The TX-6310-01-1 Carbon Monoxide detector has different response levels, depending on how many parts per million (PPM) of carbon monoxide (CO) are detected. The following charts shows different PPM levels:
70 PPM = 60-240 min.
150 PPM = 10-50 min.
400 PPM = 4-15 min.
So if 70 PPM or higher of CO is detected, the alarm will go off within 1-4 hours. If 150 PPM or higher, it will go off within 10 -15 min., and if 400 PPM or greater, it will go off in 4-15 minutes.