Description 0 Reviews Gastec Mercaptans Gas Detector Tubes. Options: Mercaptans Gas Detector TubesMeasuring Range: 0.1-8 ppm 10 tubes, 10 tests per box P/N 70L Mercaptans Gas Detector TubesMeasuring Range: 0.5-120 ppm10 tubes, 10 tests per box P/N 70 Write a Review 0 Reviews Hide Reviews Show Reviews