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
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: 2.5 to 200 ppm (NO2), 5 to 200 ppm (NO)
Measuring Range:
+ 2.5 ~ 5 ppm (NO), Number of Pump Strokes 2
+ 5 ~ 200 ppm (NO), Number of Pump Strokes 1
+ 5 ~ 200 ppm (NO2), Number of Pump Strokes 1
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Yellowish orange
Reaction Principle:
+ NO2 tube: NO2 + o-Tolidine → Yellowish orange product
+ NO tube:NO + Cr6+ + H2SO4 →NO2, NO2 + o-Tolidine → Yellowish orange product
Coefficient of Variation:
+ NO2 tube: 10% (for 2.5 to 20 ppm), 5% (for 20 to 200 ppm)
+ NO tube:10% (for 5 to 20 ppm), 5% (for 20 to 200 ppm)
Nr. of tests: 5
Pump: GV-100S/110S
| Name of Gas |
|
|||
| Measuring Range |
|
|||
| Number of Pump Strokes |
|
|||
| Correction Factor |
|
|||
| Detecting Limit |
|
|||
| Sampling Time | 45 seconds per pump stroke | |||
| Colour Change | White → Yellowish orange | |||
| Reaction Principle | NO2 tube: NO2 + o-Tolidine → Yellowish orange product NO tube: NO + Cr6+ + H2SO4 →NO2 NO2 + o-Tolidine → Yellowish orange product |
|||
| Coefficient of Variation | NO2 tube: 10% (for 2.5 to 20 ppm), 5% (for 20 to 200 ppm) NO tube:10% (for 5 to 20 ppm), 5% (for 20 to 200 ppm) |
|||
| Shelf Life | 3 Years | |||
| Corrections for temperature & humidity | NO2 tube:Unnecessary NO tube:Temperature correction is necessary |
|||
| Store the tubes at cool and dark place. | ||||
| Substance | Concentration | Interference | Change colour by itself to |
| Nitric Oxide | No | Red(entrance of the detecting layer) | |
| Hydrogen chloride | Unclear demarcation | No | |
| Ozone, Halogens, Chlorine dioxide |
1/5 | +20% | Yellowish orange |
| Sulphur dioxide | 50 ppm | Unclear demarcation | No |
| Substance | Concentration | Interference | Change colour by itself to |
| Hydrogen chloride | No | No | |
| Ozone, Halogens, Chlorine dioxide | No | No | |
| Sulphur dioxide | No | No | |
| Nitrogen dioxide | No | No |
| Calibration gas generation | Permeation tube method |
| TLV-TWA | TLV-STEL | Explosive range |
| NO2: 0.2 ppm(2014) NO: 25 ppm(2014) |
- | - |
