Detector Tube, Measurement Range 0.5 to 5 ppm, Gas Detected Mercaptans, For Use With Mfr. No. 6400000, Color Change White to Yellow, Operating Pressure 1,013 hPa, Operating Temperature – Minimum 50 Degrees F, Tube Material Glass, Break-Off Tip Yes, Calibrated Yes, Product Type Gas Detection Tube, Shelf Life 2 yr, Application Civil Defense, Fire Brigades, Industrial Applications, Military, Includes Instructions, Sampling Time 5 min (0.5 to 5 ppm), Chemical Formula RSH