Detector Tube, Measurement Range 0.1 to 18 ppm, Gas Detected Acrylonitrile, 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 3 yr, Application Industrial Safety and Health, Sampling Time 4 min (0.2 to 6 ppm), Sampling Volume 200 mL (2 Pump Stroke), Chemical Formula C3H3N