Abus COWM300 User Manual page 14

Functional principle and features
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The battery-operated ABUS CO alarm (COWM300) detects carbon
monoxide (CO) in even low concentrations, then gives off an acoustic as
well as optical signal.
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The purpose of the CO alarm is to protect persons against the acute
effects of carbon monoxide. However, it cannot prevent the chronic affects
of carbon monoxide exposure or offer persons with special risks complete
safety.
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The CO alarm is not a substitute for smoke, fire or other
alarms.
It does not detect smoke, heat or other gases.
In addition, the electrochemical sensor can only detect CO on
time in a limited area (max. 60 m², depending on the
environmental conditions).