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  • 产品名称:甲醛检测管91 Formaldehyde HCHO

  • 产品型号:91
  • 产品厂商:日本GASTEC
  • 产品文档:
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简单介绍:
甲醛检测管91 Formaldehyde HCHO,Measuring Range 2 to 20ppm 20 to 50ppm 50 to 100ppm Number of Pump Strokes 2 1 1/2 Correction Factor 1 2.5 5 Sampling Time 1 minute per,甲醛检测管价格
详情介绍:

 

甲醛检测管91 Formaldehyde HCHO
Formaldehyde           No.91

HCHO

甲醛检测管91 Formaldehyde HCHO

Performance
 

Measuring Range

2 to 20ppm

20 to 50ppm

50 to 100ppm

Number of Pump Strokes

2

1

1/2

Correction Factor

1

2.5

5

Sampling Time

1 minute per pump stroke

Detecting Limit

0.5 ppm (n=2)

Color Change

White → Brown

Reaction Principle

HCHO + C6H4(CH3)2 + H2S2O7 → Condensation Polymer

Coefficient of Variation15% (for 2 to 6 ppm), 10% (for 6 to 20 ppm)
Shelf Life3 Years
Corrections for
temperature & humidity
Unnecessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences(NOTE)


Substance

Concentration

Interference

Change color by itself

Aldehydes

1/2 time

Plus error

Produce brown stain

Esters, Ethers

1000 ppm

Plus error

No discoloration

Ketones

1000 ppm

Plus error

No discoloration

Styrene

500 ppmPlus error

Yellow at 500 ppm



Other substance measurable with this detector tube


 
Calibration gas generationDiffusion tube method


 


TLV-TWATLV-STELExplosive range
-C 0.3ppm7.0 to 73%

 

Formaldehyde           No.91

HCHO

甲醛检测管91 Formaldehyde HCHO

Performance
 

Measuring Range

2 to 20ppm

20 to 50ppm

50 to 100ppm

Number of Pump Strokes

2

1

1/2

Correction Factor

1

2.5

5

Sampling Time

1 minute per pump stroke

Detecting Limit

0.5 ppm (n=2)

Color Change

White → Brown

Reaction Principle

HCHO + C6H4(CH3)2 + H2S2O7 → Condensation Polymer

Coefficient of Variation15% (for 2 to 6 ppm), 10% (for 6 to 20 ppm)
Shelf Life3 Years
Corrections for
temperature & humidity
Unnecessary
Store the tubes at cool and dark place.

Possible coexisting substances and their interferences(NOTE)


Substance

Concentration

Interference

Change color by itself

Aldehydes

1/2 time

Plus error

Produce brown stain

Esters, Ethers

1000 ppm

Plus error

No discoloration

Ketones

1000 ppm

Plus error

No discoloration

Styrene

500 ppmPlus error

Yellow at 500 ppm



Other substance measurable with this detector tube


 
Calibration gas generationDiffusion tube method


 


TLV-TWATLV-STELExplosive range
-C 0.3ppm7.0 to 73%
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