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 |
- |
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:
(Chloropicrin
Cl3CNO2) |
134 |
Carbon
tetrachloride |
2.5-60 |
1 |
1* |
+ |
0.1 |
Nonane
CH3(CH2)7CH3 |
105 |
Hydrocarbons(HigherClass) |
260-3900 |
1 |
3 |
- |
200 |
| 130-260 |
2 |
Gastec Tubes and
Sampling Pump
