硫化氫H2S氣體檢測管120U HYDROGEN SULPHIDE 0.2-6.0ppm

Tube 20U

1. PERFORMANCE
1） Measuring range ：0.4-6.0 ppm 0.2-3.0 ppm
Number of pump strokes 1/2（50ml） 1（100ml）
2） Sampling time ：1 minute/1 pump stroke
3） Detectable limit ：0.05 ppm（100ml）
4） Shelf life ：2 years
5） Operating temperature ：0～40℃
6） Reading ：Direct reading from the scale calibrated by 1 pump stroke
7） Colour change ：Pale yellow→Pink
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％
3. CHEMICAL REACTION
By reacting with Mercury chloride（II）, Hydrogen chloride is produced and PH indicator is discoloured.
H2S＋HgCI2→HgS＋HCI
4. CALIBRATION OF THE TUBE
PERMEATION TUBE METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
3.0
2.5
2.0
1.5
1.0
0.5
0.2
100ml
ppm
（White）
DEHUMIDIFIER
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120U HYDROGEN SULPHIDE
Substance Interference Coexistence
Whole reagent is changed to Pale red,
Sulphur dioxide but Purplish red stain is indicated H2S
FIG.1 concentration.
Hydrogen selenide Similar stain is produced. Higher readings are given.
Arsine 〃〃
Mercaptans FIG.2 〃〃
Phosphine 〃〃
Hydrogen cyanide Whole reagent is changed to Red. 〃
Coexistence
Interference
0
2
3
1
Sulphur dioxide〔ppm〕?
FIG.1 Influence of Sulphur dioxide
Hydrogen sulphide indicating value 〔ppm〕
1 2 3 4 5
Coexistence
Interference
0
2
3
1
Ethyl mercaptan〔ppm〕?
FIG.2 Influence of Ethyl mercaptan
Hydrogen sulphide indicating value 〔ppm〕
（NOTE）
In case of 1 / 2 pump strokes, following formula is available for the actual concentration.
Actual concentration＝2×Reading value