The First Alert OneLink SCO501CN is part of the Smoke & Carbon Monoxide Detectors
test program at Consumer Reports. In our lab tests, Smoke & Carbon Monoxide Detectors
models like the OneLink SCO501CN are rated on multiple criteria, such as those listed below.
High CO levels: High CO levels rates a model's response to CO of 300 parts per million.
Low CO levels: Low CO levels rates a model's response to CO of 150 ppm.
Display/voice: Display/voice rates the accuracy of the CO level either displayed digitally or conveyed by voice message.