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Mains Powered Ionisation Smoke Alarm with Alkaline Battery Back-up - BRK 670MBX

65 Customer Reviews
£19.96 inc VAT
£16.63 ex 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.

  • Power: 230V mains powered with back-up battery
  • Backup: 9V alkaline battery (included)
  • Warranty: 5 year manufacturer's warranty
  • Please note that BRK are no longer manufacturing new stock for the European Market and while the products will have a 2018 manufacturing date they still provide a full 10 year lifespan and full warranty cover from date of purchase
  • Includes push-fit base suitable for flush mounting or surface trunking
  • CE marked and Kitemarked to BS EN 14604
  • Suitable for installations complying to BS 5839-6: 2019 Grade D2
  • 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 and DETA 1111 Ionisation Alarms
  • Can also be used to replace 86RACE alarms (may need rewiring)
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
  • Product warranty and life commences from date of purchase

Please note: the packaging may show a product code of 770MBX and include a push-fit base but the alarm itself is still a 670MBX, as shown on the sticker on the back of the alarm head, and it is still compatible with existing twist-fit bases. If you are having difficulties with the removal of the alarm from the push-fit base, please see our video that demonstrates the removal.

Interlink

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
Product Code BK670MBX-PUSH
Alternative Product Codes BK670MBX, 670MBX, DETA1151, 1151, DETA1111, 1111, 86RACE
Brand BRK
Back-Up Battery

9V Alkaline

Dimensions (HxDia)

38x133mm

Operating Temperature

+5°C to +38°C

Relative Humidity

10% to 85%

Sound Output

85dB

Warranty

5 Years

Weight 0.27kg
Product Datasheets
FAQs (13)
Q. Do I need an ionisation or optical smoke alarm?
A.

We recommend using an optical smoke alarm in hallways, as these are less likely to go off because of cooking fumes from a connected kitchen. Optical smoke alarms are also ideal for living rooms, dining rooms, bedrooms, as they are good at detecting smouldering fires from soft furnishings. For landings we recommend ionisation alarms. Heat alarms are designed for kitchens and garages. No alarms should be installed in bathrooms.

Q. Why do your mains powered alarms have batteries?
A.

All our mains powered alarms have a battery backup. Although mains powered alarms without this option do exist (BS5839 part 6 grade E), we regard them as far too dangerous, as a lot of fires are caused by electrical faults leaving the building unprotected against fire if the smoke alarms have no backup battery. With our mains powered alarms you will always be protected.

Q. Can I put my smoke alarm on the wall, or must it be mounted on the ceiling?
A.

The best location to install your smoke alarm is in the centre of the ceiling rather than on the wall. During a fire, smoke initially rises and then spreads to the sides of the room. By installing the alarm on the ceiling, this ensures that you receive the earliest possible warning of a fire.

Q. What is the best way to test my alarm?
A.

We recommend testing alarms by pressing the test button built-in to the unit, as this is designed to simulate the detection of the target stimuli (usually smoke, heat, or CO) at the alarm sensor. You should test your alarms regularly to ensure they are protecting building occupants, preferably every week. For more detailed guidance, check the manual included with your alarm.

Q. How long do smoke alarms last before needing replacement?
A.

It is recommended that smoke alarms are replaced after 10 years. This is because the sensors in the smoke alarms become less sensitive and may not activate when a fire is present.

Q. Do you need an electrician to connect mains powered smoke alarms?
A.

It is necessary that an electrician installs mains powered smoke alarms.

Q. When the test button is pressed on an interlinking smoke alarm will this cause all the other units to go off, too?
A.

Yes, by pressing the test button on one alarm all the units in that family will also be activated. To 'teach' the units which other smoke alarms belong to the same family, the smoke alarms have to be set up together during the installation. This is done by pressing a 'housecoding button' or similar process.

Q. If a false alarm goes off can pressing the hush button on any of the interlinking alarms stop all the units beeping?
A.

No, to stop the alarms from sounding the hush button on the unit that started the process needs to be pushed. Pressing any other unit will just silence that one unit. The unit can be identified by the rapidly flashing red LED.

Q. Can a smoke alarm be fitted with a sticky adhesive pad in a let property?
A.

The sticky pad is suitable for all battery operated smoke alarms. However, we cannot judge if battery alarms are suitable for your let property, as let properties usually require mains powered alarms. There is some advice to this in the governments guides to fire risk assessments. http://www.safelincs.co.uk/Fire-Risk-Assessment/
Also see the LACoRS guide for let properties.

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.

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. Can air purifiers affect ionisation smoke alarms?
A.

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

Q. What sort of smoke alarm system would I need to install for a HMO?
A.

BS 5839-6 recommends that one or two storey HMOs with an individual floor area of no more than 200sqm (not the total of both floors) should have a Grade D smoke alarm system installed. Grade D refers to mains powered smoke alarms with a back up battery power supply. The alarms can be interlinked either by wire or by radio signal and the system does not require a separate fire alarm panel. For HMOs of 3 storey or higher, a Grade A panel system would need to be installed. This can cover the whole of the building, or can be used just for the communal areas with a separate Grade D system installed for the individual dwellings. For both applications, the level of cover should be a minimum of LD3 (in all escape routes) but this may change according to the fire risk assessment.

Pricing & Availability

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

£19.96 inc VAT

£16.63 ex VAT

Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.79 inc VAT - Orders will be delivered in 3-5 working days by Hermes

Express Delivery

£7.91 inc VAT - Orders will be delivered in 1-2 working days by Hermes

Excellent Warranty

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

Customer Reviews

65 customers have given this product an overall rating of 4.8 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: 4 / 5 Stars

Reviewed by: S W

Feeling safe again. I had hoped to be able to fit this myself as it was a replacement for one that was 10 years old but I found the slight change of design meant I had to get an electrician in. Sorted now though and it is good to know we are safe at home.

Published on: 25th March 2021

Rating: 5 / 5 Stars

Reviewed by: A W

Very easy to fit over the old bases Improved design

Published on: 7th March 2021

Rating: 4 / 5 Stars

Reviewed by: D M

Hopefully will be reliable for 10 years

Published on: 26th February 2021

Rating: 4 / 5 Stars

Reviewed by: N O

Good product, delivered on time undamaged

Published on: 28th January 2021

Rating: 5 / 5 Stars

Reviewed by: J K

Excellent Was able to replace old with new in minutes.

Published on: 18th January 2021

Rating: 5 / 5 Stars

Reviewed by: R B

Exact match at fair price Exact replacements, fair prices, good delivery options.

Published on: 10th December 2020

Rating: 5 / 5 Stars

Reviewed by: D C

REPLACED 10YEAR UNITS GOOD EASY REPLACEMENT

Published on: 24th November 2020

Rating: 4 / 5 Stars

Reviewed by: C W

Safety is a priority!

Published on: 13th August 2020

Rating: 4 / 5 Stars

Reviewed by: J H

Perfect replacement for existing alarms N/A

Published on: 3rd August 2020

Rating: 5 / 5 Stars

Reviewed by: K W

Straight forward transaction Got what I wanted with no fuss and a quick delivery, perfect.

Published on: 7th May 2020

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