硒化氫H2Se氣體檢測管167S HYDROGEN SELENIDE 1-600ppm

Tube 67S
1. PERFORMANCE
1） Measuring range ：5-600 ppm 1-120 ppm
Number of pump strokes 1（100ml） 5（500ml）
2） Sampling time ：1.5 minutes/1 pump stroke
3） Detectable limit ：0.5 ppm（500ml）
4） Shelf life ：1 year
5） Operating temperature ：0～40℃
6） Reading ：Direct reading from the scale calibrated by 1 pump stroke
7） Colour change ：Pale yellow→Dark brown
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：10％　RSD-high：5％
3. CHEMICAL REACTION
By reacting with Gold chloride（III）, Colloidal gold is liberated.
H2Se＋AuCI3（III）→Au
4. CALIBRATION OF THE TUBE
STANDARD GAS CYLINDER METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
600
550
500
450
400
350
300
250
200
150
100
50
10
5
100ml
ppm
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167S HYDROGEN SELENIDE
Substance ppm Interference ppm Coexistence
Acetylene 3％ Higher readings are given.
Carbon monoxide 0.1％ 〃
Sulphur dioxide Pale blue stain is produced. 〃
Hydrogen sulphide 10 Brown stain is produced. 〃
Mercury vapours Similar stain is produced.
Arsine 〃10 〃
Iron carbonyl 〃10 〃
Nickel carbonyl 〃10 〃
（NOTE）
When the concentration is below 5 ppm, 5 pump strokes can be used to determine the lower concentration.
Following formula is available for the actual concentration.
Actual concentration＝1/5×Reading value