This tube is designed primarily for the following gas and range. Some tubes may be used for additional gases. Please reference the specification sheet for complete details of all compatible gases for this tube.#121SL Benzene 1-100ppm(Twin Tube = 5 tests per box)
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Gastec detector tubes are thin glass tubes with calibration scales printed on them which allows you to directly read concentrations of the substances (gases and vapors) to be measured. Each tube is hermetically sealed and contains detecting reagents that are especially sensitive to the target substance and quickly produces a distinct layer color change. To assure high precision indication, Gastec detector tube's inner diameters are tightly controlled and detecting reagents with long term stability (many have 3 year shelf life) are strictly selected. Tubes meet the following regulatory standards: JIS - Japanese Industrial Standard; BS 5354 (UK); DIN 33882 (Germany).
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