Gastec 4LT 硫化氢气体检测毒管快速H2S检知管H2S（0.1-4 ppm）

制造商: Gastec
Model: 4LT
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技术规格
制造商消息

Indicator: 0.2~2.0ppm
Measuring Range:
+ 0.05 to 0.1 ppm, Number of Pump Strokes 2
+ (0.1) to 2.0 ppm, Number of Pump Strokes 1
+ 2.0 to 4.0 ppm, Number of Pump Strokes 1/2
Sampling Time: 1.5 minute per pump stroke
Colour Change: Yellow →Pink
Coefficient of Variation: 5% (for 0.1 to 2.0 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Details

Performance

Measuring Range

0.05 to 0.1 ppm

(0.1) to 2.0 ppm

2.0 to 4.0 ppm

Number of Pump Strokes

Correction Factor

Sampling Time

1.5 minutes per pump stroke

Detecting Limit

0.01 ppm (n=2)

Colour Change

Yellow →Pink

Reaction Principle

Hydrogen Sulphide reacts with the reagent to form intermediate material which stains indicator pink

Coefficient of Variation

5% (for 0.1 to 2.0 ppm)

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 (NOTE)

Substance

Concentration

Interference

Change colour by itself to

Ammonia	2.3 ppm		No discolouration
Ethyl Mercaptan	0.5 ppm	+	Pink at 0.4 ppm
Hydrogen Chloride	4.5 ppm	+	Pink at 4.0 ppm
Hydrogen Cyanide	0.05 ppm	+	Pink at 0.05 ppm
Nitric Acid	6.0 ppm	+	Pink at 5.0 ppm
Sulphur Dioxide	10times	+(dual layer)	Pale pink at 2.0 ppm
Nitrogen Dioxide	5times		Pink at 6.5 ppm
Hydrogen Fluoride	12.0 ppm	+	Pink at 11.0 ppm