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First Alert SA300UK Ionisation Smoke Alarm & CO-FA-9B Carbon Monoxide Alarm

Discontinued Product

This product has been discontinued and is no longer available to buy.

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Product Overview

Our First Alert smoke alarm and carbon monoxide (CO) alarm special offer provides detection against both dangers at a great discounted price. The SA300UK is an ionisation smoke alarm with test button facility and a 5 year manufacturer's warranty, whilst the CO-FA-9B carbon monoxide alarm can be wall mounted or left free standing, and has a 7 year warranty.

Ionisation smoke alarm:

  • Battery powered (9v alkaline battery included)
  • Test and hush button
  • Suitable for installations complying to BS 5839-6: 2019 Grade F2
  • 5 year manufacturer's warranty
  • CE marked and Kitemarked to BS EN 14604
  • Supplied with fixings; 2 x screws and 2 x rawl plugs

Carbon monoxide alarm:

  • Battery powered (AA alkaline batteries included)
  • Test and reset button feature
  • Suitable for wall mounting or free standing
  • 7 year lifespan and manufacturer's warranty
  • CE marked and Kitemarked to BS EN 50291-1:2010+A1:2012 (domestic use) & BS EN 50291-2:2010 (camping/caravans/motor homes)
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
Technical Data
Product Code 1ACODEAL1
Alternative Product Codes SA300UK, CO-FA-9B, 1ACOFA9B, 1ASA300UK
Brand First Alert
Battery Type

CO Alarm: AA batteries

Smoke Alarm: 9V alkaline


CO Alarm (HxWxD): 67x109x38mm

Smoke Alarm (HxDia): 37x110mm

Sound Output



CO Alarm: 7 years

Smoke Alarm: 5 years

Weight 0.32kg
Product Datasheets
FAQs (13)
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

Q. Can air purifiers affect ionisation smoke alarms?

Yes, air purifiers may cause ionisation smoke alarms to sound falsely.

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. What smoke alarm should I use in a bedroom with an en suite bathroom?

It is usually recommended to install an optical smoke alarm in a bedroom. This is because optical smoke alarms are slightly quicker at detecting slow smouldering fires that can originate from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than an ionisation would, if steam/water droplets were present from the bathroom. Detectors should be installed as central to the room as possible; however for your application I would also consider the position of the en suite to make sure that the detector is not in the direct path of the joining door. This is just to try and avoid the chances of a false alarm. No detector is designed for use in bathroom areas.

Q. How do I safely dispose of my old smoke alarms?

Safelincs is signed up to Valpak's WEEE (Waste Electrical and Electronic Equipment) Distributor Take-Back Scheme (Registration ID: 7370). Private households can therefore drop off their electronic and electrical fire safety waste at their municipal recycling centre when they are purchasing new products from us. To find your nearest recycling centre, please visit

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Customer Reviews

54 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: P B

Superb value, very fast delivery, highly delighted

Published on: 11th May 2018

Rating: 5 / 5 Stars

Reviewed by: G O

Nice looking compact detectors / alarms that work well and are great value for money at the price paid .

Published on: 11th May 2018

Rating: 5 / 5 Stars

Reviewed by: R P

First class products at a competitive price

Published on: 4th May 2018

Rating: 4 / 5 Stars

Reviewed by: M J

Arrived on time

Published on: 13th April 2018

Rating: 5 / 5 Stars

Reviewed by: M L


Published on: 4th April 2018

Rating: 5 / 5 Stars

Reviewed by: A P

Quality products, feel a sense of calm now I have them

Published on: 15th March 2018

Rating: 5 / 5 Stars

Reviewed by: J J

Excaellent Value for Money Bought these as a package. Small, neat and unobtrusive. Have recommended to friends and family.

Published on: 2nd February 2018

Rating: 4 / 5 Stars

Reviewed by: J F

Good buy

Published on: 30th November 2017

Rating: 5 / 5 Stars

Reviewed by: W H

Seems to do the job. Easy to set up and install

Published on: 17th July 2017

Rating: 4 / 5 Stars

Reviewed by: P H

Well made, reasonable price A must have for any home

Published on: 30th June 2017

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Direct Telephone 01507 464182