Ei3103RF Radio-Interlinked Heat Alarm - Safelincs - Approved supplier for Ei Electronics
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9V Radio-Interlinked Heat Alarm - Ei3103RF

More than 20 in stock Expected dispatch: Today
47.99 inc VAT
39.99 ex VAT
Product Overview

The Ei3103RF is an entirely wireless interlinking heat alarm from the Ei3100 series.  It is supplied as standard with a 9V alkaline battery and has full test / hush functionality.

  • 5 year Warranty
  • Wireless, interlinking smoke and heat alarms. No base plate required
  • Battery operated (9V), alkaline battery supplied as standard
  • Can interlink with all other EI radio-interlinked alarms (Please note: only the test function of accessories Ei411H and Ei410 will work with this unit)
  • Alarms that can be interlinked include:
    -   Ei3100RF, Ei3105RF
  • Suitable for installations complying to BS 5839-6: 2013 Grade F
  • Kite-marked to BS5446-1:2000
  • CE Approved
  • Test button to check performance
  • Fast responding thermistor sensor
  • If one alarm detects heat, all linked alarms will sound to give maximum warning time
  • Alarms at temperatures of  58°C and above
  • No central alarm panel needed
  • RF range 150 metres (minimum) in free space and up to 30 metres in buildings. Larger buildings can easily be covered, as the units can act as repeaters (daisy-chaining)
  • A maximum of 12 units can be interlinked
  • Digitally coded to avoid interference with neighbouring systems
  • 85db alarm (minimum) at 3m
  • Supplied with fixings; 2 x screws and 2 x rawl plugs
  • Please Note: These alarms are sold as individual units

The table below shows all the units that can interlink with the EI3103RFU.

Compatible Alarms
Model Number
Type of unit
Type of interlink
Ei3100RF Ionisation Smoke Alarm Radio-interlinked
Ei3105RF Optical Smoke Alarm Radio-interlinked
Ei650RF Battery powered optical alarm Radio-interlinked
Ei603TYCRF Battery powered heat alarm Radio-interlinked
Ei168RC/Ei141 Ionisation Smoke Alarm Radio-interlinked using the Ei168RC base
Ei168RC/Ei144 Heat Alarm Radio-interlinked using the Ei168RC base
Ei168RC/Ei146 Optical Smoke Alarm Radio-interlinked using the Ei168RC base
Ancillary Products
Model Number
Type of unit
Type of interlink
Ei407 Wireless Manual Call Point Radio-interlinked
Ei410T Remote Control Test Device Radio-interlinked
Technical Data

Technical Data

This is the technical data for the 9V Radio-Interlinked Heat Alarm - Ei3103RF.

Product Code EI3103RF
Alternative Product Codes Ei3103, Ei3103RF, Ei3103RFU
Weight 0.19kg
Dimensions (HxWxD) 140x120x45mm
Battery Type 9V Alkaline
Sound Output 85dB (minimum) at 3m
Temperature Range 0C to 40C
Humidity Range 15% to 95% Relative Humidity

Product Datasheets

The following datasheets are available for this product.

FAQs (11)

Q. Do the Ei3100RF alarms require anything other than fixing to the ceiling to install them?

A. No, with this series of radio interlinked alarms there is nothing other than pressing the house code button required to install them.

Q. If the radio interlinking signal on one unit fails will the units still work as stand alone units.

A. Yes, should the radio interlinking signal fail the units will continue to sound independently should they detect a fire.

Q. Can a wireless router interfere with the radio interlinked alarms?

A. A wireless router is very unlikely to interfere with the signal of your radio interlinked alarms, as the RF signal of the smoke alarms is digitally coded.

Q. Do the radio interlinked units give out a constant signal all the time and does this decrease the battery life more than a non-interlinked alarm?

A. Yes, radio interlinked alarms are periodically sending and receiving signals from other units in the network and therefore the life of the battery is reduced. Units with alkaline batteries should have the batteries are changed annually [unless they are fitted with a sealed 10 year battery as eg in the Ei600RF series].

Q. Do I need to take out all the batteries in my radio-interlinked alarms before adding a new alarm into the system?

A. No, you do not need to remove all the batteries. Just simply press the house code button on all the units. Please ensure that the batteries have full power as this could render the house code process incomplete.

Show all FAQs

Pricing & Availablity

Model Stock Price Weight
Product Code: EI3103RF Stock Level:
More than 20 in stock Expected dispatch: Today

47.99 inc VAT

39.99 ex VAT


Customer Reviews

12 customers have rated this product and it has an overall rating of 4.8 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: ML


Published on: 21st February 2018

5 / 5 Stars

Reviewed by: TH

Radio Interlinked is it's best selling point

Published on: 25th August 2017

5 / 5 Stars

Reviewed by: PN

Kitchen Essential

Published on: 21st July 2017

4 / 5 Stars

Reviewed by: RH

Ideal linked produce

Published on: 6th May 2017

4 / 5 Stars

Reviewed by: TH

Easy to instal, once id phoned to decode the error in the instruction leaflet. Fortunately I've not used it yet

Published on: 3rd June 2016

5 / 5 Stars

Reviewed by: -


Published on: 23rd September 2015

5 / 5 Stars

Reviewed by: -

Very pleased with the product. Excellent service. Extremely helpful staff. Thank you.

Published on: 6th April 2014

5 / 5 Stars

Reviewed by: -

easy to set up easy to set up, easy to install

Published on: 10th July 2013

5 / 5 Stars

Reviewed by: -

Good product, easy to install & setup. Happy customer so far.

Published on: 10th May 2013

4 / 5 Stars

Reviewed by: -

The test button has to be pressed for a relatively long period of time (longer than the smoke alarms) before the other interlinked alarms trigger.

Published on: 20th January 2013

5 / 5 Stars

Reviewed by: -

Published on: 6th November 2012

5 / 5 Stars

Reviewed by: -

Very happy with this unit. We have just moved house and this and other EI smoke alarms were up and running as a full interlinked system within hours.

Published on: 7th June 2010

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Delivery Options

The following delivery options are available on this product.

Economy Delivery

Delivered in 3-7 working days by Royal Mail 4.68 inc VAT - More info

Next Day Delivery

Delivered the next working day by UK Mail from 7.80 inc VAT - More info

For dispatch today order within

Radio-interlink an Ei407 manual call point

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Radio-interlink Ei3100RF series smoke alarms

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How to test your smoke and heat alarms

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Looking for more information?

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