Detector Tube, Measurement Range 0.5 to 10 ppm, Gas Detected Sulfide Ion, For Use With Mfr. No. 90005, Tube Material Glass, Break-Off Tip Yes, Calibrated Yes, Product Type Gas Detection Tube, Shelf Life 2 yr, Application Fast and Economical On-The-Spot Detection of Trace Chemicals in Liquids. Several Applications, Including Chromium (VI) Ion, Mercury, Sulfide Ion, Chemical Formula S2, Package Quantity 10