CALL OUR TEAM NOW 0800 612 6537 Lines open today 8:30am - 12:30pm

10 Year Longlife Battery Radio-Interlinked Heat Alarm - EI603TYCRF

EI603TYCRF Radio-Interlink Heat Alarm

Discontinued Product

This product has been discontinued.

alternative product

Ei603RF 10 Year Wireless Heat Alarm

  • Battery: Built-in, lasts the lifetime of your alarm
  • Warranty: 5 year warranty
  • Radio-interlinked heat alarm
  • Built-in RadioLINK+ repeater function
  • Self-tests every 16 seconds
  • Twist-on base design for simple installation
  • Suitable for BS 5839-6: 2019 Grade F1
  • Kitemarked to BS 5446-2: 2003
  • Also suitable for the 2022 Scottish legislation

£80.99 inc VAT

£67.49 ex VAT

View Product
Product Overview

The battery operated radio-interlinked heat alarm is perfect for kitchens and areas where smoke alarms are prone to cause false alerts.  The alarm is easy to fit and can be radio-interlinked with up to 11 other units.

  • Powered by a 10 year sealed lithium battery
  • 5 year manufacturer's warranty
  • RF range 150 metres (minimum) in free space and up to 30 metres in buildings
  • Built-in radioLINK repeater function allows for the RF signal to work around obstructions
  • A maximum of 12 radio-interlinked smoke alarms or heat alarms can be installed
  • Suitable for installations complying to BS 5839-6: 2013 Grade F
  • Kitemarked to BS EN5446-2:2003
  • CE marked
  • LED power indicator
  • Battery 'low' warning
  • With test button
  • Compatible with all other Ei radio-interlinked alarms
  • Digitally coded to avoid interference with neighbouring systems
  • Requires no cables between units and no power supply
  • Supplied with RF module
  • Easy-to-fit RF module needs connecting before installation
  • Supplied with fixings; 2 x screws and 2 x rawl plugs

The table below shows all the units that can interlink with the EI603TYCRF.

Alarms from the Same Series
Model Number
Type of unit
Type of interlink
Ei650RF Battery powered optical alarm Radio-interlinked
Ei603TYCRF Battery powered heat alarm Radio-interlinked
Compatible Alarms
Model Number
Type of unit
Type of interlink
Ei161eRF Ionisation Smoke Alarm Radio-interlinked using the Ei100MRF module
Ei164eRF Heat Alarm Radio-interlinked using the Ei100MRF module
Ei166eRF Optical Smoke Alarm Radio-interlinked using the Ei100MRF module
Ei2110eRF Multi Sensor Smoke & Heat Alarm Radio-interlinked using the Ei100MRF module
Ei168RC/141RC Mains powered ionisation alarm (Alkaline back up) Radio-interlinked using the Ei168RC base
Ei168RC/144RC Mains powered heat alarm (Alkaline back up) Radio-interlinked using the Ei168RC base
Ei168RC/146RC Mains powered optical alarm (Alkaline back up) Radio-interlinked using the Ei168RC base
Carbon Monoxide Alarms
Model Number
Type of unit
Type of interlink
Ei208WRF Battery powered CO detector Radio-interlinked
Ei262 Mains powered CO detector Radio-interlinked
Ancillary Products
Model Number
Type of unit
Type of interlink
Ei407 Wireless Manual Call Point Radio-interlinked
Ei411H Wireless Locate, Hush and Remote test switch Radio-interlinked
Ei412 Wireless Fire and CO Alarm Control Switch Radio-interlinked
Ei450 Wireless Fire and CO Alarm Controller Radio-interlinked
Technical Data
Product Code EI603TYCRF
Alternative Product Codes Ei603, Ei603RF, Ei603TYC
Brand EI Electronics
Battery Type

Longlife Lithium

Dimensions (HxWxD)


Operating Temperature

0°C to 40°C

Relative Humidity

15% to 95% Relative Humidity

Sound Output


Weight 0.20kg
Product Datasheets
FAQs (8)
Q. How can we test the alarm to make sure it is working?

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

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. Do the Ei600 series alarms need 230v or do they just use battery?

The Ei600 series of radio-interlinked alarms are completely battery operated. This means that they do not need to be wired up to the mains circuit. On the website, we offer the Ei600 series with a standard 9v battery or with a 10 year lithium longlife battery. The standard 9V batteries last approximately 12-18 months depending on how often the detectors are tested. The lithium battery units are sealed and last 10 years i.e. the full lifespan of the detector.

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?

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. 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].

Show All

Customer Reviews

8 customers have given this product an overall rating of 4.5 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: 5 / 5 Stars

Reviewed by:

Recommended the use of these before and now I have bought them myself.

Published on: 2nd May 2017

Rating: 5 / 5 Stars

Reviewed by:

excellent when you have no ceiling void No wiring.

Published on: 30th January 2017

Rating: 5 / 5 Stars

Reviewed by:

Easy to fit, slightly tricky to set up, but works well.

Published on: 28th October 2016

Show More

Looking for more information?

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

Live Chat Available Now
Direct Telephone 01507 464181


Colour Scheme


Pricing Display



By continuing to browse this site you agree to the use of cookies.