二氧化硫SO2氣體檢測管式檢測儀103SD SULPHUR DIOXIDE 1-60ppm

Tube 03SD
1. PERFORMANCE
1） Measuring range ：1-60 ppm
Number of pump strokes 1（100ml）
2） Sampling time ：1 minute/1 pump stroke
3） Detectable limit ：0.5 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 ：Pink→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
PERMEATION TUBE METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
60
50
40
30
20
10
5
1
ppm
SO2
GAS To pump
103SD SULPHUR DIOXIDE
Substance ppm Interference ppm Coexistence
Chlorine Pale pink stain is produced. SO2 ×c2onc. Higher readings are given.
SO2 conc. The top of discoloured layer
Nitrogen dioxide 20 〃×1 becomes un clear and higher
readings are given.