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產(chǎn)品型號(hào)190U
品 牌
廠商性質(zhì)代理商
所 在 地上海市
更新時(shí)間:2024-11-27 18:27:15瀏覽次數(shù):1043次
聯(lián)系我時(shí),請(qǐng)告知來(lái)自 化工儀器網(wǎng)苯氣體檢測(cè)管118SB BENZENE 5-300ppm
室內(nèi)空氣甲醛檢測(cè)管No.713 FORMALDEHYDE 0.01-0
氯乙烯CH2=CHCl氣體測(cè)毒管132SC VINYL CHLORID
氯乙烯CH2=CHCl氣體檢知管132SB VINYL CHLORID
丁烯醛C2H5OCH2CH2OH檢測(cè)管190U ETHYL CELLOSOLVE 5-500ppm
Tube 90U
1. PERFORMANCE
1) Measuring range :5-500 ppm
Number of pump strokes 3(300ml)
2) Sampling time :4.5 minutes/3 pump strokes
3) Detectable limit :2 ppm
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 3 pump strokes
8) Colour change :Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:10% RSD-high:10%
3. CHEMICAL REACTION
Chromium oxide is reduced.
HOCH2CH2OCH3+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
5
20
50
100
150
200
300
400
500
ppm
300ml
GAS To pump
DEHUMIDIFIER
(White)
190U METHYL CELLOSOLVE
Substance Interference Coexistence
Alcohols Similar stain is produced. Higher readings are given.
Ethers 〃〃
Paraffin (morefi nth haynd Cro3c)arbons Whole reagent is changed to Brown. 〃
Aromatic hydrocarbons 〃〃
Esters 〃〃
Ketones 〃〃
Halogenated hydrocarbons FIG.1 〃〃
0
400
500
200
300
Trichloroethane〔ppm〕?
FIG.1 Influence of Trichloroethane
Methyl cellosolve indicating value 〔ppm〕
100 200 300 400 500 600
100
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 10℃ 15℃ 20℃ 25℃ 30℃ 35℃
(ppm) (50°F) (59°F) (68°F) (77°F) (86°F) (95°F)
500 800 620 500 410 335 265
400 620 490 400 325 260 200
300 450 365 300 245 195 145
200 290 245 200 160 125 95
150 215 185 150 120 90 70
100 145 125 100 80 60 45
50 75 65 50 40 30 25
20 30 25 20 15 12 10
5 10 7 5 4 3 2
(NOTE)
This tube scale is calibrated based on Ethyl cellosolve and the same scale is available for Methyl cellosolve.
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