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二氧化硫SO2氣體檢測管式檢測儀103SD SULPHUR DIOXIDE 1-60ppm,氣體檢測管是利用填充在玻璃管中的檢測劑與被測氣體發(fā)生化學(xué)反應(yīng)而發(fā)生顏色變化,通過觀察變色層的長度,得到被測氣體的濃度。在一定直徑的玻璃管內(nèi)緊密地裝填檢測劑,將兩端燒封,然后在玻璃管表面印制表示濃度的刻度,就制成了一支檢測管。檢測劑通過在硅膠或氧化鋁等物質(zhì)表面附著顯色試劑的方法所制成的。顯色試劑遇到被測氣體時,會發(fā)生特定反應(yīng),產(chǎn)生變色,這種檢測試劑具有相當?shù)姆€(wěn)定性。
更新時間:2024-11-20
在線留言二氧化硫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.
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