The First Alert SA340 alarm uses ionization technology only, which means it is better at detecting flaming blazes than slow-smoldering fires. Note: Manufacturers suggest you have both types of smoke alarms in your house -- ionization and photoelectric -- to make sure you're completely covered by being alerted to all types of fires.

There are two types of smoke alarm sensor technology: photoelectric and ionization. Ionization alarms are better at detecting flaming fire conditions, such as paper fires and those fed by flammable fluids. Photoelectric alarms are better at detecting smoldering smoke conditions, such as bedding and upholstery fires that often kill sleepers. A dual sensor alarm is the best choice covering both types of technology. The perfect solution is the First Alert Dual Sensor Remote Control Smoke Alarm SA302 ($40) which uses a 9 volt battery as its power source.

In reviews, experts consistently point to the First Alert SA302CN dual-sensor as the best smoke detector. It runs on a replaceable nine-volt battery and features a combination ionization and photoelectric sensor that is… by far the most accurate and effective detection method available. The First Alert SA302CN smoke alarm has extra features that many detectors do not offer, such as remote-controlled alarm testing and silencing; Intelligent Sensing, which differentiates non-threatening conditions (i.e. kitchen smoke) from real emergencies; and an automatic daily self-check test.

Model Number: SA302CNAUS
* Utilises both Ionisation and Photoelectric Smoke Sensors
* Remote Control Silence/Test-uses most remote controls to quiet unwanted alarms and test alarm functions
* 9-volt Battery
* Single Button Silence/Test
* Intelligent Sensing Technology reduces non-emergency or nuisance alarms
* 10 Year Limited Warranty

First Alert products are available from leading retailers