Gastec 12L 气体检测管HCN（0.5~150ppm）

制造商: Gastec
Model: 12L
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技术规格
制造商消息

Indicator: 2.5 to 60 ppm
Measuring Range:
+ 0.5 to 1.25 ppm, Number of Pump Strokes 5, 45 seconds per pump stroke
+ 1.25 to 2.5 ppm, Number of Pump Strokes 2, 45 seconds per pump stroke
+ 2.5 to 60 ppm, Number of Pump Strokes 1, 45 seconds per pump stroke
+ 60 to150 ppm, Number of Pump Strokes 1/2, 30 seconds
Colour Change: Yellow →Pink
Coefficient of Variation: 10% (for 2.5 to 20 ppm), 5% (for 20 to 60 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Details

Performance

Measuring Range

0.5 to 1.25 ppm

1.25 to 2.5 ppm

2.5 to 60 ppm

60 to150 ppm

Number of Pump Strokes

Correction Factor

Sampling Time

45 seconds per pump stroke

30 seconds

Detecting Limit

0.1 ppm (n=5)

Colour Change

Yellow →Pink

Reaction Principle

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

Coefficient of Variation

10% (for 2.5 to 20 ppm), 5% (for 20 to 60 ppm)

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

Concentration

Interference

Change colour by itself to

Ammonia	2.5 ppm		No discolouration
Hydrogen chloride	5.0 ppm	+	Pink at 5.0 ppm
Nitric acid	10.0 ppm	+	Pink at 10.0 ppm
Sulphur dioxide	1.0 ppm	+	Pink at 0.8 ppm
Nitrogen dioxide	10.0 ppm	+	Pink at 8.0 ppm
Hydrogen fluoride	25.0 ppm	+	Pink at 21.0 ppm
Hydrogen sulphide	0.5 ppm	+	Pink at 0.5 ppm