磷化氫PH3氣體檢測管121SC PHOSPHINE 20-1400ppm
Tube 21SC
1. PERFORMANCE
1） Measuring range ：40-1400 ppm 20-700 ppm
Number of pump strokes 1/2（50ml） （100ml）
2） Sampling time ：1 minute/1 pump stroke
3） Detectable limit ：10 ppm
4） Shelf life ：3 years
5） Operating temperature ：0～40℃
6） Reading ：Direct reading from the scale calibrated by 1 pump stroke
7） Colour change ：White→Yellow
2. RELATIVE STANDARD DEVIATION
RSD-low：10％ RSD-mid.：5％ RSD-high：5％
3. CHEMICAL REACTION
By reacting with Mercuric chloride（II）, Mercuric phosphorus chloride is produced.
PH3＋HgCI2＋H2O→Hg3P2?HgCI2?H2O
4. CALIBRATION OF THE TUBE
STANDARD GAS CYLINDER METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
700
600
500
400
300
200
100
50
20
ppm
100ml
GAS To pump
121SC PHOSPHINE
Substance Interference ppm Coexistence
Arsine Brown stain is produced. 30 Higher readings are given.
Hydrogen selenide 〃50 〃
Hydrogen sulphide 〃40 〃
（NOTE）
In case of 1 / 2 pump strokes, following formula is available for the actual concentration.
Actual concentration＝2×Reading value
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