Item Description: Gastec Tube 181 - Aniline (1.25-60 ppm)
Measuring range is 2.5 to 30 ppm. Range can be extended to 1.25 to 2.5 ppm with 5 pump strokes and a correction factor of 1/2, and to 30 to 60 ppm with 2 pump strokes and a correction factor of 2. Box contains complete instructions.
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