Assertion: co detector | /r/CapableOf | sound alarm
Facets:
Source sentences:
text: CO detectors are designed to measure CO levels over time and sound an alarm before dangerous levels of CO accumulate in an environment, giving people adequate warning to safely ventilate the area or evacuate.
text: A CO detector approved by UL, the Underwriters Laboratory, will sound an alarm when concentrations of CO reach 70 ppm and remain steady for one to four hours.