Detector Tube Measurement Range 2 to 62 ppm Gas Detected Methanol For Use With Mfr No 71640 Mfr No GV-100-SOHA-TR Mfr No GV-110-S-TR Mfr No GV-110-SOHA-TR Color Change Pale Yellow to Pale Bluish Green Operating Pressure Ambient 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 8 min (2 to 20 ppm)