日本GASTEC 甲胺CH3NH2檢測管3DL

詳細(xì)介紹

甲胺CH3NH2檢測管3DL
甲胺CH3NH2檢測管3DL，GASTEC甲胺CH3NH2檢測管3DL檢測范圍1-10ppm，檢測管檢測時(shí)間在1-10小時(shí)左右。甲胺CH3NH2檢測管3DL 采用自然擴(kuò)散的方式。甲胺CH3NH2檢測管3DL其特點(diǎn)：簡潔，輕巧，方便多用、直接讀數(shù)、不需取樣設(shè)備。

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)行更長時(shí)間的檢測

Ammonia

NO.3DL

NH3

Performance

Measuring Range	0.1 to 10 ppm
Sampling Hours	1 to10 hours
Detecting Limit	0.02 ppm (10 hours)
Colour Change	Pink → Yellow
Reaction Principle	2NH3 + H2SO4 → (NH4)2SO4
Coefficient of Variation	10% (for 1 to 10 ppm-hr)
Shelf Life	2 Years
Corrections for temperature & humidity	Temperature and Humidity correction is necessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences

Substance

Concentration

Interference

Change colour by itself to

Amines		+	Yellow
Hydrazine		+	Yellow

Other substance measurable with this detector tube

Substance

Correction Factor

Sampling Time

Measuring Range

Methyl amine	1.9	0.19 to 19 ppm	1 to 10 hours
Trimethyl amine	2.3	0.23 to 23 ppm	1 to 10 hours

Calibration gas generation

Permeation tube method

TLV-TWA	TLV-S	Explosive range
25 ppm	35 ppm	15 to 28%

日本GASTEC 甲胺CH3NH2檢測管3DL

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