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1DL的詳細介紹
1DL
1DL,GASTEC1DL檢測(ce)范圍0.4 to 400 ppm,檢(jian)(jian)測管檢(jian)(jian)測時間在(zai)1-10小時(shi)左右(you)。
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來測定較長(chang)時(shi)間下氣體(ti)濃度的(de)時(shi)量平均值(TWA),采用(yong)自(zi)然(ran)擴散的方式(shi)。
這種(zhong)檢(jian)測管(guan)里面填充有吸附劑(ji)及反(fan)應劑(ji),氣體以一定的(de)(de)速(su)率被(bei)均勻吸附,從而出現較(jiao)為(wei)明(ming)顯均勻的(de)(de)變(bian)色
檢測(ce)工作場所人員的(de)(de)有害(hai)氣體暴露量時,用右圖的(de)(de)檢測(ce)管(guan)夾(710)放置在人員衣領處(chu)即可。
檢(jian)測(ce)(ce)有害氣(qi)體在工作場(chang)所的(de)分布時(shi),把該(gai)檢(jian)測(ce)(ce)管固(gu)定(ding)放置一段時(shi)間后就可檢(jian)測(ce)(ce)出來。也可用來進行更長時(shi)間的(de)檢(jian)測(ce)(ce)
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(fang)onoxide | 亝 1/10 | No | No |
Sulphur dioxide | 亝 1/1 | No | No |
Nitrogen dioxide | 亝 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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