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Replacement for DETA 1111 Mains Powered Smoke Alarms

Discontinued Product - No Compatible Replacement

This product has been discontinued.

alternative product

Kidde Firex Mains Powered Alarms with Alkaline Battery

  • 230V mains powered with alkaline back-up battery
  • Available in Optical and Heat versions
  • Interlink with up to 24 units
  • Suitable for BS 5839-6: 2019 Grade D2 installations
  • Kitemarked and CE marked
  • Please note: alarms are sold individually
  • Also suitable for both the Welsh and Scottish 2022 legislation

£21.00 inc VAT

£17.50 ex VAT

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Product Overview

The DETA 1111 is a mains powered smoke alarm with a replaceable 9V alkaline back-up battery. As the DETA alarms are now discontinued, BRK have developed their 600MBX range to be fully backward-compatible with your outgoing and remaining DETA alarms and bases. The 670MBX is the ideal replacement for the 1111 alarm as it has been designed and tested to fit onto your existing alarm bases so you don’t even need an electrician.

Like the DETA 111 it replaces, the BRK 670MBX is an ionisation smoke alarm with alkaline battery backup. The ionisation sensor is best suited to detecting fast flaming fires and is typically installed in landing areas of the home. A central test/hush button makes maintenance of your alarm quick and simple. The replaceable 9V back-up battery will ensure you remain protected even in the event of a power cut.

  • Suitable for landing areas and stairwells
  • Power: 230V mains powered with back-up battery
  • Back-up Battery: 9V alkaline back-up battery (included)
  • Warranty: 5 year manufacturer's warranty
  • Fits onto your existing DETA alarm base
    • BRK push-fit base also included to keep as a spare
  • Ionisation sensor provides quick detection of fast flaming fires
  • CE and Kitemarked to BS EN 14604: 2005
  • Performs its own self-checks every 48 seconds to ensure the alarm is functioning correctly
  • Test & silence button feature
  • Product warranty and life commences from date of purchase

The simple installation process of the 670MBX replacement alarm negates the need for an electrician, though you must ensure that mains power to all interlinked alarms is turned off before beginning work. The interlink wire can carry a live electric current between alarms if they are powered from different circuits.

Compatible Alarms

Below is a table of all alarms which can be interchanged using the same base plate and interlink system. Care should be taken to ensure the correct model is purchased to replace existing alarms. Optical smoke alarms can be used in place of ionisation smoke alarms, but heat alarms and smoke alarms serve different purposes and cannot be swapped.

Original Model Type of Alarm Replacement Model
DETA 1111 Ionisation Smoke Alarm with Alkaline Battery and Twist Base DT11RA
DETA 1113 Optical Smoke Alarm with Alkaline Battery and Twist Base Discontinued
DETA 1115 Heat Alarm with Alkaline Battery and Twist Base Discontinued
DETA 1151 Ionisation Smoke Alarm with Alkaline Battery and Push Base DT51RA
DETA 1153 Optical Smoke Alarm with Alkaline Battery and Push Base Discontinued
DETA 1155 Heat Alarm with Alkaline Battery and Push Base Discontinued

Technical Data
Product Code DT11RA
Alternative Product Codes 1111, DETA1111, BRK670MBX, BRK670MBX-PUSH
Brand DETA
Back-Up Battery

Replaceable 9V Alkaline

Dimensions (HxDia)

38 x 140mm

Operating Humidity

10% to 85%

Operating Temperature

+5 °C to +38 °C

Sound Output


Weight 0.27kg
Product Datasheets

Excellent Warranty

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

Customer Reviews

3 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: 4 / 5 Stars

Reviewed by: D C

Good replacement smoke alarm I don't normally use deta smoke alarms but needed a single replacement to avoid replacing all interlinked alarms. Although only around 6 years old the existing deta alarms have been discontinued. However I managed to find this online that is the newer version of the existing model, and is compatible with all the other interlinked alarms. This site was a good find and the price was reasonable too. Delivered within the allocated time and a perfect replacement. Will definitely use safelincs again if this issue arises in the future.

Published on: 7th June 2021

Rating: 5 / 5 Stars

Reviewed by: P W

Quick delivery, product is direct replacement

Published on: 18th April 2021

Rating: 5 / 5 Stars

Reviewed by:

Exactly what was required and easy to fit.

Published on: 10th May 2020

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