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)
Xylene
C6H4(CH3)2
123 Xylene 250-500 1/2 3 - 100
10-250 1
5-10 2
123L Xylene 100-200 1 3 -
2-100 2
100A LPG 0.1-1.2% 2 3 -
122L Toluene 100-200 1 3 -
4-100 2
2-4 4
T:Temp Correction H:Humidity Correction *:Refrigerator Store Mesh:Correction Factor/Chart


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