Screwfix Logo
Activating the button will move focus to the expanded search input field
British General  SDMCO Mains Standalone Interconnecting CO Alarm
British General

British General SDMCO Mains Standalone Interconnecting CO Alarm (477PF)

Delivery available to mainland GB only, (offshore and Northern Ireland is not available). Order by 2pm for a next working day delivery. Orders placed after 2pm will be delivered within 2 working days.

Mains-powered CO alarm with 9V back-up, ideal for the detection of carbon monoxide gas from any source of combustion. Alarm will activate alerts when dangerous levels of CO are found in the air. Can be wall-mounted. Alarm can be hardwire interlinked with other BG alarms. Can connect up to 12 alarms. Suitable for use in rooms containing a fuel-burning appliance.

  • Interlinked when Hardwired
  • Compliant with Standard
  • 220-240V AC Mains-Powered with Battery Backup
  • 9V Battery Supplied
  • 85dB Alarm at 3m
  • Test/Hush Button
More Info

View all: British General Carbon Monoxide Detectors

£74.99Inc Vat

Add to basket for...

Delivered by our approved supplier,

Add to saved list…

You may also like:

Alarm Sensor TypeElectrochemical
Alarm Triggering Gas Level30 ppm
Battery DurationReplaceable
BrandBritish General
Current TypeAC
Fixings SuppliedBrackets & Fixings Supplied
Interlinked CompatibilityAlarm can be hardwire interlinked with other BG alarms
Low Battery IndicatorLow Battery Indicator
Manufacturer Guarantee1 Year Guarantee
Noise Level at 3m85 dB
Operating Temperature0-40 °C
Pack Size1
Pieces in Pack/Case1
Power InputMains
Power TypeMains-Powered with Battery Backup
Power Voltage Supply220-240 V
Product TypeInterconnecting CO Alarm
Suitable Room TypeSuitable for use in rooms containing a Fuel-Burning Appliance

Delivered direct from our suppliers in the number of working days stated on the delivery button

Direct from our supplier delivery restrictions

Geographic restrictions apply, check your postcode below to see if any apply to you. For some locations delivery may take longer than the specified delivery time, and we can not currently offer delivery to offshore addresses.

Please ensure we have your mobile phone number when you order so we can keep you updated with deliveries.


Please note - If you wish to return this item you will need to call us on our freephone number 03330 112 112 to arrange a free collection.


Were we able to answer your question? If not please Contact Us.