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產(chǎn)品型號121SC
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廠商性質(zhì)代理商
所 在 地上海市
更新時(shí)間:2024-11-20 15:44:51瀏覽次數(shù):1280次
聯(lián)系我時(shí),請告知來自 化工儀器網(wǎng)室內(nèi)空氣甲醛檢測管No.713 FORMALDEHYDE 0.01-0
氯乙烯CH2=CHCl氣體測毒管132SC VINYL CHLORID
氯乙烯CH2=CHCl氣體檢知管132SB VINYL CHLORID
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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