Gastec 4LK Quick-measuring Detector tubes Hydrogen sulphide H2S

Manufacturer: Gastec
Model: 4LK
Origin: Japan
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Specifications
Manufacturer Info

Indicator: 2 to 20 ppm
Measuring Range:
+ 1 to 2 ppm, Number of Pump Strokes 2
+ 2 to 20 ppm, Number of Pump Strokes 1
+ 20 to 40 ppm, Number of Pump Strokes 1/2
Sampling Time: 1 minute per pump stroke
Colour Change: White → Brown
Reaction Principle: H2S + Pb(CH3COO)2 → PbS + 2CH3COOH
Coefficient of Variation: 10% (for 2 to 6 ppm), 5% (for 6 to 20 ppm)
Nr. of tests: 10

Details

Performance

Measuring Range

1 to 2 ppm

2 to 20 ppm

20 to 40 ppm

Number of Pump Strokes

Correction Factor

Sampling Time

1 minute per pump stroke

Detecting Limit

0.25 ppm (n=2)

Colour Change

White → Brown

Reaction Principle

H2S + Pb(CH3COO)2 → PbS + 2CH3COOH

Coefficient of Variation

10% (for 2 to 6 ppm), 5% (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

Mercaptans		No	No
sulphur dioxide	1/2	+	No
Nitrogen dioxide	1/4		No
Ozone	10 ppm	Bleaching	No

Calibration gas generation

Permeation tube method

TLV-TWA	TLV-STEL	Explosive range
1 ppm	5 ppm	4.0 to 44%

Quality Engagement
Easy change and return
Delivery Avaliable
Favorable payment

Manufacturer:	Gastec
Model:	4LK
Origin:	Japan

Gastec 4LK Quick-measuring Detector tubes Hydrogen sulphide H2S

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