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Related Articles詳細介紹
簡單介紹
1DL的詳細介紹
1DL
1DL，GASTEC1DL檢(jian)測范圍0.4 to 400 ppm，檢(jian)測管檢(jian)測時間(jian)在1-10小時(shi)左右。
1DL采用自然擴散的方式。其特點：簡潔，輕巧，方便多用、直接讀數、不需取樣設備。
被動擴散式檢測管是用(yong)來測定(ding)較(jiao)長(chang)時間下(xia)氣(qi)體濃度的時量平均值（TWA），采用(yong)自然擴散的方式。
這種(zhong)檢測管里面(mian)填充有吸附劑(ji)及(ji)反應(ying)劑(ji)，氣體以一定的速率被均(jun)(jun)勻吸附，從而(er)出現較為明顯均(jun)(jun)勻的變色
檢測工作場(chang)所人員的有(you)害氣體暴露量時，用(yong)右圖的檢測管夾（710）放置在人(ren)員衣領處(chu)即可。
檢(jian)(jian)測有害氣體在工作場所的分(fen)布時，把該(gai)檢(jian)(jian)測管固定(ding)放(fang)置一(yi)段(duan)時間后就(jiu)可檢(jian)(jian)測出來。也可用(yong)來進行更長(chang)時間的檢(jian)(jian)測
Carbon monoxide | DL |
| CO |
 |
Performance
| Measuring Range | 0.4 to 400 ppm | |
| Sampling Hours | 0.5 to 24 hours | |
| Detecting Limit | 0.2 ppm (24 hours) | |
| Colour Change | Pale Yellow → Brown | |
| Reaction Principle | CO + Na2Pd(SO3)2 → Pd + CO2 + SO2 + Na2SO3 | |
| Coefficient of Variation | 10% (for 10 to 200 ppm-hr) | |
| Shelf Life | 2 Years | |
| Corrections for temperature & humidity | Unnecessary | |
| Store the tubes in the refrigerator to keep at 10oC (50oF) or below. | ||
Possible coexisting substances and their interferences
| Substance | Concentration | Interference | Change colour by itself to |
| Nitrogen 倣onoxide | 亝 1/10 | No | No |
| Sulphur dioxide | 亝 1/1 | No | No |
| Nitrogen dioxide | 亝(qi) 1/20 | No | Brown |
| Calibration gas generation | High pressure gas cylinder method |
| TLV-TWA | TLV-S | Explosive range |
| 25 ppm | - | 12.5 to 74% 訂購 |
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