder method |
TLV-TWA | TLV-STEL | Explosive range |
5000 ppm | 30000 ppm | - |
Measuring Range | 200 to 3000 ppm |
Sampling Rate | 100mL/min(150mL) |
Correction Factor | 1 |
Sampling Time | 1.5 minutes |
Colour Change | Pale blue → Purple |
Reaction Principle | CO2 + N2H4 → NH2NHCOOH |
Coefficient of Variation | 10% (for 200 to 1000 ppm) , 5% (for 1000 to 3000 ppm) |
Shelf Life | 3 Years |
Corrections for temperature | Unnecessary for 0 to 40℃ |
Corrections for humidity | Unnecessary for R.H.0 to 90% |
Store the tubes at cool and dark place. |
Calibration gas generation | High pressure gas cylinder method |
TLV-TWA | TLV-STEL | Explosive range |
5000 ppm | 30000 ppm | - |
Measuring Range | 500 to 5000 ppm |
Sampling Rate | 300mL/min(300mL) |
Correction Factor | 1 |
Sampling Time | 1 minutes |
Detecting Limit | 300ppm |
Colour Change | Green → Purple |
Reaction Principle | H2O + Mg(ClO4)2 → Mg(ClO4)2 H2O |
Coefficient of Variation | 10% (for 500 to 1000 ppm), 5% (for 1000 to 5000 ppm) |
Shelf Life | 2 Years |
Corrections for temperature | Unnecessary for 0 to 40℃ |
Store the tubes at cool and dark place. |
Calibration gas generation | Bubbling method |
Airtec tube - Compressed breathing air detector tubes
Measurement procedure:
1.Install a reducer pressure with gauge and flow metre to a cylinder, compressor or air line and adjust the flow metre the required setting. | ||
2.Break tips off a fresh detector tube in the tube tip breaker and insert a tube into a tube holder. | ||
3.Attach the rubber tube holder to the flow metre outlet. Make certain the tube arrowon the tube pointing in a down direction. | ||
4.Turn on the cylinder or compressor and confirm the flow metre according to each Airtec tube specifications. | ||
5.Time the flow rate with a stopwatch. | ||
6.As soon as sampling time has elapsed turn off the cylinder or compressor, and remove the tube from the tube holder and then read the colour change layer immediately. |
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