A smoke detector is a device that detects smoke, typically as an indicator of fire. Household smoke alarms issue a local audible alarm from the detector itself. According to the New Zealand Fire Service, last year they attended 3,700 house fires. In over 80% of those fires, smoke alarms were either not installed or not working. The New Zealand Fire service recommend the installation of long-life photoelectric type smoke alarms. For more information visit New Zealand Fire Service website.