Gastec 3D 氨被动发现管NH3（2.5~1000 ppm）

制造商: Gastec
Model: 3D
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技术规格
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Indicator: 25~500 ppm
Measuring Range: 2.5 ~ 1000 ppm
Sampling Hours: 0.5 to10 hours
Colour Change: Purple → Yellow
Reaction Principle: 2NH3 + H2SO4 → (NH4)2SO4
Coefficient of Variation: 10% (25 ~ 500 ppm-hr)
Nr. of tests: 10

Details

Performance

Measuring Range	2.5 to 1000 ppm
Sampling Hours	0.5 to10 hours
Detecting Limit	0.5 ppm (10 hours)
Colour Change	Purple → Yellow
Reaction Principle	2NH3 + H2SO4 → (NH4)2SO4
Coefficient of Variation	10% (for 25 to 500 ppm-hr)
Shelf Life	3 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

Concentration

Interference

Change colour by itself to

Amines, Hydrazine		+	Yellow
Aromatic amines		No	No

Other substance measurable with this detector tube

Substance

Correction Factor

Sampling Time

Measuring Range

Dimethylamine	0.75	0.5 to 10 hours	1.9 to 750 ppm
N,N-Dimethylethylamine	1.6	0.5 to 10 hours	4 to 1600 ppm
Hydrazine	0.65	0.5 to 10 hours	1.6 to 650 ppm
Triethylamine	2.1	0.5 to 10 hours	5.3 to 2100 ppm