Mains Powered Ionisation Smoke Alarm - BRK 670MBX - £14.12 ex VAT
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Mains Powered Ionisation Smoke Alarm with Alkaline Battery Back-up - BRK 670MBX

More than 20 in stock Expected dispatch: Today
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£14.12 ex VAT
£16.95 inc VAT
Product Overview

Interlinked with up to 12 compatible alarms, the BRK 670MBX is a mains powered ionisation smoke alarm with a 9V alkaline back-up battery. The 670MBX smoke alarm is quick to detect fast flaming fires, sounding an 85dB audible warning and is typically installed in landing areas. The BRK 670MBX is Kitemarked to the latest British Standards and has a 5 year manufacturer's warranty.

  • 230V mains powered smoke alarm
  • 9V alkaline back-up battery (included)
  • CE marked and Kitemarked to BS EN 14604
  • 5 year manufacturer's warranty
  • Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
  • Quick to detect fast flaming fires
  • Ideal for landing areas
  • Up to 12 units from the 600MBX series can be hard wire interlinked
  • An interlinked system provides the earliest warning of fire
  • Test and hush button facility
  • Suitable replacement for the DETA 1151 Ionisation Alarm
  • Supplied with fixings; 2 x screws and 2 x rawl plugs

The table below shows all the units that can interlink with the BRK mains powered smoke and heat alarms.

Alarms from the Same Series

Model Number Type of unit Type of interlink
670MBX Ionisation Smoke Alarm Hard wire interlink
660MBX Optical Smoke Alarm Hard wire interlink
690MBX Heat Alarm Hard wire interlink
Technical Data

Technical Data

This is the technical data for the Mains Powered Ionisation Smoke Alarm with Alkaline Battery Back-up - BRK 670MBX.

Product Code BK670MBX
Alternative Product Codes BK670MBX, 670MBX, DETA1151, 1151
Weight 0.27kg
Dimensions (HxDia) 38x133mm
Sound Output 85dB at 3m
Back-Up Battery 9V alkaline
Operating Temperature +5 °C to +38 °C
Relative Humidity 10% to 85%

Product Datasheets

The following datasheets are available for this product.

FAQs (15)

Q. Can air purifiers affect ionisation smoke alarms?

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

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

A. 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 than can original from upholstery type materials and over-heated wiring. Also, an optical smoke alarm would be less likely to sound a false alarm than what an ionisation would do 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?

A. 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

Q. Can the mains powered smoke alarm range be connected to mains power via the lighting circuit?

A. Yes, hard-wired mains powered alarms can be wired to the unswitched live feed of the nearest frequently used lighting circuit.

Q. How long do the batteries last in smoke alarms?

A. The 9V alkaline batteries last 12~18 months. Lithium batteries will usually last 5x longer than their alkaline counterparts, achieving around 5 years lifetime. Some lithium cells are also rechargeable, and when used in a mains-powered alarm may last for the entire functional lifespan of the alarm. Newer alarm models may also feature a "sealed" lithium battery. These batteries are specialist components which are designed to not be removed or need replacing by the user, and have been tested by the alarm manufacturer to ensure they last for the lifetime of the alarm.

Please Note: the actual lifetime of your batteries depends on how often the alarms are tested or activated, as sounding the alarm draws more power than when the alarms are "waiting" to detect fire. You should also read your alarm's manual to make sure you only use the recommended types and brands of batteries, as failing to follow these instructions may cause the alarm to malfunction, not alerting you in the event of a fire, and might also invalidate the warranty.

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Pricing & Availability

Model Stock Price Weight
Product Code: BK670MBX Stock Level:
More than 20 in stock Expected dispatch: Today

£14.12 ex VAT

£16.95 inc VAT


Customer Reviews

23 customers have rated this product and it has an overall rating of 4.7 out of 5

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

5 / 5 Stars

Reviewed by: DG

Excellent smoke alarm Replacement for older BRK alarms. Slight work in order to fit due to position of mains connector, but not a big issue.

Published on: 6th October 2018

5 / 5 Stars

Reviewed by: CM

does the job...very sensitive. replaced older units in the house and was easy to fit

Published on: 5th October 2018

5 / 5 Stars

Reviewed by: GL

Excellent. Fitted by a qualified electrician we feel safe in our home.

Published on: 30th April 2018

5 / 5 Stars

Reviewed by: DB

Easy to order, arrived promptly, exactly as ordered and easy to install.

Published on: 29th April 2018

5 / 5 Stars

Reviewed by: CE

Does exactly what it says on the tin. Arrived well packaged and was easy to fit. Worked straight away, and was a great replacement for the broken one. Would recommend to anyone.

Published on: 3rd March 2018

4 / 5 Stars

Reviewed by: AK

Great replacement for now out of stock model

Published on: 26th January 2018

4 / 5 Stars

Reviewed by: RB

Very good.

Published on: 12th January 2018

5 / 5 Stars

Reviewed by: FP

Easily fitted replacement

Published on: 1st November 2017

4 / 5 Stars

Reviewed by: JR

Does what it says on the box.

Published on: 4th August 2017

5 / 5 Stars

Reviewed by: MJ

Nice unit...very easy to fit (as a refit)

Published on: 19th July 2017

5 / 5 Stars

Reviewed by: RM

replacement for an older identical unit that had failed, fitted perfectly but with an additional battery backup.

Published on: 25th June 2017

5 / 5 Stars

Reviewed by: JP

Clear instructions easy to fit, working fine so far

Published on: 8th January 2017

5 / 5 Stars

Reviewed by: AD

Easy to install as replacements

Published on: 15th November 2016

5 / 5 Stars

Reviewed by: DG

Excellent product Did the job, easy to replace old for new.

Published on: 4th November 2016

5 / 5 Stars

Reviewed by: DB

Very neat and easy to install.

Published on: 25th October 2016

5 / 5 Stars

Reviewed by: GB

Easy to fit and does the job. Back up battery is an improvement on the earlier model.

Published on: 18th October 2016

5 / 5 Stars

Reviewed by: BB

fast and easy to order through to delivery

Published on: 27th August 2016

4 / 5 Stars

Reviewed by: DH

Very easy to retro fit. My original one stopped working, I needed a replacement. The new one fitted perfectly into the wall mounting and the existing wiring.

Published on: 19th August 2016

5 / 5 Stars

Reviewed by: MA

Easy to fit, work very well, very peasedwith the product. Electrician fitted them.

Published on: 1st August 2016

4 / 5 Stars

Reviewed by: DC

Very good Service Immediate Delivery Did not fit the spacer on the ceiling as the one was to shallow so had to make a space in the ceiling to accommodate the plug

Published on: 11th July 2016

5 / 5 Stars

Reviewed by: BM

Neat and tidy, easy to fit.

Published on: 11th July 2016

4 / 5 Stars

Reviewed by: -

As expected Easy to fit

Published on: 31st December 2015

5 / 5 Stars

Reviewed by: -

Great product

Published on: 13th November 2015

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Delivery Options

The following delivery options are available on this product.

Economy Delivery

Delivered in 3-5 working days by Hermes £3.90 ex VAT

Next Working Day Delivery

Delivered the next working day by DHL £6.50 ex VAT

For dispatch today order within

Looking for more information?

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