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Smoke Alarms

Safeguarding your home and family could not be more convenient thanks to OnBuy's brilliant range of smoke alarms and heat detectors. Packed with options for every room of the house (not to mention, every type of flame), we have have fire protection all ticked off. Read more about Smoke Alarms >

Showing 1-60 of 107 results

SDC1 Dust Cover For Smoke & Heat Detectors | Fire Alarm Cover £1.37 Save 17% £1.14 Popular+£2.90 Delivery

Carbon Monoxide (CO) Detector Alarm - Battery Operated Carbon Combination UK

(2) £15.90 Save 50% £7.95 Free Delivery

2x Fire Alarm Extended Battery Life Smoke Detector Sensor by Cri

(13) £8.10 Free Delivery

2x Fire Alarm Extended Battery Life Smoke Detector Sensor by Cri

(6) £13.59 Save 28% £9.78 Free Delivery

Kidde 10SCO Combination Smoke and Carbon Monoxide Alarm with Voice Notification £34.50 Fast & Free Delivery

Aico EI140 Series, Mains 240volt, With Alkaline Battery Backup £35.30 Fast & Free Delivery

Pifco British Standard Optical Smoke Detectors Fire Alarm Ionisation EN14604

(1) £6.99 Fast & Free Delivery

Fike Twinflex Pro2 Fire Alarm Kit - 4 Zone Kit With Batteries £399.99 +£6.50 Delivery

X-Sense 10-Year Battery Combination Smoke & Carbon Monoxide Alarm Detector with LCD Display, SC07 £76.99 Save 23% £58.99 +£6.99 Delivery

First Alert SCO5 Combination Optical Smoke Alarm & Carbon Monoxide Detector, AA Battery Powered £53.99 Save 46% £28.90 Fast & Free Delivery

Kidde KF10 Ionisation Smoke Alarm

(1) £17.99 Fast & Free Delivery

Aico Ionisation Smoke Alarm - Battery Operated

(13) £7.99 Fast & Free Delivery

Multiple Options Available Double Function Alarm Temperature and Smoke From £17.53 Free Delivery

Multiple Options Available Smoke Detector Fire Alarm, Independent Sensor For Home, Security Photoelectric From £19.31 Free Delivery

Saxophone Tobacco Herb Smoking Pipes Water Pipes With Mesh Cigarette £8.80 Save 50% £4.40 Free Delivery

Fireangel ST-622Q 10 Year Thermally Enhanced Optical Smoke Alarm £10.99 Free Delivery

X-Sense 10-Year Life Carbon Monoxide Alarm Detector £25.99 Free Delivery

Fireangel CO-9D Digital Sealed for Life Carbon Monoxide Alarm £18.99 Free Delivery

Multiple Options Available Kidde Carbon Monoxide Alarm From £14.99 Free Delivery

Multiple Options Available Car Smoke Leak Detector/Automotive EVAP & Gas Leakage Locator and Oil Pipe Generator Diagnostic Tool £210.78 Save 7% From £195.25 Free Delivery

Kidde Continuous Monitoring Carbon Monoxide Alarm £14.42 +£2.99 Delivery

Multiple Options Available Lowest Price Gas Heating Boiler/water Heater Spare Parts Temperature Sensor £13.15 Save 8% From £12.10 Free Delivery

Multiple Options Available Smoke Detector Sensitive, Fire Sensor/Wireless Security Home Alarm System From £25.09 Free Delivery

Thermally Enhanced Sensing Optical Smoke Alarm Detector Fire Safety £15.44 Fast & Free Delivery

CO Carbon Monoxide LCD Detector Poisoning Gas Alarm Warning Sensor Home Factory £50.00 Save 58% £21.05 Free Delivery

Home Smoke Fire Alarm Twin Pack SB1-TP-R Gas Sensor Batteries £21.99 Save 40% £13.19 Free Priority Delivery

Fireangel Home Smoke Fire Alarm Twin Pack Gas Sensor Batteries £21.99 Save 41% £13.05 Free Delivery

Grundig Smoke Detector Inc Battery £17.99 Save 50% £8.99 +£6.49 Delivery

GENUINE FIREANGEL OPTICAL FIRE ALARM SMOKE DETECTOR WITH HUSH ZINC BATTERY SB1-T £12.99 Fast & Free Delivery

Kidde 7COC Carbon Monoxide Alarm £19.51 Fast & Free Delivery

FireAngel TCO-9BQ Carbon Monoxide 7 Year Life LED display CO-9B CO Alarm pack 2 £69.99 Save 26% £51.99 +£6.99 Delivery

Fireangel CO-9D Digital Sealed for Life Carbon Monoxide Alarm, White £57.99 Save 49% £29.64 Free Delivery

Ei Electronics Smoke Alarm and Test Button with Batteries - Twin Pack £55.99 Save 30% £38.99 +£6.99 Delivery

BRK 770MBX Ionisation Smoke Alarm, Mains Powered with 9V Battery Backup, Push Fit Base £61.99 Save 24% £46.99 +£6.99 Delivery

Kidde 10LLDCO Ten Year Life Carbon Monoxide Alarm Digital Display with Sealed Longlife Battery £59.99 Save 51% £29.42 +£6.50 Delivery

HONEYWELL XC70 Carbon Monoxide Alarm Detector Latest X-series 7 Yr £72.99 Save 34% £47.99 +£6.99 Delivery

Kidde Firex KF20 Optical Smoke Alarm - Mains Operated with Battery Back Up £64.99 Save 26% £47.99 +£6.99 Delivery

FireAngel TCO-9XQ Carbon Monoxide Alarm (Sealed for Life Battery) £69.99 Save 23% £53.99 +£6.99 Delivery

Fire Safety Supplier KAC Call Point Cover £30.99 Save 19% £24.99 +£6.99 Delivery

BRK 670MBX Ionisation Smoke Alarm, Mains Powered with 9 V Battery Backup £61.99 Save 27% £44.99 +£6.99 Delivery

Honeywell XC100D Carbon Monoxide Alarm £90.99 +£6.99 Delivery

2 x Kidde 5DCO Battery Operated Carbon Monoxide Alarm with Digital Display £76.99 Save 23% £58.99 +£6.99 Delivery

Kidde Lifesaver Carbon Monoxide Alarm 5CO Twin Pack £66.99 Save 61% £25.99 Fast & Free Delivery

Honeywell 1901504901 Battery Operated Carbon Monoxide Detector, White £59.99 Save 23% £45.99 +£6.99 Delivery

FireAngel CO-9X-10T-FF Carbon Monoxide Alarm, Multi £68.99 Save 23% £52.99 +£6.99 Delivery

Battery Operated Smoke Alarm £46.99 Save 23% £35.99 +£6.99 Delivery

Kidde KID9040TLSB Twin Pack of Smoke Alarms £42.99 Save 21% £33.99 +£6.99 Delivery

Thermoptek Toast Proof Smoke Alarm - FireAngel ST-625 £42.99 Save 26% £31.99 +£6.99 Delivery

KAC Call Point Test Key x5 by Midland Fire On-Line £29.99 Save 83% £4.99 Fast & Free Delivery

2 x Kidde Firex KF10 (4870) Mains Smoke Alarm Ionisation Sensor with 9V Built in Battery Back Up/Test and Hush Button £71.99 Save 25% £53.99 +£6.99 Delivery

FireAngel ST-750T Thermoptek Smoke Alarm £49.99 Save 28% £35.80 Free Delivery

Optical smoke detector with 10 year lifetime and 1 year battery RM250 10.044.62, White, 1 Pack £36.99 Save 24% £27.99 +£6.99 Delivery

X-Sense Smoke Alarm Detector, 10-Year Battery Fire Alarm Smoke Detector with LED Indicator & Silence Button, Conforms to EN14604 Standard, SD11 £49.99 Save 20% £39.99 +£6.99 Delivery

X-Sense Smoke Alarm, 10-Year Battery Fire Alarm Smoke Detector with LED Indicator & Silence Button, Conforms to EN14604 Standard, SD13 £49.99 Save 18% £40.99 +£6.99 Delivery

Kidde 10Y29 RB Ten Year Life Sealed Battery Smoke Alarm £46.99 Save 23% £35.99 +£6.99 Delivery

Kidde 29HDRB Smoke Alarm £43.99 Save 58% £18.39 +£6.50 Delivery

FireAngel SCB10-R Smoke and CO Alarm £54.14 Fast & Free Delivery

PICTEK Smoke Alarm, Smoke Detector Battery Operated with 10 years Life Time Photoelectric Fire Alarm with Light/Loud Alarm, Low Battery Reminder, Te £46.99 Save 17% £38.99 +£6.99 Delivery

FireAngel ST622 Thermoptek Smoke Alarm - 10 Year Life £50.99 Save 27% £36.99 +£6.99 Delivery

X-Sense 10 Year Battery Smoke and Carbon Monoxide Alarm with Display, Dual Sensor Smoke CO Detector Complies with EN 14604 and EN 50291 Standards, A £69.99 Save 16% £58.99 +£6.99 Delivery

Most loved smoke alarms

2x Fire Alarm Extended Battery Life Smoke Detector Sensor by Cri

Very good product arrived weeks earlier than expected. Comes in a handy pack of two after all We all need more than one. Excellent price and easy to operate. Better to be safe than sorry Remember insu...

2x Fire Alarm Extended Battery Life Smoke Detector Sensor by Cri

yes all ok,a bit slow on the delivery side but good price for 2. will fit them today and all seems easy as instructions are in Chinese its a good job I`ve fitted others before and know the score

Aico Ionisation Smoke Alarm - Battery Operated

Aico Ionisation Smoke Alarm - Battery Operated. - Excellent item and good value together with free fast delivery. Cannot fault. Thank you.

Pifco British Standard Optical Smoke Detectors Fire Alarm Ionisation EN14604

Happy with the product, exactly how it appears on the website, prompt delivery and good packaging also. Would buy again if/when required.

Kidde KF10 Ionisation Smoke Alarm

I am very happy with this item, it was to replace an old smoke alarm and it fitted nicely into the existing space.

Fike Twinflex Pro2 Fire Alarm Kit - 2 Zone Kit With Batteries

Price was better than buying direct from SD Alarms....

About Smoke Alarms

Fire safety should always be a top priority in your home - and luckily, here at OnBuy, we take it very seriously. With an extensive selection to suit every household need, discover battery-powered smoke alarms and mains-powered smoke alarms on offer to keep you and your family safe.

In our range of smoke alarms for sale, you'll find optical smoke alarms for areas where you might experience false activation (they make brilliant smoke alarms for kitchens), ultra-sensitive ionisation smoke alarms (best placed away from cooking fumes!) and clever multi-sensor smoke alarms.

In addition to smoke detectors, our virtual shelves are also stocked with heat alarms and carbon monoxide detectors for full home protection - just don't forget to stock up with a fire blanket and extinguisher for additional safety measures that work hand in hand to help protect your abode!