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9V Radio-Interlinked Heat Alarm - Ei3103RF

In Stock
£45.09 ex VAT
£54.11 inc VAT
Product Overview

The Ei3103RF is an entirely wireless interconnectable 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, interconnectable 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 interconnected 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 connected 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 interconnected
  • Digitally coded to avoid interference with neighbouring systems
  • 85db alarm (minimum) at 3m
  • Please Note: These alarms are sold as individual units

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

Compatible Alarms
Model Number
Type of unit
Type of interconnection
Ei3100RF Ionisation Smoke Alarm Radio-interlinked
Ei3105RF Optical 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

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

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

Technical Data Sheets

The following technical data sheets 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.

Q. Where more than one radio-interlinked battery operated smoke alarm is installed, if the battery in one alarm failed would the other alarms be affected?

A. If one alarm was to malfunction the other units would not be affected, if it was due to alarm failure. If the fault was with the radio-interlinking signal, then all alarms that are in the chain after the faulty alarm would be affected and they would not go off.

Q. Are the battery radio-interlinked smoke alarms suitable to install in a four storey house with thick walls?

A. Our radio-interlinked smoke detectors have a radio frequency range of about 30 meters in buildings. This means that as long as the detectors are all within 30 meters of each other, the interconnection should be achieved. Some of the RF smoke alarms can also act as repeaters, which means that larger distances can be achieved. So, a four storey house should normally be suitable for RF install.

Q. Is it possible to have a heat alarm mains powered radio interlinking alarm interconnect with battery powered radio-interlinked alarms?

A. Yes this entirely possible. The Ei140 series with RF base is mains powered and these are compatible to interlink with the battery operated Ei3100 series. Please view the interconnection overview on either of these alarms for further details.

Q. How can we test the alarm to make sure it is working?

A. The manufacturer's recommendation is to test the alarm by pressing the test button. This will simulate a heat input at the heat sensor. You can also test it with a hair dryer but make sure that the hairdryer is kept away at a suitable distance from the alarm. Do not attempt to test the alarm by using open fire or excessive heat as this may damage the unit.

Q. Do the three types of Ei3103 alarms interconnect with each other?

A. Yes, the Ei3103 range, Ei3100RF - Ionisation Smoke Alarm Ei3105RF - Optical Smoke Alarm Ei3103RFU - Heat Alarm, interconnect with each other. If one sounds it will send a radio-signal to the other units and they will then be activated.

Q. Are there any restrictions to the distance a radio-interlinked smoke alarm will work?

A. Most radio-interlinked alarms have a range of 150 meters in an open space and up to 30 meters in buildings. The thickness of the walls and partitions will affect the travel distance of the signal.

Pricing & Availability

Model Stock Levels Price Weight
Product Code: EI3103RF
In Stock

£45.09 ex VAT

£54.11 inc VAT


Customer Reviews

7 customers have rated this product and it has an overall rating of 4.9 out of 5

All our reviews are written by real customers that have purchased this product from us. We publish all customer reviews, even the bad ones!

5 / 5 Stars

Reviewed by: AM


Published on: 23rd September 2015

5 / 5 Stars

Reviewed by: SC

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

Published on: 6th April 2014

5 / 5 Stars

Reviewed by: CD

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

Published on: 10th July 2013

5 / 5 Stars

Reviewed by: AH

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

Published on: 10th May 2013

4 / 5 Stars

Reviewed by: KR

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

Show All Reviews

Product Videos

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