丙烯CH2=CHCH3氣體檢測(cè)管185S PROPYLENE 50-1000ppm 返回列表頁(yè)

丙烯CH2=CHCH3氣體檢測(cè)管185S PROPYLENE 50-1000ppm

Tube 85S
1. PERFORMANCE
1） Measuring range ：50-1,000 ppm
Number of pump strokes 1（100ml）
2） Sampling time ：1.5 minutes/1 pump stroke
3） Detectable limit ：10 ppm
4） Shelf life ：2 years
5） Operating temperature ：10～40℃
6） Temperature compensation ：Necessary（See "TEMPERATURE CORRECTION TABLE"）
7） Reading ：Direct reading from the scale calibrated by 1 pump stroke
8） Colour change ：Yellow→Dark blue
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％
3. CHEMICAL REACTION
Molybdate is reduced and molybdeum blue is produced.
CH3CH＝CH2＋PdSO4＋（NH4）2MoO4→Mo3O8
4. CALIBRATION OF THE TUBE
STANDARD GAS CYLINDER METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
1000
900
800
700
600
500
400
300
200
100
50
ppm
GAS To pump
DEHUMIDIFIER
（White）
185S PROPYLENE
Substance ppm Interference ppm Coexistence
Carbon monoxide 45 Similar stain is produced. 200 Higher readings are given.
Acetylene Brown stain is produced. 50 〃
Ethyene Similar stain is produced. 〃
Hydrogen sulphide 10 Black stain is produced. 50 Double-layer stain is produced
and higher readings are given.
TEMPERATURE CORRECTION TABLE
Scale True Concentration （ppm）
Readings 10℃ 20℃ 30℃ 40℃
（ppm） （50°F） （68°F） （86°F） （104°F）
1,000 870 1,000 － －
800 760 800 900 1,000
600 540 600 660 720
400 380 400 420 440
200 200 200 200 200