Dosimeter tubes GASTEC detector tubes - TWA gas measurements

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DOSITUBES

Dosimeter tubes - also called dosi-tubes or passive tubes - are used to measure the average gas exposure value at a work station for a fixed period, usually 8 hours.

Dosimeter Gastec detector tubes constitute simple and economical way to control exposure to harmful gases and vapors in ambient air over a fixed period of time. They are mainly found in warehouses where forklifts travel. Detailed description

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Dosimeter tubes for TWA gas exposure measurements

Dosimeter tubes – also known as dosi-tubes – are designed to monitor total concentrations of a target gas in ambient air during a working day. These Gastec detector tubes measure breathed air during a complete working day (usually 8 hours). This is an easy and cost-effective way to monitor the TWA (time-weighted average) values.

Placed closed to the user’s breathing tracts (shirt or work gear collar for example) with a clip, dosimeter tubes measure the total exposure to a gas during a complete working day. A simple reading at the end of the day on the tube enables users to know the total amount of gas inhaled and if the AOEL (average occupational exposure limit) has been exceeded or not.

Dosi-tubes application examples

GAS

Formula

Application examples

Ammonia

NH3

Some refrigerated warehouses, the food industry, manufacturing of fertilizers, glues and gelatin

Chlorine

Cl2

Swimming pools and some household products

Nitrogen dioxide

NO2

Warehouses with motorized carts (LPG or gas), parking (presence of CO too)

Carbon dioxide

CO2

Mainly indoor pollution (household, office, schools, stores…)

Sulfur dioxide

SO2

Combustion of carbon, petroleum and sulfurated natural gas

Ethanol

CH2O

Distilleries and some agro-food processes, alcoholic beverages or methylated spirits

Formaldehyde

HF

Cosmetics, fungicid, insecticide and disinfecting products, paints, printing inks, glues, waterproofing agents, household products, detergents, wood treatment, insulation in the construction industry…

Carbon monoxide

CO

Wall-mounted boilers, chimneys and any fossil matter combustion system (fuel, gas, coal, wood…)

Hydrogen sulfide

H2S

Wasterwater treatment plants, biogas, wood fermentation, organic matter anaerobic (green waste like algae)

Toluene

C7H8

This pollutant comes from petroleum. It is thus present in solvents, wood stains and glues

Gastec dosimeter tubes assets

  • Easy to use and cost-effective gas detection units
  • Compact, lightweight and non-intrusive
  • Easy instant measures with no specific analysis devices required
  • Wide range of available gases or substances

More Information
ManufacturerGastec
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