Detector Tube Measurement Range 0.5 to 150 ppm Gas Detected Hydrogen Cyanide For Use With Gastec Pump Color Change Yellow to Pink 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 2 yr Application Industrial Safety and Health Sampling Time 45 min (2.5 to 60 ppm) Sampling Volume 100 mL (1 Pump Stroke) Chemical Formula HCN