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Radio-Interlinked Battery Powered Optical Smoke Alarm - Ei3105RF

Discontinued Product

This product has been discontinued and is no longer available to buy.

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Product Overview
The Ei3105RF is an entirely wireless, interconnectable optical smoke alarm from the Ei3100 series. If one alarm detects smoke, all alarms go off to give maximum warning time
  • Wireless, interconnectable smoke alarm. No base plate required
  • Battery powered smoke alarm (alkaline battery included)
  • A maximum of 12 units can be interconnected
  • 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)
  • 5 year Warranty
  • Kitemarked to BS EN 14604:2005
  • Suitable for installations complying to BS 5839-6: 2013 Grade F
  • CE marked
  • Suitable for home or office
  • 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)
  • Alarms that can be interconnected include:
    -   Ei3100RF, Ei3103RFU
  • Digitally coded to avoid interference with neighbouring systems
  • Hush button for false alarm control
  • Auto self-test feature continually monitors the sensor every 40 seconds for additional safety
  • No central alarm panel needed
  • Optional longlife lithium battery upgrade
  • Please Note: These alarms are sold as individual units

The table below shows all the units that can interconnect with the EI3105RF.

Compatible Alarms
Model Number
Type of unit
Type of interconnection
Ei3103RFU Heat Radio-interlinked
Ei3100RF Ionisation Smoke 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 interconnection
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 Radio-Interlinked Battery Powered Optical Smoke Alarm - Ei3105RF.

Product Code EI3105RF
Weight 0.22kg
Dimensions (HxWxD) 140x120x45mm
Battery Type 9V Alkaline
Sound Output 85dB (minimum) at 3m
Temperature Range 0 to 40°C
Humidity Range 15% to 95% Relative Humidity
FAQs (13)
Q. Do the Ei3100RF alarms require anything other than fixing to the ceiling to install them?

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.

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 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?

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?

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.

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Customer Reviews

10 customers have 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:

Easy to install and set up

Published on: 14th November 2015

Rating: 5 / 5 Stars

Reviewed by:


Published on: 23rd September 2015

Rating: 5 / 5 Stars

Reviewed by:

Easy installation, configuration & good value. Purchased this as an add-on to the EI3100KIT as an alarm in the other side of the L-shaped lounge/diner. Well worth the belt & braces value.

Published on: 17th January 2015

Rating: 5 / 5 Stars

Reviewed by:

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

Published on: 6th April 2014

Rating: 4 / 5 Stars

Reviewed by:

tested it and it is working well

Published on: 24th January 2014

Rating: 5 / 5 Stars

Reviewed by:

Connects with other wireless alarms with no problems

Published on: 5th August 2013

Rating: 5 / 5 Stars

Reviewed by:

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

Published on: 10th July 2013

Rating: 5 / 5 Stars

Reviewed by:

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

Published on: 10th May 2013

Rating: 5 / 5 Stars

Reviewed by:

Published on: 16th August 2012

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