Mains powered with a lifetime back-up battery, the FireAngel Pro series of alarms are available in two versions: with optical smoke or heat sensor. Up to 30 FireAngel Pro alarms can be hard wire interlinked within a single system, enabling all alarms to sound if any one of them detects a fire. The sealed lithium back-up battery is designed to last the full 10 year life of the alarm and continues to provide power in the event of a mains failure.
- 230V mains powered with sealed lifetime lithium battery – never needs replacing!
- Frustration-free! No need to replace the back-up battery for the life of the alarms
- Kitemarked to and
- Suitable for installations complying to Grade D1
- Available in two versions:
- Optical smoke alarm (ST-230) responds quickly to smouldering fires - used in bedrooms, living rooms and hallways
- Heat alarm (HT-230) responds to rate of increase in temperature - used in kitchens and garages
- Test, hush and
- Locate function: allows you to find the alarm that activated the system
- Up to 30 alarms can be hard-wire interlinked within a single system
- Tamper-proof mounting plate locks the alarm head in place
- Please note: Alarms sold separately
- This alarm is also suitable for the updated 2022 Scottish legislation for fire alarms in homes
In a wireless-only system the maximum number of compatible units that can interlink is 50, while a hard-wired-only system is limited to 30 units. In a mixed hard-wired and wireless alarm system these maximum quantities can be exceeded.
For each "group" of hard-wired alarms in a system, only one should be a wireless model. For example, in a 3 storey house you could hard-wire 2x ST-230 and 1x WST-230 alarms together on each floor with all of the WST-230 models wirelessly interlinked to each other. This can technically be done to a maximum of 50 groups of 30 alarms, though FireAngel has not designed, optimised, or tested these alarms for such a large system. Having so many alarms interlinked would create large communication delays between the alarms, potentially resulting in occupants not being given adequate warning of a fire. It is heavily recommended that customers desiring a large amount of alarms for a single property instead look into full Fire Alarm Systems which are designed for larger premises.
The table below shows all the units that can interlink with the FireAngel Pro alarms.
Alarms from the Same Series
Model Number |
Type of unit |
Type of interlink |
WST-230 |
Mains Powered Optical Smoke Alarm |
Hard-wire interlink |
WHT-230 |
Mains Powered Heat Alarm |
Hard-wire interlink |
ST-230 |
Mains Powered Optical Smoke Alarm |
Hard-wire interlink |
HT-230 |
Mains Powered Heat Alarm |
Hard-wire interlink |