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Mains Powered Ionisation Smoke Alarm with Lithium Back-up Battery - Ei161e

From: 26.89 ex VAT
32.27 inc VAT
Product Overview

Supplied complete with Easi-fit base for ease of installation, the Ei161e is a 230V mains powered ionisation smoke alarm with a 10 year sealed rechargeable lithium back-up battery. Quick to detect fast flaming fires, the Ei161e is ideal for households, HMOs and other applications needing to comply with BS 5839-6 Grade D, E or F. The ionisation smoke alarm can be used as a stand-alone unit, or hard-wire interconnected with up to 12 Ei160e series alarms within a single system.

  • 230V mains powered smoke alarm with re-chargeable lithium back-up battery
  • CE marked and Kitemarked to BS EN 14604:2005
  • Available in two versions:
  • 5 year manufacturer's warranty
  • Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
  • Up to 12 units can be hard-wire interconnected within the same system
  • Simply plug in an optional RadioLINK+ module - Ei100MRF for wireless interconnection
  • Ionisation smoke sensor - quick to detect fast flaming fires
  • Sealed back-up battery designed to last the life of the alarm (10 years)
  • Ideal for use where it would be inconvenient to annually replace batteries
  • Supplied with Easi-fit base for quick installation
  • Test and hush button facility
  • Memory feature - easy to identify an alarm that has previously activated
  • Suitable for upstairs landing areas
  • Supplied with fixings; 2 x screws and 2 x rawl plugs

Please Note: The simple installation process of the easichange replacements kits negates the need of an electrician.


The table below shows all the units that can interconnects with the Ei160e series of alarms.

Alarms from the same series
Model Number
Type of unit
Type of interconnection
Ei166e Optical Alarm Hard-wire Interconnect
Ei164e Heat Alarm Hard-wire Interconnect


Multi Sensor Smoke & Heat Alarm Hard-wire Interconnect
Compatible alarms
Model Number
Type of unit
Type of interconnection
Ei166RC Optical Alarm Hard-wire Interconnect
Ei164RC Heat Alarm Hard-wire Interconnect


Multi Sensor Smoke & Heat Alarm Hard-wire Interconnect
Ancillary Products
Model Number
Type of unit
Type of interconnection
Y03 Multi Frequency Sounder Hard-wire Interconnect
Ei1529RC Smoke Alarm Locate, Hush and Remote Test Switch Hard-wire Interconnect
MCP401RC Manual Call Point Hard-wire Interconnect

Wiring Explained

The Ei160e series of smoke and heat alarms require a 230V AC mains power supply. Up to 12 alarms can be hard wire interconnected on one circuit.

To obtain a mains feed, the first alarm can be connected to the nearest lighting circuit using 2 core and earth cable. From this alarm, 3 core and earth cable is required for all additional alarms, which allows for the hard wire interconnection to work. Please see the diagram below:-


Alternatively, the alarms can be hard wired using a dedicated circuit from the distribution board.

Technical Data

This is the technical data for the Mains Powered Ionisation Smoke Alarm with Lithium Back-up Battery - Ei161e.

Back-Up Battery Re-chargeable Lithium Battery
Sound Output 85dB at 3m
Operating Temperature 0 C to +40 C
Relative Humidity 15% to 95%
Dimensions (HxDia) 54x148mm
Weight 0.4kg

Data Sheets

Pricing & Availability

Model Stock Levels Price Weight
Ei161EK Replacement Detector Head Kit
Product Code: EI161RCEK
Lead Time: 2–3 days

26.39 ex VAT

31.67 inc VAT

Ei166e Ionisation Smoke Alarm
Product Code: EI161E
More than 20 in stock

26.89 ex VAT

32.27 inc VAT


Customer Reviews

2 customers have rated this product and it has an overall rating of 4.5 out of 5

All our reviews are written by real customers that have purchased this product from us and are publsihed without modification.

5 / 5 Stars

Reviewed by: LH

As describec

Published on: 14th February 2017

4 / 5 Stars

Reviewed by: AP

Easy replacement on same mounts as earlier model and more sensitive,

Published on: 6th January 2017

Delivery Options

The following delivery options are available on this product.

Economy Delivery

Delivered in 2-3 working days by Royal Mail from 3.90 ex VAT - More info

Express Delivery

Delivered in 0-0 days by our specialist courier from 6.50 ex VAT - More info

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