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For long-term measurements various direct-reading Dräger-Tubes and systems are available:
Dräger long-term tubes, Dräger diffusion tubes, and Dräger badges. These direct-reading measuring systems can be used to determine average concentrations over periods of several hours. They are typically used during a work shift of up to eight hours. Long-term tubes are used together with the intrinsically safe Polymeter constant flow pump. Organic and inorganic gases and vapours can be recorded in the form of personal or stationary measurements.
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