Detector Tube Measurement Range 0.05 to 9.8 ppm Gas Detected Phosphine For Use With Gastec Pump Color Change Yellow to Red 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 7.5 min (0.1 to 1.5 ppm) Sampling Volume 500 mL (5 Pump Stroke) Chemical Formula PH3