Battery-powered smoke detectors are stand-alone units. But if you have AC-powered smoke detectors in your home and your home has been built in the last 10 years in the U.S., chances are they are wired together to intercommunicate. This sort of wiring guarantees that if one alarm in the house goes off, they all go off.
This detector can tell you the highest level of CO concentration in your home in addition to alarming. Replace your CO detector every five years. Have your heating system, water heater, and any other gas, oil, or coal burning appliances serviced by a qualified technician every year. Do not use portable flameless chemical heaters indoors.
Photo: How an electronic, colorimetric carbon monoxide detector works. An LED shines through a colored chemical detector onto a photocell. When carbon monoxide is present, the detector changes color, the beam is interrupted, and the photocell no longer picks up light. This triggers the circuit, which sounds the alarm.
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how do co2 detectors work
