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Mains Powered Carbon Monoxide Alarm with Alkaline Back-up Battery - BRK CO850MBXi

Discontinued Product

This product has been discontinued.

Product Overview

The CO850MBXi is a mains powered carbon monoxide (CO) alarm, with a 9V alkaline back-up battery to provide power in the event of mains power failure. This alarm can hardwire interlink with up to 12 compatible carbon monoxide alarms for a simultaneous warning and is supplied with a 5 year warranty as standard. Coloured indicators are used to display power, alarm and faults so any problems can be identified quickly.

  • Mains powered carbon monoxide alarm
  • Alkaline back-up battery (supplied)
  • Hardwire interlink with up to 12 devices
  • 5 year manufacturer's warranty
  • Please note that BRK and First Alert are no longer manufacturing new stock for the European Market and while the products may have a 2018/19 manufacturing date they still provide a full 10 year lifespan and full warranty cover from date of purchase
  • Power, alarm and fault indicators
  • Kitemarked to BS EN 50291-1:2010
  • Loud 85dB warning alarm at 1m
  • Combined test and reset button
  • Dimensions (HxWxD): 134x69x60mm
  • Product warranty and life commences from date of purchase

Please Note: Warranty does NOT include battery

Technical Data
Product Code BKCO850MBXI
Alternative Product Codes CO850MBXI
Brand BRK
Back-Up Battery

9V alkaline

Dimensions (HxWxD)


Sound Output



5 years

Weight 0.23kg
Product Datasheets
FAQs (2)
Q. What are the regulations to testing CO detectors? Do I need to use test gas?

There is no legal or BSI requirement to test the CO detectors with a test gas. A weekly check with the test button is fully sufficient if you choose a quality CO detector. The test gas is offered as a 'belts and braces' option.

Q. Is this CO Detector compliant with all relevant standards to allow me to place it in a tenanted property as I am a landlord?

Yes, this CO alarm has been Kitemarked to EN 50291-1: 2010 and has been awarded a CE mark. It should be installed in line with the manufacturers guidance.

Excellent Warranty

This product is supplied with a 5 year manufacturers warranty as standard

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