GAS8D Chlorine Passive Dosi-Tube 0.08 - 100ppm


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Next Working Day Delivery - When Ordering Gastec Detector 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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Shelf Life - a1-cbiss will never dispatch detector tubes with less than 3 months remaining before expiry. a1-cbiss employ a stock rotation policy of first in, first out. Specific shelf life requirements must be identified at the point of order placement (use the comment box in the checkout process). The expiry date is printed clearly on the front of the detector tube packet.

Excl. VAT: £36.75 Incl. VAT: £44.10
Excl. VAT: £36.75 Incl. VAT: £44.10

Product Description


GAS8D Chlorine (Cl2) Gastec Passive Sampling Dosi Tubes (Time Weighted Average Detector Tubes)

The Dosi-Tube System allows an operator to evaluate the level of gas a worker is exposed to over a time period such as a working shift.

The Dosi-Tube is easily clipped into the Dosi-tube holder (GAS710) which is worn on a garment of clothing.


Measuring Range

0.08 to 100 ppm

Sampling Hours

0.5 to 24 hours

Detecting Limit

0.1 ppm (10 hours)

Colour Change

White       Yellow

Reaction Principle

Chlorine oxidizes o-toludine for form yellow colour stain.

Coefficient of Variation

10% (for 2 to 50 ppm-hr)

Shelf Life

Up to 2 years from point of manufacture

Corrections for
temperature & humidity


Store the tubes at cool and dark place.


Possible coexisting substances and their interferences





Change colour by itself

Nitrogen dioxide, Halogens


Plus error

Discolour yellow stain

Calibration gas generation

Permeation tube method


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Product Downloads

View FileGAS8D Chlorine Datasheet
View FileGastec Detector Tube List 25th Edition & Manual
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