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Replacement for DETA 1115 Mains Powered Heat Alarm

Discontinued Product - No Compatible Replacement

Please Note: The manufacturer has withdrawn from the European market and there is no compatible alternative that will fit onto your existing. Since it is not possible to interlink alarms from different manufacturers, new alarms will be needed throughout. The recommended replacement for the whole discontinued DETA range is the Kidde Firex series. This will require an electrician to replace your old DETA bases with new Kidde bases.

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 1115, which has been discontinued by the manufacturer, is a mains powered heat alarm with 9V alkaline battery back-up. To ensure that DETA 1100 series alarm owners can continue to update their systems, BRK have developed their range of alarms to be completely compatible with existing DETA alarm bases. This means that you don't even need an electrician to install the replacement.

The recommended direct replacement for the DETA 1115 is the BRK 690MBX. This too is a mains powered heat alarm with alkaline battery back-up. Heat alarms are ideal for locations where smoke alarms may be falsely triggered by regular household fumes such as kitchens and garages. The new alarm features a dedicated test & hush button, and user replaceable 9V alkaline backup battery.

The simple installation process of the 690MBX replacement alarm negates the need for an electrician, though you must ensure that mains power to all interlinked alarms is cut 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 DT15RA
Alternative Product Codes 1115, DETA1115, BRK690MBX, BRKEHA
Brand DETA
Back-Up Battery

Replaceable 9V Alkaline

Dimensions (HxDia)

58 x 140mm (including base)

Operating Temperature

+5 °C to +38 °C

Relative Humidity

10% to 85%

Sound Output


Weight 0.31kg
Product Datasheets

Key Product Features

The 690MBX will interlink with your remaining DETA alarms

LED indicators show power supply and alarm activity status

Combined Test-Hush button to check function & silence alarms

Made by the original alarm manufacturer

What's Included?

Every DETA DT15RA is supplied with the following components.

  • 1 x BRK 690MBX heat alarm
  • 1 x 9V replaceable alkaline battery
  • 1 x Spare twist-fit base
  • 1 x Screw fixing set (screws & rawl plugs)
  • 1 x Instruction manual

Excellent Warranty

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

Looking for more information?

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

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