Lumi-CO® replacement

Battery CO alarm replacement


£50.39 ex VAT

World’s smallest battery-powered carbon monoxide alarm replacement. Replace to monitor your home against the silent killer

Fully fire-rated to keep spaces safe and sound.

Powerful protection in the world’s smallest package.

Battery back-up for peace of mind across your entire home.

It’ll only beep when you need a replacement or if there is an emergency.

Replace the world’s smallest battery-powered carbon monoxide alarm to keep your home safe and sound. Our CO alarms have a minimum 10-year life in normal operating conditions. When the battery is reaching the end of its life, a short beep will sound out every 48 seconds for 30 days. This is your tune to replace your alarm.


Battery type

Non-replaceable CR2 10-year battery

Battery life

Minimum 10-year life in normal operating conditions

Sensor life

10 years after manufacturing date

Operating temperature

+4°C to +38°C (tested 0°C to 55°C)

Operating humidity

Up to 90% RH non-condensing


Audible indicator minimum 85dB @ 3 metres in anechoic successive tones


30/60/90 - Solid Joist 30 - Metal Webbed Joist & I-Joist

Product colour



Cut-out size








Important bits.

Here you can find all the information you need to achieve streamlined results.

Design files.

.RFA, .LDT, and .IES files to help streamline your design.


Every product detail on one useful, downloadable datasheet.

Install sheet.

Download the installation sheet for all our technical know-how.

Test certification.

All our official certifications, ready for you to download.


At Lumi-Plugin® we believe everybody deserves beauty and safety in their home.
We are proud of our almost non-existent failure rate which is why our carbon monoxide alarm comes with a 5-year guarantee.


  • What makes the Lumi-CO® alarm different?

    It’s the world’s smallest carbon monoxide alarm with a 10 year battery, to keep your space bright, beautiful and most importantly- safe.

  • Is the Lumi-CO® alarm as safe as ordinary CO alarms?

    Yes. All our products including our CO alarm are fully accredited and certified by third-party regulators to ensure peace of mind across your entire home. Our CO alarm is more discreet but no less complete, making your space safe and stylish.

  • Is it ok to have CO alarms close to lights?

    Yes. the CO alarm plugin has been tested so the alarms detects and functions with the light fitting in place. If your electrician has any queries please get them to contact us on or +44 (0) 3303 801 329 and we will be happy to answer any questions they may have.

  • If the the Lumi-CO® alarm fails or light fails do I have to replace the whole fixture?

    No. We’ve designed the product so you just replace the part you need. You can replace the CO alarm by adding this product to your basket and the light source here. However, our light has a 5 year use non-stop life cycle or 50,000 hours and our CO alarm has a 10 year life so you don’t need to worry about this for a while.

  • Where would I need a CO alarm in my home?

    Carbon monoxide alarms are designed to protect you from the silent killer, which could come from your boiler or log burner.

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