The main types of smoke alarms in Australia are photoelectric (better suited for smoldering fires) and ionizing (better suited for fast-burning fires), as well as dual-sensor models that combine both technologies. Other categories include interconnected alarms, where all units sound an alarm if one unit is triggered, and hardwired models connected to the mains power supply. Heat alarms and carbon monoxide alarms are separate devices for detecting heat and gas, respectively, and are often used in conjunction with smoke alarms.
Anka Security analyzes the types of smoke alarms for you:
Photoelectric: Uses a beam of light scattered by smoke particles, making it more effective at detecting slow-burning, smoldering fires.
Ionizing: Uses a small radioactive source to ionize the air; smoke particles disrupt the current, triggering the alarm. They can detect fast-burning flames containing tiny particles much faster.
Dual-sensor: Combines photoelectric and ionizing sensors, providing comprehensive protection against both types of fires.
Interconnected: These alarms are connected via wired or wireless means that if one unit detects smoke, all alarms in the system will sound.
Hardwired: These alarms are connected to the mains power supply and usually have a backup battery for power outages. Installation must be performed by a certified electrician.
Other related types of smoke detectors:
Heat alarms: Detect rapid temperature rises or high temperatures, not smoke. They are ideal for places with common smoke, such as kitchens.
Carbon monoxide (CO) alarms: Detect invisible and odorless carbon monoxide gas. They should be used in conjunction with smoke detectors, especially in homes with central heating or gas appliances.
Key considerations for smoke detectors in Australia:
All smoke detectors installed in Australia must comply with Australian Standard AS 3786.
For best protection, install interconnected, photoelectric, or dual-sensor alarms on every floor and in every bedroom of your home.
Many states require hardwired alarms for homes built or renovated after a certain date.
