水蒸汽H2O氣體檢知管177UR WATER VAPOUR 2-12LB/MMCF

1. PERFORMANCE
1） Measuring range ：2-12 LB/MMCF
Number of pump strokes 2（200ml）
2） Sampling time ：2 minutes/2 pump strokes
3） Detectable limit ：1 LB/MMCF
4） Shelf life ：3 years
5） Operating temperature ：0～35℃
6） Temperature compensation ：Necessary（See "TEMPERATURE CORRECTION TABLE"）
7） Reading ：Direct reading from the scale calibrated by 2 pump strokes
8） Colour change ：Yellow→Yellowish green
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：10％　RSD-high：10％
3. CHEMICAL REACTION
H2O＋Mg（ClO4）2→Mg（ClO4）?H2O
4. CALIBRATION OF THE TUBE
DIFFUSION TUBE METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
12
10
8
6
4
2
H2O
LB/MMCF
Tube No.
177UR WATER VAPOUR
Substance Interference Coexistence
Alcohols Similar stain is produced. Higher readings are given.
Benzene The accuracy of readings is not affected.
Toluene 〃
Hexane 〃
Sulphur oxide 〃
Hydrogen sulphide 〃
TEMPERATURE CORRECTION TABLE
Temperature；To correct for temperature, multiply the tube reading by the following factors.
Temperature（℃） 0 1 2 3 4 5 6 7 8 9
Correction Factor 1.69 1.65 1.61 1.57 1.53 1.50 1.46 1.42 1.39 1.35
Temperature（℃） 10 11 12 13 14 15 16 17 18 19
Correction Factor 1.32 1.28 1.25 1.22 1.19 1.15 1.12 1.09 1.06 1.03
Temperature（℃） 20 21 22 23 24 25 26 27 28 29
Correction Factor 1.00 0.98 0.95 0.92 0.90 0.87 0.85 0.82 0.80 0.78
Temperature（℃） 30 31 32 33 34 35
Correction Factor 0.75 0.73 0.71 0.69 0.67 0.65