Detector Tube Measurement Range 10 to 1 500 ppm Gas Detected Styrene For Use With Gastec Pump Color Change White 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 30 sec (20 to 500 ppm) Sampling Volume 100 mL (1 Pump Stroke) Chemical Formula C8H8