More than 3,000 people die in fires across the country each year. In Massachusetts, the number of deaths compared to last year is already on the rise.

St. Tammany Fire District #1 Chief, Chris Kaufmann, explained there's two types, ionization and photoelectric. Photoelectric smoke detectors use LED light.

There are three available types of household smoke detectors — ionization, optical (photoelectric), and combined. They are very cheap and are available everywhere. The combined detectors are effective ...

What to know before you buy a smoke detector Sensor type. Smoke detectors are designed to alert for even the slightest trace of smoke. They do this with one of three types of sensors.