The 770 is a state-of-the-art carbon monoxide instrument designed to measure CO in ambient air. This palm-sized unit displays readings in 1 ppm increments.
* Measure CO from 0 to 999 ppm * Displays the max. CO reading in ppm since power on * Displays, in hours and minutes, time elapsed since power on * Displays user set value of audible and visual alarm * Audible alarm can be switched on or off by pressing SEL button