| Index of target gases/substances : N |  |
| Gas
or Vapour to be Measured Chemical Formula |
Gastec
Tube No. & Name |
Measuring Range (ppm) |
No.of Pump Strokes |
Shelf Life (year) |
Note | TLV- TWA,C (ACGIH) (ppm) |
|
| Naphthalene C10H8 |
60 | Phenol | 0.5-14 | 2 | 2* | T | - |
| Nitric
acid HNO3 |
15L | Nitric acid | 20-40 | 1/2 | 3 | H | 2 |
| 1-20 | 1 | ||||||
| 0.1-1 | 2-10 | ||||||
| 80 | Acid gases | 5-100 | 2 | 2 | - | ||
| Nitroethane CH3CH2NO2 |
52 | Nitroparaffin (Pyrotectube) |
4-240 | 1 | 3 | - | 100 |
| Nitrogen
dioxide NO2 |
9L | Nitrogen dioxide | 30-125 | 1 | 3 | - | 3 |
| 0.5-30 | 2 | ||||||
| 10 | NO+NO2 | 2.5-200 | 1 | 3 | + | ||
| 80 | Acidgases | 0.2-4 | 2 | 2 | - | ||
| 52 | Nitroparaffin (Pyrotectube) |
0.5-30 | 1 | 3 | - | ||
| Nitric
oxide NO |
10 | NO+NO2 |
5-200 | 1 | 3 | +T | 25 |
| 2.5-5 | 2 | ||||||
| Nitrogen
oxides NO+NO2 |
11HA | Nitrogen oxides | 50-2500 | 1 | 2 | - | - |
| 11S | Nitrogen oxides | 250-625 | 1/2 | 2 | - | ||
| 10-250 | 1 | ||||||
| 5-10 | 2 | ||||||
| 11L | Nitrogen oxides | 5-16.5 | 1 | 3 | - | ||
| 0.2-5 | 2 | ||||||
| 0.08-0.2 | 4 | ||||||
| 0.04-0.08 | 8 | ||||||
| Nitromethane CH3NO2 |
52 | Nitroparaffin (Pyrotectube) |
5-300 | 1 | 3 | - | 20 |
| 1-Nitropropane CH3CH2CH2NO2 |
52 | Nitroparaffin (Pyrotectube) |
4.2-252 | 1 | 3 | - | 25 |
| 2-Nitropropane (CH3)2CHNO2 |
52 | Nitroparaffin (Pyrotectube) |
3.7-222 | 1 | 3 | - | 10 |
| Nitrotrichloromethane | See Chloropicrin | ||||||
| Nonane CH3(CH2)7CH3 |
105 | Hydrocarbons(HigherClass) | 260-3900 | 1 | 3 | - | 200 |
| 130-260 | 2 | ||||||
| T:Temp Correction | H:Humidity Correction | *:Refrigerator Store | Mesh:Correction Factor/Chart |