Gastec 130L 快速偏二氯乙烯测量探测管CH2：CCl2（0.4~40.6 ppm）

制造商: Gastec
Model: 130L
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技术规格
制造商消息

Indicator: 1 to 14 ppm
Measuring Range:
+ 0.4 to 1 ppm, Number of Pump Strokes 2
+ 1 to 14 ppm, Number of Pump Strokes 1
+ 14 to 40.6 ppm, Number of Pump Strokes 1/2 (45 seconds per of pumb stroke)
Sampling Time: 1.5 minute per pump stroke
Colour Change: Yellow → Reddish brown
Reaction Principle: CH2:CCl2 + Cr6+ + H2SO4 → HCl, HCl+ Base → Reddish brown product
Coefficient of Variation: 10% (for 1 to 4 ppm), 5% (for 4 to 14 ppm)
Nr. of tests: 5
Pump: GV-100S/110S

Details

Performance

Measuring Range

0.4 to 1 ppm

1 to 14 ppm

14 to 40.6 ppm

Number of Pump Strokes

Correction Factor

Sampling Time

1.5 minutes per pump stroke

45 seconds

Detecting Limit

0.1 ppm (n=2)

Colour Change

Yellow → Reddish brown

Reaction Principle

CH2:CCl2 + Cr⁶⁺ + H2SO4 → HCl
HCl+ Base → Reddish brown product

Coefficient of Variation

10% (for 1 to 4 ppm), 5% (for 4 to 14 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

Ethylene	≧ 300 ppm		No
Vinyl chloride	≧ 1/7	+	Reddish brown
Tetrachloroethylene	≧ 4 times	+	Reddish brown
Trichloroethylene	≧ 1/1	+	Reddish brown
Toluene	≧ 500 ppm		No
Benzene	≧ 400 ppm		No