Detector Tube Measurement Range 5 to 50 ppm Gas Detected Carbon Monoxide For Use With Mfr No GV-100-SOHA-TR Mfr No GV-110-S-TR Mfr No GV-110-SOHA-TR Color Change Yellow to Blackish Brown Operating Pressure Ambient Operating Temperature - Minimum 32 Degrees F Tube Material Glass Break-Off Tip Yes Calibrated Yes Product Type Gas Detection Tube Shelf Life 3 yr Application Industrial Safety and Health Sampling Time 3 min (5 to 50 ppm) Sampling Volume 300 mL Chemical Formula CO