Gastec 91 Quick-measuring Detector tubes Formaldehyde HCHO (2~100ppm)

Name: Gastec 91 Quick-measuring Detector tubes Formaldehyde HCHO (2~100ppm)
Brand: Gastec

ຜູ້ຜະລິດGastec(ເບິ່ງສິນຄ້າອື່ນໆຂອງຍີ່ຫໍ້ນີ້)

Model91

ຕິດຕໍ່

ຈຳນວນ

ການຊຳລະເງິນທີ່ປອດໄພ

ການຮັບປະກັນຄຸນນະພາບ

ປ່ຽນ ແລະ ສົ່ງຄືນງ່າຍ

ມີບໍລິການຈັດສົ່ງ

Indicator: 2 to 20 ppm
Measuring Range:
+ 2 to 20 ppm, Number of Pump Strokes 2
+ 20 to 50 ppm, Number of Pump Strokes 1
+ 50 to 100 ppm, Number of Pump Strokes 1/2
Sampling Time: 45 seconds per pump stroke
Colour Change: White → Brown
Reaction Principle: HCHO + C6H4(CH3)2 + H2S2O7 → Condensation Polymer
Coefficient of Variation: 15% (for 2 to 6 ppm), 10% (for 6 to 20 ppm)
Nr. of tests: 10
Pump: GV-100S/110S

Catalog

Manual

Performance

Measuring Range

2 to 20 ppm

20 to 50 ppm

50 to 100 ppm

Number of Pump Strokes

1/2

Correction Factor

2.5

Sampling Time

45 seconds per pump stroke

Detecting Limit

0.5 ppm (n=2)

Colour Change

White → Brown

Reaction Principle

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

Coefficient of Variation

15% (for 2 to 6 ppm), 10% (for 6 to 20 ppm)

Shelf Life

3 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 colour by itself to

Aldehydes	1/2 time	+	Brown
Esters, Ethers	1000 ppm	+	No
Ketones	1000 ppm	+	No
Styrene	500 ppm	+	Yellow

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