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  • 产品名称:甲醛气体检测管91D HCHO

  • 产品型号:91D
  • 产品厂商:日本GASTEC
  • 产品文档:
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简单介绍:
甲醛气体检测管91D HCHO,检测范围Measuring Range 0.1 to 20 ppm Sampling Hours 1 to 10 hours Detecting Limit 0.05 ppm (10 hours) 甲醛气体检测管价格,甲醛气体检测管91D HCHO
详情介绍:
甲醛气体检测管91D HCHO Formaldehyd                         No.91D
HCHO
甲醛气体检测管91D HCHO
Performance

Measuring Range

0.1 to 20 ppm

Sampling Hours

1 to 10 hours

Detecting Limit

0.05 ppm (10hours)

Color Change

Yellow → ReddishBrown

Reaction Principle

3HCHO +(NH2OH)3H3PO4 →H3PO4
H3PO4 + Base+Phosphate

Coefficient ofVariation

10% (for 1 to 20 ppm-hr)

ShelfLife1 Year
Correctionsfor
temperature & humidity
Unnecessary
Store the tubes inthe refrigerator to keep at 10oC (50oF) orbelow.


Possible coexisting substances and theirinterferences(NOTE)


 

Substance

Interference

Change colour byitself to

Aldehydes, Ketones,Acid gases

+

Reddishbrown


Othersubstance measurable with this detectortube

Substance

CorrectionFactor

SamplingTime

MeasuringRange

Acetaldehyde

1.0

1 to 10 hours

0.1 to 20 ppm

Furfural

3.0

1 to 10 hours

0.3 to 60 ppm

Methyl ethylketone

1.25

1 to 10 hours

0.125 to 25ppm




Calibration gasgenerationDiffusion tubemethod


 


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