Detector Tube Measurement Range 0.5 to 125 ppm Gas Detected Nitrogen Dioxide For Use With Gastec Pump Color Change White to Yellowish Orange Operating Pressure 912 to 1 114 hPa Operating Temperature - Minimum 32 Degrees F Tube Material Glass Break-Off Tip Yes Calibrated Yes Product Type Gas Detection Tube Sampling Method With Pump Shelf Life 3 yr Application Industrial Safety and Health Sampling Time 1 min (0.5 to 30 ppm) Sampling Volume 200 mL (2 Pump Stroke)