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产品简介
产品介绍
二氧化碳CO2检测管126SH CARBON DIOXIDE 1-20%
Tube No.
1. PERFORMANCE
1） Measuring range ：1-20％
Number of pump strokes 1（100ml）
2） Sampling time ：1 minute/1 pump stroke
3） Detectable limit ：0.2％
4） Shelf life ：2 years
5） Operating temperature ：0～40℃
6） Reading ：Direct reading from the scale calibrated by 1 pump stroke
7） Colour change ：Pink→Yellow
2. RELATIVE STANDARD DEVIATION
RSD-low：5％ RSD-mid.：5％ RSD-high：5％
3. CHEMICAL REACTION
By reacting with alkali, PH indicator is discoloured.
CO2＋2KOH→K2CO3＋H2O
4. CALIBRATION OF THE TUBE
STANDARD GAS CYLINDER METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
%
12
4
6
8
10
12
14
16
18
20
GAS To pump
126SH CARBON DIOXIDE
Substance ppm Interference ppm Coexistence
Similar stain is produced,but if there
Nitrogen dioxide FIG.1 50 White stain is produced. 50 is more than 3％of CO2,the accuracy
of readings is not affected.
Sulphur dioxide FIG.2 3,000 Similar stain is produced. 3,000 Higher readings are given.
Hydrogen sulphide FIG.3 4,000 〃3,000 〃
0
10
5
Sulphur dioxide〔ppm〕�
FIG.2 Influence of Sulphur dioxide
Carbon dioxide
indicating value 〔％〕
2000 4000 6000
Coexistence
Interference
0
10
5
Nitrogen dioxide〔ppm〕�
FIG.1 Influence of Nitrogen dioxide
Carbon dioxide
indicating value 〔％〕
500 1000
Coexistence
Interference
0
10
5
Hyrogen sulphide〔ppm〕�
FIG.3 Influence of Hydrogen sulphide
Carbon dioxide
indicating value 〔％〕
2000 4000 6000
Coexistence
Interference
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