二氧化硫SO2氣體測毒管103SC SULPHUR DIOXIDE 20-300ppm

Tube 03SC
1. PERFORMANCE
1） Measuring range ：20-300 ppm
Number of pump strokes 1（100ml）
2） Sampling time ：1 minute/1 pump stroke
3） Detectable limit ：3 ppm
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 ：Purple→Yellow
2. RELATIVE STANDARD DEVIATION
RSD-low：10％　RSD-mid.：5％　RSD-high：5％
3. CHEMICAL REACTION
By reacting with alkali, PH indicator is discoloured.
SO2＋2NaOH→Na2SO3＋H2O
4. CALIBRATION OF THE TUBE
STANDARD GAS CYLINDER METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
300
250
200
150
100
50
20
ppm
SO2
GAS To pump
103SC SULPHUR DIOXIDE
Substance ppm Interference ppm Coexistence
Chlorine Similar stain is produced. SO2 FIG.1 ×2 1co/5nc. Higher readings are given.
Nitrogen dioxideFIG.2 100 Pink stain is produced. 〃〃
Hydrogen SulphFidIeG.3 SO×2 1c0o0nc. Lower readings are given.
Coexistence
Interference
0
300
200
250
100
150
50
Chlorine
FIG.1 Influence of Chlorine
Sulphur dioxide indicating value 〔ppm〕
50 100 150 200〔ppm〕? 0
300
200
250
100
150
50
Nitrogen dioxide
FIG.2 Influence of Nitrogen dioxide
Sulphur dioxide indicating value 〔ppm〕
10 20 30 40〔ppm〕? 0
300
200
250
100
150
50
Hydrogen sulfide
FIG.3 Influence of Hydrogen sulfide