ST-750

Multi-Sensor Smoke Alarm, 10 Year Life-Time Battery

Thermoptek 10 Year Warranty Kitemark Sealed battery Battery Silence

Product description

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.

FireAngel are committed to developing technologies which provide the highest levels of fire detection in your home. 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.

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.

Testing your smoke alarms no longer requires a step ladder. FireAngel have you covered with a large central push button. 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.

MoreLess

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.

FireAngel are committed to developing technologies which provide the highest levels of fire detection in your home. 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.

Key Benefits and Features

Where to install your CO alarm

Product manual

Product manual

Click the icon to download the product manual

Datasheet

Datasheet

Click the icon to download the product datasheet

Compliant and Certified For Safety

What's in the box?

Reviews from our customers

Related FAQs

Ensure alarms are installed in appropriate locations. Smoke alarms should be kept away from kitchens and bathrooms where cooking fumes and steam can trigger false alarms.
Clean alarms regularly to remove dust or debris that could cause false alarms.
Consider installing heat alarms in areas prone to false alarms, such as kitchens and garages.

Smoke alarms do not detect carbon monoxide (CO), for this additional detection you need to also install a CO alarm or a combination smoke and CO alarm, such as the FireAngel SCB10.

According to latest BS 5839‑6 standards, for maximum LD1 protection you should fit a smoke alarm in the following rooms: Hallway, Landing, Living Room, Bedroom, Airing / Meter Cupboards, Loft, Garage. A smoke alarm is not recommended for installation in a kitchen, you should install a heat alarm in kitchens.
For further guidance on BS 5836‑6, please visit our Standards and Regulations Section.

No, FireAngel Multi-Sensor alarms are not recommended for kitchens due to the likelihood of nuisance alarms from cooking fumes. FireAngel heat alarms should be installed in kitchens instead.

T

See all faqs

Extend your protection

Protecting your home and loved ones is easier than ever with our range of smoke, heat, and carbon monoxide alarms. To ensure complete coverage, it’s essential to place the right alarm in the right location. Check out what alarms are right for you on our help to buy quiz.

For even greater peace of mind, consider upgrading to our Pro Connected Range. These smart alarms offer wireless interlinking, meaning if one alarm is triggered, all alarms in your home will sound. Plus, they can be monitored through our FireAngel Connected smartphone app, whether you’re at home or away.

extend your protection
Optical Smoke Alarm, 10 Year Life-Time Battery image

FA6620-R

Optical Smoke Alarm, 10 Year Life-Time Battery

The FireAngel FA6620 Smoke Alarm has been designed to make protecting your home simple, with easy...

Smoke Alarm with Escape Light image

FA6611-R

Smoke Alarm with Escape Light

Looking for a FireAngel ST-623E smoke alarm replacement? Replace your end of life alarm with the...

Kitchen Heat Alarm, 10 Year Life-Time Battery image

FA6720-R

Kitchen Heat Alarm, 10 Year Life-Time Battery

Fit in your kitchen or replace your end of life FireAngel HT-630 heat alarm to be alerted to fires...

Carbon Monoxide Alarm, 10 Year Life-Time Battery image

FA3820X4

Carbon Monoxide Alarm, 10 Year Life-Time Battery

Looking for a CO-9X alarm replacement? With the latest sensing technology, a clear loud alarm and...

Pro Connected Smart Smoke Alarm, Battery Powered image

FP2620W2-R

Pro Connected Smart Smoke Alarm, Battery Powered

With enhanced sensing, multiple installation styles and the option to enable alerts and test via...

Pro Connected Smart Gateway image

FP1000W2-R

Pro Connected Smart Gateway

With enhanced sensing, multiple installation styles & the option to enable alerts & test...

Pro Connected Kitchen Heat Alarm, Battery Powered image

FP1720W2-R

Pro Connected Kitchen Heat Alarm, Battery Powered

With enhanced sensing, multiple installation styles and the option to enable alerts and test via...

Pro Connected Kitchen Heat Alarm, Mains Powered image

FP1740W2-R

Pro Connected Kitchen Heat Alarm, Mains Powered

With enhanced sensing, multiple installation styles and the option to enable alerts and test via...

Got a burning question? Get in touch

If you can't find what your looking for on our blogs and looking for further guidance and advice, our UK-based Customer Support team are on hand all week from 8:30am until 5:30pm, they can answer any further queries you may have on our products, solutions or services.

Related support posts

Introducing our Ultra Slim Smoke and Carbon... image

CO Safety

Introducing our Ultra Slim Smoke and Carbon...

Sleek. Smart. Subtle. Safety has never looked this good with our latest Ultra Slim products.

Top 10 electrical fire safety tips every UK... image

Fire Safety

Top 10 electrical fire safety tips every UK...

November is NFCC Electrical Fire Safety Month: a timely prompt for every UK household to revisit...

How to stay safe on Bonfire Night image

Community

How to stay safe on Bonfire Night

From safe firework handling to year-round home protection, we share trusted Bonfire Night safety...

Can a carbon monoxide detector detect gas? image

CO Safety

Can a carbon monoxide detector detect gas?

Understanding the difference between carbon monoxide and natural gas is essential for home safety...

Candle Fire Safety Week 2025: Keeping you... image

Fire Safety

Candle Fire Safety Week 2025: Keeping you...

For Candle Fire Safety Week 2025, discover essential tips to enjoy candles safely, protect your...

Staying warm in Autumn without the risk of... image

CO Safety

Staying warm in Autumn without the risk of...

Stay warm this autumn safely. Expert tips on using heaters, fires and vents from FireAngel UK.