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  • 产品名称:苯气体检测管121S Benzene C6H6

  • 产品型号:121S
  • 产品厂商:日本GASTEC
  • 产品文档:
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简单介绍:
苯气体检测管121S Benzene C6H6,Measuring Range 2 to 5 ppm 5 to 120 ppm 120 to 312 ppm Number of Pump Strokes 4 2 1 Correction Factor 0.4 1 2.6 Sampling Time 2 minutes per pump stroke Detecting Limit苯气体检测管价格
详情介绍:

 

苯气体检测管121S Benzene C6H6
Benzene                        No.121S

C6H6

苯气体检测管121S Benzene C6H6

Performance
 

MeasuringRange

2 to 5 ppm

5 to 120 ppm

120 to 312 ppm

Number of PumpStrokes

4

2

1

CorrectionFactor

0.4

1

2.6

Sampling Time

2 minutes per pumpstroke

Detecting Limit

0.5 ppm (n=4)

Color Change

White → Darkgreen

Reaction Principle

C6H6 + I2O5 + H2S2O7 → I2

Coefficient ofVariation20% (for5 to 40 ppm), 15% (for 40 to 120 ppm)
ShelfLife3Years
Correctionsfor
temperature & humidity
Unnecessary
Store the tubes at cool and darkplace.

Possible coexisting substances and theirinterferences(NOTE)


Substance

Concentration

Interference

Change color by itself

Hexane

100 ppm

No effect

No discoloration

Toluene

200 ppm

No effect

No discoloration

Xylene

300 ppm

No effect

No discoloration

Aromatichydrocarbons other than benzene are trapped in the brown layer inthe pretreatment tube.If the pretreatment reagent is entirelyconsumed (whole brown layer turns to dark brown),ahigher reading will be given.



Calibration gasgenerationDiffusion tubemethod



TLV-TWATLV-STELExplosive range
0.5ppm2.5ppm1.3 to 7.1%
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