Detector Tube, Measurement Range 5 to 140 ppm, Gas Detected Methyl Mercaptan, For Use With Mfr. No. NX-1000-100, Mfr. No. NX-1000-130, Mfr. No. NX-1000-150, Mfr. No. NX-1000-200, Mfr. No. NX-1000-230, Mfr. No. NX-1000-250, Tube Material Glass, Break-Off Tip Yes, Calibrated Yes, Product Type Gas Detection Tube, Sampling Method With Pump, Shelf Life 2 yr, Application Atmospheric Pollution Survey, Concentration Control of Odorant, Fungicide, Pesticides, Plastics, Chemical Formula CH4S