Mains Radio-Interlinked Optical Smoke Alarm with Lithium Back-up - Ei166eRF - 92.27 inc VAT - Safelincs - Approved supplier for Ei Electronics
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Mains Radio-Interlinked Optical Smoke Alarm with Lithium Back-up - Ei166eRF

Lead time: 2–3 days
92.27 inc VAT
76.89 ex VAT
Product Overview

The Ei166eRF is a mains powered optical smoke alarm supplied with a RadioLINK module, allowing the unit to wirelessly interlink with up to 12 other smoke and heat alarms via radio-frequency. The wireless interlink means that no cables are required between each alarm. Fitted with a sealed 10 year re-chargeable lithium back-up battery, the Ei166eRF optical smoke alarm is ideal for applications where replacing batteries would be inconvenient.

  • 230V mains powered smoke alarm with re-chargeable lithium back-up battery
  • CE marked and Kitemarked to EN 14604: 2005
  • Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
  • Consists of a RadioLINK module and an Ei166e smoke alarm
  • Optical smoke sensor - quick to detect slow smouldering fires
  • 5 year manufacturer's warranty
  • A maximum of 12 smoke and heat alarms can be interlinked within the same system
  • Wireless interlinking - requires no cables between each unit
  • Radio-frequency range: 100m in free space, up to 30m in buildings
  • Sealed back-up battery designed to last the life of the alarm (10 years)
  • Ideal for applications where annual battery replacement would be inconvenient
  • RadioLINK module simply plugs into the back of the alarm
  • Features test and hush button facility
  • Memory feature - easy to identify an alarm that has previously activated
  • Suitable for bedrooms, living rooms and downstairs hallways
  • Supplied with fixings; 2 x screws and 2 x rawl plugs

The table below shows all the units that can interlink with the EI160eRF series.

Alarms from the Same Series
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
Compatible Alarms
Model Number
Type of unit
Type of interlink
Ei650RF Optical Alarm Radio-interlinked
EI603RF Heat Alarm Radio-interlinked
Ei168RC/Ei2110 Multi Sensor Smoke & Heat Alarm 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
Ei450 Wireless Fire and CO Alarm Controller Radio-interlinked

Wiring Explained

The radio interlinked Ei160eRF series of alarms require a 230V AC mains power supply to each unit. Up to 12 alarms can be wirelessly interlinked by radio signal.

To obtain a mains feed, each alarm can be connected to its nearest lighting circuit using 2 core and earth cable. Please note that the separate lighting circuits must have a permanent live supply to all alarms. Radio frequency signals are then used for the wireless interlink. Please see the diagram below:-

Technical Data

Technical Data

This is the technical data for the Mains Radio-Interlinked Optical Smoke Alarm with Lithium Back-up - Ei166eRF.

Product Code EI166ERF
Alternative Product Codes Ei166eRF, Ei166, Ei166e, Ei166RF
Weight 0.57kg
Back-Up Battery Re-chargeable Lithium Battery
Sound Output 85dB at 3m
Operating Temperature 0 C to +40 C
Relative Humidity 15% to 95%
Radio-Frequency Range Free Space: Up to 100m
In Buildings: Up to 30m
Dimensions Ei166e Optical Alarm: (HxDia) 54x148mm
Ei100MRF RadioLINK Module: (HxW) 37x150mm

Product Datasheets

The following datasheets are available for this product.

Pricing & Availablity

Model Stock Price Weight
Product Code: EI166ERF Stock Level:
Lead time: 2–3 days

92.27 inc VAT

76.89 ex VAT


Customer Reviews

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

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

5 / 5 Stars

Reviewed by: PH

Easy to install and set up

Published on: 15th January 2017

5 / 5 Stars

Reviewed by: SK

A good product with quick service.

Published on: 14th January 2017

Delivery Options

The following delivery options are available on this product.

Economy Delivery

Delivered in 5-10 working days by Royal Mail 4.68 inc VAT - More info

Express Delivery

Delivered in 2-3 days by our specialist courier from 7.80 inc VAT - More info

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