Detector Tube, Measurement Range 0.1 to 65 ppm, Gas Detected Benzene, For Use With Gastec Pump, Color Change White to Dark Green, 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 10 min (0.1 to 10 ppm), Sampling Volume 500 mL (5 Pump Stroke), Chemical Formula C6H6