Gastec Dosi Tubes
The passive Gastec Dosi-tube shows a colour stain to determine how much hazardous gas a worker has been in contact with over the Time Weighted Average (TWA). Dosi-tubes are clipped into a dosi-tube holder (bought separately) which attaches to an item of clothing and worn over a working day or shift.
Our Gastec Dosi-Tube Collection
Simple to Read
No chart or lab analysis required.
Next Day Delivery
Order before 2pm for next day delivery*.
Low upfront cost, no calibration, and no lab testing cost.
What is a Dosi-Tube?
The Gastec Dosi-Tube is a direct read tube which shows a colour stain to determine how much hazardous gas a worker has been in contact with over the given period.
A Gastec Dosi-Tube is a glass tube of a specific inner diametre that is filled with a diffuser and chemical reagent in parallel that enable gas to disperse at a constant rate resulting in a longer discolouration and better demarcation.
The passive Dosi-Tube can then be positioned in the worker’s breathing zone where it can be attached with a holder and collar clip (separately available: Art.No.710) and the amount of individual exposure can be measured. Stationary use is also possible for time weighted average (TWA) measurements of concentration distribution or change within a fixed environment over longer periods, such as the course of a whole day.
Compact, lightweight, and versatile (can be used anywhere)
Easy direct measuring and reading
No sampling pump necessary
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