10 Year Multi-Sensor Smoke Alarm

10 Year Sealed Lithium Battery

If you're looking for a replacement alarm previously fitted by Fire & Rescue Services, the ST-750 is ideal and in most instances will not require changing the baseplate.


Multi‑sensor, optimised fire detection

10 Year Warranty

For peace of mind




Our datasheet and manual contain guidance on the product and the latest standards - if you have any additional questions, our team of experts can offer all the support you need, so get in touch!


Installation Support and Guidance


Specification Detail and Standards.




This alarm cannot be interlinked to other alarms in your home, but still offers a high protection against fire. Follow the installation guides to ensure your alarm is installed correctly and test weekly.


Testing and maintenance support.

Enhanced technology Thermoptek

Thermoptek technology combines the very latest in optical sensing with thermal enhancement for a rapid response to fire, providing vital time for you and your family to react.

Battery Powered Quick and Easy Installation

The alarm comes with a sealed, tamper proof battery that will last the lifetime of the alarm. The sensor life is 10 years, so to ensure your home remains protected we recommend you replace the alarm after 10 years.

Quick and Easy Installation
Designed For You Testing Made Simple

As well as allowing easy testing, this large button also activates our Sleep Easy function which silences low battery chirps for 8 hours - giving you a peaceful night's sleep.

Testing Made Simple

Did you know?

Enjoy a peaceful night's sleep and still be protected Find out more

With our sleep easy function, you can silence low battery chirps for 8 hours by pressing the large self-test button. This alarm will help you have a peaceful night's sleep and still protect you.

Find out more
Complete the range…


Guidance for where to install your smoke, heat and CO alarms can be found below:

Why is my FireAngel smoke alarm beeping?

Where your alarm is installed can trigger nuisance alarms if not correctly placed, for example too close to doors or windows.

Why is my FireAngel smoke alarm beeping?

For more guidance as to where to install your smoke, heat or CO alarm please refer to your alarm’s manual or contact our friendly Customer Support team.