Detector Tube Measurement Range 2.5 to 40 Percent Gas Detected Carbon Dioxide For Use With Gastec Pump Color Change Orange to Yellow 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 45 sec (5 to 40 Percent vol) Sampling Volume 50 mL (1/2 Pump Stroke)