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LED Carbon Monoxide Alarm - First Alert CO-FA-9B

Discontinued Product

This product has been discontinued.

Product Overview

The First Alert CO-FA-9B is a great value carbon monoxide (CO) alarm, powered by 2 x AA batteries, that can be wall mounted or left free standing for easy installation. The test button allows you to manually test the CO alarm but also features an automatic self-check facility, testing the functionality of its own battery and sensor.

  • Battery powered CO alarm - AA alkaline batteries included
  • CE marked and Kitemarked to BS EN 50291-1:2010+A1:2012 (domestic use) & BS EN 50291-2:2010 (camping/caravans/motor homes)
  • Features a test and reset button
  • CO sensitivity level: 50ppm
  • LED status indicators to show standard power or alarm mode
  • Sounds an 85dB audible warning upon activation
  • 7 year lifespan and manufacturer's warranty
  • Auto self check facility - tests its own sensor and battery
  • Suitable for wall mounting or free standing
  • Certified for home, camping, caravan and motor home use
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
Technical Data
Product Code 1ACOFA9B
Alternative Product Codes CO-FA-9B, COFA9B
Brand First Alert
Battery Type

2 x AA batteries

Dimensions (HxWxD)



LED indicators

Operating Temperature

-10°C to +40°C

Relative Humidity

30% to 90%


50ppm (parts per million)

Sound Output



7 year warranty

Weight 0.17kg
Product Datasheets
FAQs (3)
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.

Q. Where should I install carbon monoxide detectors?

CO detectors should be installed near boilers and other potential sources of carbon monoxide. Keep a 1 to 3 meter distance to the boiler etc to avoid small start-up CO discharges to cause false alarms.
As you are likely to be most affected by CO in areas of your home that you spend the most time in it is advisable to install detectors in those areas as well, such as the living room and bedrooms.
It is also worth noting that while one detector is better than no detectors at all, larger homes may require several detectors to cover the property fully.

Which areas to avoid?

Do not install CO alarms above or below windows.

Although most kitchens contain fuel burning appliances it is not recommended to install your detector there. Kitchens can be quite steamy while you are cooking and this may affect the sensor in the CO detector. Similarly it is not recommended to install detectors in dusty areas such as workshops or garages.

For more information please watch our video guide

Customer Reviews

154 customers have given this product an overall rating of 4.7 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by:

The first alarm I've had for monoxide, seem to be fine

Published on: 25th October 2018

Rating: 5 / 5 Stars

Reviewed by:

Very pleased with product

Published on: 16th September 2018

Rating: 5 / 5 Stars

Reviewed by:

Excellent quality and price Fast delivery

Published on: 28th July 2018

Rating: 4 / 5 Stars

Reviewed by:

life saver, what else is there left to say.

Published on: 6th July 2018

Rating: 5 / 5 Stars

Reviewed by:

does exactly as stated

Published on: 6th July 2018

Rating: 5 / 5 Stars

Reviewed by:


Published on: 1st July 2018

Rating: 5 / 5 Stars

Reviewed by:

Does the job. Smart, functional.

Published on: 29th June 2018

Rating: 5 / 5 Stars

Reviewed by:

Very satisfied and a good price.

Published on: 28th June 2018

Rating: 5 / 5 Stars

Reviewed by:

A very effective preduction.

Published on: 29th May 2018

Rating: 5 / 5 Stars

Reviewed by:


Published on: 25th May 2018

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