Mains RadioLINK Relay - Ei428
OPEN 7 DAYS A WEEK 0800 612 6537 Lines open today 8am - 9pm

Mains RadioLINK Relay - Ei428

5 in stock Expected dispatch: Today
2 Customer Reviews
£58.79 inc VAT
£48.99 ex VAT
Product Overview

The Ei428 RadioLINK Relay Module is a device that switches a relay upon receipt of an alarm signal from a suitable Ei smoke/heat alarm. The electrically isolated contacts can be used for many applications such as signalling, turning on lights, etc. The Ei428 is designed to operate with all Ei radio-interlinked products (Ei168RC, Ei605 series, Ei407, Ei410 & Ei411, as well as the Ei3100 series)

  • Mains powered relay module
  • 5 year warranty
  • Wireless interconnect with up to 12 other units
  • RF range 150 metres (minimum) in free space
  • Green LED Mains Indicator Light
  • Uniquely coded to work with one system only
  • Low power cell warning in the event of a cell failure
  • Rechargeable Lithium Cell Back-up
  • Supplied complete with blank cover

The table below shows all the units that can interconnect with the EI428 relay.

Compatible Alarms

Model Number
Type of unit
Type of interconnection
Ei3100RF Ionisation Smoke Alarm Radio-interlinked
Ei3103RFU Heat Radio-interlinked
Ei3105RF Optical Smoke Alarm Radio-interlinked
Ei605TYCRF Optical Alarm Radio-interlinked
Ei603TYCRF 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
Ei168RC/Ei161RC Ionisation Alarm Radio-interlinked using the Ei168RC base
Ei168RC/Ei164RC Heat Alarm Radio-interlinked using the Ei168RC base
Ei168RC/Ei166RC Optical Alarm Radio-interlinked using the Ei168RC base
Ei168RC/Ei2110 Multi Sensor Smoke & Heat Alarm Radio-interlinked using the Ei168RC base
Technical Data

Technical Data

This is the technical data for the Mains RadioLINK Relay - Ei428.

Product Code EI428
Weight 0.18kg
Dimensions (HxDia) 26x141mm
FAQs (1)

Q. How can I add an external siren to a Ei radio-frequency smoke alarm system?

A. Use a mains powered RF relay Ei428 to operate a main powered sounder ACY03. The RF relay is capable to pick up the signals of any RF smoke/heat alarm from Ei Electronics/Aico.

Pricing & Availability

Model Stock Price
Product Code: EI428 Stock Level:
5 in stock Expected dispatch: Today

£58.79 inc VAT

£48.99 ex VAT

Customer Reviews

2 customers have 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: 4 / 5 Stars

Reviewed by: -

Great product, easy to install.

Published on: 3rd November 2013

Rating: 5 / 5 Stars

Reviewed by: -

Used this to link into the existing DSC alarm

Published on: 27th June 2012

Delivery Options

The following delivery options are available on this product.

Economy Delivery

£4.68 inc VAT - Delivered in 2-3 working days by Hermes

Next Working Day Delivery

£7.80 inc VAT - Delivered the next working day by Hermes

For dispatch today order within

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
Direct Email Email Now


Close close

This site uses cookies to improve your experience and for essential functioning of the site. By continuing to use our site you agree to the use of cookies.

Change your cookie settings at any time by clicking on the button at the bottom of each page. Read more about the cookies we use in our Privacy Policy.

By continuing to browse this site you agree to the use of cookies. Read our privacy policy to learn more.