Item Description: Gastec Tube 121SL - Benzene in Aromatics LR (1-100 ppm)
Box of 10 tubes contains 5 detector tubes and 5 pretreatment tubes. Tubes connect with a rubber yoke (included) for testing. Box yields 5 tests. Measuring range is 1 to 20 ppm. Range can be extended to 20 to 100 ppm with 1 pump stroke and a correction factor of 5. Box contains complete instructions for use.
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