Detector Tube, Measurement Range 5 to 50 ppm/1 to 15 ppm, Gas Detected Nitric Acid, For Use With Mfr. No. 6400000, Color Change Blue to Yellow, Operating Pressure 1,013 hPa, Operating Temperature – Minimum 41 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 2/4 min (5 to 50 ppm/1 to 15 ppm), Chemical Formula HNO3