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GAS6L Water Vapour Gastec Detector Tubes 0.05 - 2mg/l

SKU: GAS6L

GAS6L 


Next Working Day Delivery - When Ordering Gastec Tubes from a1-cbiss, we aim to deliver to your site for the next working day.


Large UK Stock Holding - 95% of our Gastec Detector Tubes are held in stock so our delivery times are quick


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Excl. VAT: £28.50 Incl. VAT: £34.20
Excl. VAT: £28.50 Incl. VAT: £34.20

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Product Description

Details

GAS6L Water Vapour (H2O) Standard Gastec Detector Tubes

Gas detector tubes are glass tubes that are filled with chemical reagent that absorbs and reacts with the target gas or vapour being measured.

A colorimetric stain (a colour change) is created. For most tubes, the concentration is read directly from the pinpoint accurate measurement scale on each tube.

This makes this form of monitoring ideal for spot sampling as it can be more accurate then electronic gas detectors.

The Gastec detector tube system is comprised of a handheld Gastec air sampling pump and Gastec detector tubes.

Performance

Measuring Range

0.05 to 1 mg/l

1 to 2 mg/l

Number of Pump Strokes

1

1/2

Correction Factor

1

2

Sampling Time

30 seconds per pump stroke

Detecting Limit

0.03 mg/l (n=1)

Colour Change

Yellow        Purple

Reaction Principle

Water vapour is absorbed by reagent to produce alkaline to discolour the indicator to purple.

H2O + Mg(ClO4)2               Mg (ClO4)2 H2O

Coefficient of Variation

10% (for 0.05 to 0.2 mg/l), 5% (for 0.2 to 1 mg/l)

Shelf Life

3 Years

Corrections for temperature & humidity

Unnecessary

Store the tubes at cool and dark place.

 

Possible coexisting substances and their interferences

 

Substance

Concentration

Interference

Change colour by itself

 

Alcohols

-

Unclear demarcation

Purple stain (Whole layer)

 

Aldehydes

-

Unclear demarcation

Purple stain (Whole layer)

 

Ketones

-

Unclear demarcation

Purple stain (Whole layer)

 

Nitriles

-

Unclear demarcation

Purple stain (Whole layer)

 

Hydrocarbons

-

No effect

No discoloration

 

Nitrogen dioxide

-

No effect

No discoloration

 

Sulphur dioxide

100 ppm

Plus error

No discoloration

 

Ammonia

10 ppm

Unclear demarcation

Yellowish green

 

 

Calibration gas generation

Diffusion tube method

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