日本174D丁二烯檢測管1.56-240ppm

產(chǎn)品簡介：日本174D丁二烯檢測管1.56-240ppm

產(chǎn)品型號：174D

更新時(shí)間：2025-07-12

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日本174D丁二烯檢測管1.56-240ppm 產(chǎn)品介紹：

被動(dòng)擴(kuò)散式檢測管是用來測定較長時(shí)間下氣體濃度的時(shí)量平均值（TWA），采用自然擴(kuò)散的方式。這種檢測管里面填充有吸附劑及反應(yīng)劑，氣體以一定的速率被均勻吸附，從而出現(xiàn)較為明顯均勻的變色。檢測工作場所人員的有害氣體暴露量時(shí)，用右圖的檢測管夾（710）放置在人員衣領(lǐng)處即可。檢測有害氣體在工作場所的分布時(shí)，把該檢測管固定放置一段時(shí)間后就可檢測出來。也可用來進(jìn)行長時(shí)間的檢測。
特點(diǎn) 簡潔，輕巧，方便多用直接讀數(shù) 不需取樣設(shè)備圖例 A-切斷處 B-吸附劑 C-檢測劑	檢測管夾 No. 710

日本174D丁二烯檢測管1.56-240ppm

Performance

Measuring Range	1.3 to 200 ppm
Sampling Hours	1 to 8 hours
Detecting Limit	1.3 ppm (8 hours)
Colour Change	Reddish purple → Pale brown
Reaction Principle	CH2:CHCH:CH2 + MnO4 仺 Pale brown product
Coefficient of Variation	10% (for 10 to 200 ppmr)
Shelf Life	2 Years
Corrections for temperature & humidity	Temperature correction is necessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences (NOTE)

Substance

Interference

Change colour by itself to

Unsaturated hydrocarbons

Pale brown

Other substance measurable with this detector tube

Substance

Correction Factor

Measuring Range