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日本gastec 152D丁酮氣體檢測管2-600ppm

日本gastec 152D丁酮氣體檢測管2-600ppm 產(chǎn)品介紹：

被動擴(kuò)散式檢測管是用來測定較長時間下氣體濃度的時量平均值（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，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，把該檢測管固定放置一段時間后就可檢測出來。也可用來進(jìn)行長時間的檢測。
特點簡潔，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gastec 152D丁酮氣體檢測管2-600ppm

Performance

Measuring Range	2 to 600 ppm
Sampling Hours	1 to 10 hours
Detecting Limit	2 ppm (10 hours)
Colour Change	Yellow → Reddish Brown
Reaction Principle	3CH3COC2H5+ (NH2OH)3H3PO4 → H3PO4 H3PO4 + base → Phosphate
Coefficient of Variation	10% (for 20 to 600 ppm-hr)
Shelf Life	2 Years
Corrections for temperature & humidity	Temperature correction is necessary
Store the tubes in the refrigerator to keep at 10ºC (50ºF) or below.

Possible coexisting substances and their interferences (NOTE)

Substance

Concentration

Interference

Change colour by itself to

Aldehydes	+	Reddish brown
Ketones	+	Reddish brown
Acid gases	+	Reddish brown (Unclear demarcation)

Other substance measurable with this detector tube

Substance

Correction Factor

Measuring Range

Calibration gas generation

Diffusion tube method

TLV-TWA	TLV-STEL	Explosive range
200 ppm(2014)	300 ppm(2014)	1.7 to 11.4%