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Mains Powered Heat Alarm with Alkaline Back-up Battery - BRK 690MBX

£21.99 ex VAT
£26.39 inc VAT
Product Overview

Ideal for areas such as kitchens and garages where a standard smoke alarm would be unsuitable, the BRK 690MBX mains powered heat alarm is designed to detect rapid increases in room temperature. Kitemarked to the latest British Standards and with a 5 year manufacturer's warranty, the BRK 690MBX also features multi-alarm interlink, meaning that it can be hard wire interlinked with up to 12 compatible smoke and heat alarms from the 600MBX range.

  • Free next day delivery, dispatched same day if ordered before 3.00pm
  • Power: 230V mains powered with battery back-up
  • Back-up Battery: 9V alkaline battery (included)
  • Warranty: 5 year manufacturer's warranty
  • Slimline twist-fit base suitable for flush mounting
  • CE marked and Kitemarked to BS 5446-2
  • Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
  • Ideal for kitchens and garages where smoke alarms would be unsuitable
  • Monitors rate of increase in room temperature
  • Up to 12 600MBX series smoke and heat alarms can be hard wire interlinked
  • Interlinked systems provides the earliest possible warning of fire
  • Test button feature
  • Suitable replacement for the DETA 1155 and DETA 1115 Heat Alarms
  • Supplied with fixings; 2 x screws and 2 x rawl plugs

Please note: the base plate included with this alarm is not suitable for surface-mounted wiring such as trunking. Please see the BRK 790MBX with push-fit base instead.


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

600 Series

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

700 Series

Model Number Type of unit Type of interlink
760MBX Ionisation Smoke Alarm Hard wire interlink
770MBX Optical Smoke Alarm Hard wire interlink
790MBX Heat Alarm Hard wire interlink
Technical Data
Product Code BK690MBX
Alternative Product Codes BK690MBX, 690MBX, DETA1155, 1155, DETA1115, 1115
Brand BRK
Dimensions (HxDia)


Power Type

Mains powered with 9V alkaline back-up battery

Sound Output

85dB at 3m

Temperature Range

+5 °C to +38 °C

Weight 0.27kg
Product Datasheets

Pricing & Availability

Model Stock Price
Product Code: BK690MBX Stock Level:
More than 20 in stock Expected dispatch: 26th Jan

£21.99 ex VAT

£26.39 inc VAT

Delivery Options

The following delivery options are available on this product.

Free Express Delivery

Free of Charge - Orders will be delivered in 1-2 working days by Hermes

Looking for more information?

If you have any questions or would like more information about/ this product you can ask one of our specialists.

Direct Telephone 01507 464155