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Mains Powered Optical Smoke Alarm with Back-Up Battery - Ei146

From: £22.99 ex VAT
(£27.59 inc VAT)
Show prices and availability
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Mains powered optical smoke alarm from EI
  • Battery backup in case of power failure (alkaline battery included)
  • Available in two versions:
  • 5 year warranty
  • A maximum of 12 units can be interconnected via 3 core interconnection cable
  • Other smoke alarms that can be interconnected include:
  • Kitemarked to BS EN 14604:2005
  • Suitable for installations complying to BS 5839-6: 2013 Grade D, E and F
  • CE marked
  • Hush button for false alarm control
  • Low battery LED indicator
  • Separate mains and warning LEDs

The table below shows all the units that can interconnect with the EI146RC.

Alarms from the Same Series
Model Number
Type of unit
Type of interconnection
Ei141RC Ionisation Alarm Hard wire using 3 core interconnection cable
Ei144RC Heat Alarm Hard wire using 3 core interconnection cable
Ancillary Products
Model Number
Type of unit
Type of interconnection
Y03 Multi Frequency Sounder Hard wire using 3 core interconnection cable
MCP401RC Manual Call Point Hard wire using 3 core interconnection cable
Ei1529RC Smoke Alarm Locate, Hush and Remote Test Switch Hard wire using 3 core interconnection cable

This is the technical data for the Mains Powered Optical Smoke Alarm with Back-Up Battery - Ei146.

Back-Up Battery 9V Alkaline
Sound Output 85dB (minimum) at 3m
Humidity Range 15% to 95% Relative Humidity
Dimensions (HxDia) 50x152mm
Temperature Range 0°C to +40°C

Technical Data Sheets

The following technical data sheets are available for this product:

Q. For mains powered Aico smoke and heat alarms, when the electricity supply fails and the back up battery takes over, please can you tell me how long the battery will last in this situation?

A. For mains powered Aico alarms with a new, fully charged lithium back up battery, the battery would last approx. 3-6 months without a mains supply. For mains powered Aico alarms with a standard alkaline back up battery, the battery would last up to a year without mains supply. If the alarm has been installed with an Ei168RC radio frequency base, please note that the Ei168RC back up battery would last approx 2 months if the power fails.

Q. My detector does not have "RC" stated at the end of the code. What does this stand for?

A. The RC just refers to "Remote Control" as the unit can be fitted to a radio-frequency base for interconnection. The model hasn't changed but the manufacturers changed the product code slightly in reference to this.

Q. Can I upgrade an existing Ei140 series base with a Ei160 series smoke alarm?

A. Yes, the bases for the Ei140 and Ei160 series are identical units and are interchangeable.

Q. How do you wire in the Ei140/Ei160 series of smoke alarms?

A. To wire the units correctly you would use 2 core and earth cable to the first unit and 3 core and earth to the interconnected units. The alarms do not have to be earthed but a brass screw connector is provided so that the earth can be safety terminated.

Q. Can I link a CO detector with a Ei140 smoke alarm?

A. Yes, we recommend the Ei261EN. You should also install a Ei159 locator to allow you to find out if the alarm was triggered by CO gas or by fire.

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Looking to replace an old alarm?

Why not use one of our fully certified easichange DIY kits? Find out more

Pricing & Availability

Model Stock Levels Prices Weight
Ei146EK Replacement Detector Head Kit
Product Code: EI146EK
In Stock

£22.99 ex VAT

(£27.59 inc VAT)

0.35kg

Ei146RC Optical Smoke Alarm
Product Code: EI146RC
In Stock

£23.99 ex VAT

(£28.79 inc VAT)

0.35kg

Customer Reviews

18/Aug/2014
Reviewed by:
Very good service one was faulty changed straight away
06/Jul/2014
Reviewed by:
Certainly not as annoyingly sensitive as the ironisation one
30/Dec/2013
Reviewed by:
Easy to find product using the internet,replaced and workingin minutes
10/Sep/2013
Reviewed by:
Easy to Fit Replacement
09/Sep/2013
Reviewed by:
Excellent product, easy installation. If this is a new installation, you need to remember to buy the seperate base plate.

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