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9V Interconnectable Heat Alarm - Ei103C

Discontinued Product

This product has been discontinued.

Product Overview

The Ei103C is a heat alarm that is best suited to kitchen and garage applications.

  • Battery operated heat alarm (alkaline battery included)
  • 5 years warranty
  • Suitable for installations complying to BS 5839-6: 2019 Grade F2
  • Kitemarked to BS 5446-2: 2003
  • CE Marked
  • Fast responding thermistor sensor
  • Alarms when reaching 54° Celsius to 62° Celsius (depends from speed of heat-up)
  • A maximum of 12 units can be interconnected via bell wire
  • Alarms that can be interconnected include:
  • Test button to check performance
  • Optional longlife lithium battery upgrade
  • Supplied with fixings: 2 x screws and 2 x rawl plugs

The table below shows all the units that can interconnect with the EI103C.

Compatible Alarms
Model Number
Type of unit
Type of interconnection
Ei100CNP Ionisation Alarm Hard wire interconnect
Ei103C Heat Alarm Hard wire interconnect
Ei105C Optical Alarm Hard wire interconnect
Ei100TYC Ionisation Smoke Alarm with 10yr Battery Hard wire interconnect
Ei3105TYC Optical Smoke Alarm with 10yr Battery Hard wire interconnect
Technical Data
Product Code EI103C
Brand EI Electronics
Back-Up Battery

9V Alkaline

Dimensions (HxWxD)


Operating Temperature

0 to 40°C

Relative Humidity

0% to 90% Relative Humidity

Sound Output


Weight 0.18kg
Product Datasheets
FAQs (3)
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 connect two smoke detectors Ei100CNP and a heat detector Ei103C using bell wire?

Yes, it is possible to connect the alarms using bell wire.

Q. Does this alarm conform to BS 5446 part 1 as recommended by the Fire Service?

BS 5446-1:2000 was withdrawn in 2008 and replaced by BS EN 14604:2005 to conform with European standards. All of our alarms containing a smoke detector (smoke only, smoke & heat, smoke & CO) are fully compliant with BS EN 14604:2005. They also comply with any other relevant standards relating to their other detection capabilities.

Customer Reviews

17 customers have given this product an overall rating of 4.6 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:

Good device, surface base (EI157) we use with this unit is getting harder to find.

Published on: 24th April 2018

Rating: 5 / 5 Stars

Reviewed by:

Works well doesn't look too bad

Published on: 22nd August 2017

Rating: 5 / 5 Stars

Reviewed by:

Good quality product

Published on: 8th February 2017

Rating: 5 / 5 Stars

Reviewed by:

Easy to fit and link to other devices (smoke alarms).

Published on: 22nd June 2016

Rating: 4 / 5 Stars

Reviewed by:

It works. Went of once in the kitchen so O.K. Did see a (gimic) product that allowed you to shout at the alarm to turn itself off. Think this is a good idea.

Published on: 27th September 2015

Rating: 4 / 5 Stars

Reviewed by:

Easy install, neat appearance, excellent price.

Published on: 1st August 2015

Rating: 4 / 5 Stars

Reviewed by:

easy to fit ,instructions satisfactory and ested okay.

Published on: 2nd January 2015

Rating: 5 / 5 Stars

Reviewed by:

Very easy to install

Published on: 23rd December 2014

Rating: 4 / 5 Stars

Reviewed by:

Easy instructions

Published on: 19th November 2014

Rating: 5 / 5 Stars

Reviewed by:

Easy to install

Published on: 11th September 2014

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