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.
Direct access to our certified experts
Indicator: 20 to 250 ppm
Measuring Range:
+ 5 to 10 ppm, Number of Pump Strokes 2
+ 10 to 250 ppm, Number of Pump Strokes 1
+ 250 to 625 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Pale green
Reaction Principle: NO + Cr6+ + H2SO4 →NO2, NO2 + (C6H5)2NH → Pale green product
Coefficient of Variation: 10% (for 10 to 40 ppm), 5% (for 40 to 250 ppm)
Nr. of tests: 10
Pump: GV-100S/110S
| Measuring Range |
|
|||
| Number of Pump Strokes |
|
|||
| Correction Factor |
|
|||
| Sampling Time | 45 seconds per pump stroke | |||
| Detecting Limit | 2 ppm (n=2) | |||
| Colour Change | White → Pale green | |||
| Reaction Principle | NO + Cr6+ + H2SO4 →NO2 NO2 + (C6H5)2NH → Pale green product |
|||
| Coefficient of Variation | 10% (for 10 to 40 ppm), 5% (for 40 to 250 ppm) | |||
| Shelf Life | 2 Years | |||
| Corrections for temperature & humidity | Unnecessary | |||
| Store the tubes at cool and dark place. | ||||
| Substance | Concentration | Interference | Change colour by itself to |
| Hydrogen chloride | 50 ppm | Unclear demarcation | Bluish purple (10 ppm) |
| Ozone | 80 ppm | Unclear demarcation (two layers) |
Pale brown |
| sulphur dioxide, Hydrogen sulphide |
1/1 | + | No |
| Methanol | 400 ppm |  |
No |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| NO2: 0.2 ppm(2014) NO: 25 ppm(2014) |
- | - |
