Mains Powered Optical Smoke Alarm with Alkaline Back-up Battery - Aico Ei146e
The Ei146e mains powered optical smoke alarm from EI Electronics is the upgrade to the Ei146RC detector. The new model features a sleek new design, sealed insect mesh, and automatic dust compensation for improved resistance to false alarms. Full backward compatibility with all devices used with the previous versions, including the Ei1529RC remote control switch and Ei168RC wireless base, means adding it to an existing Ei140/160/3000 system or replacing an old alarm is quick, easy, and reliable.
- Power: 230V mains powered with back-up battery
- Backup Battery: 9V alkaline battery (included)
- Warranty: 5 year warranty
- Supplied with Easi-Fit base for quick installation by your electrician
- Alarm head can be used to replace an old Ei146 or Ei146RC model without replacing the base
- All the new technology is in the detector head
- Keep your new base as a spare
- Interlink up to 12 units in a single system via 3 core cable
- Part of the new E Series also featuring the Ei144e heat alarm
- Kitemarked to BS EN 14604: 2005
- Suitable for installations complying with BS 5839-6: 2019 Grade D2
- CE marked
- Hush button for false alarm control
- Separate mains and warning LED indicators
- Supplied with fixings; 2 x screws and 2 x rawl plugs
- This alarm is also suitable for both the Welsh and Scottish updated 2022 legislation
Customer Reviews (95)
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.
Reviewer
A W
Published on
5th August 2026
Reviewer
P K
Great item, easy to install and to replace the failed old unit
Published on
29th July 2026
Reviewer
B W
Well, it’s not worked in anger yet, hopefully never !!! It fitted to old base superbly, as your staff advised me. The person answered my question, why can’t other companies do the same. ???
Published on
18th July 2026
Technical Data
| Product Code | EI146E |
|---|---|
| Brand | Ei Electronics |
| Manufacturer's Part Number | EI146E |
| Approvals & Markings | CE Marked |
| Back-Up Battery Type | Alkaline |
| Battery Type | 9V Battery |
| British Standard Grade | Grade D2: Mains Powered (replaceable backup) |
| Colour | White |
| Compliance | BS 5839-6 |
| BS EN 14604: 2005 | |
| Connection | Wired |
| Display | LED Indicators |
| Fixing Options | Screws (included) |
| Installation Position | Ceiling |
| Local Legislation | Scottish Legislation (2022) |
| Welsh Legislation (2022) | |
| Material | Plastic |
| Maximum Number of Linked Devices | 12 Devices |
| Operating Temperature | -10°C To +40°C |
| Positioning | Bedrooms |
| Hallways | |
| Living Rooms | |
| Power Type | Mains Powered (230V) |
| Product Range | Aico Ei140e Series |
| Recyclable | Yes - Valpak's WEEE Distributor Take-back Scheme |
| Relative Humidity | 15% To 95% |
| Sensor Type | Optical |
| Sound Level | 85dB |
| Suitability | Home |
| Warning Type | Audible - Alarm Sounder |
| Warranty | 5 Years |
| Dimensions (Unit) |
|
| Weight | 350g |
| Datasheets |
Interlink
| Product Code | Description | Interlink Type |
| Ei140 Series | Mains Powered with Alkaline Back Up Battery | |
| Ei144e | Heat Alarm | Hardwire Interlink |
| Ei146e | Smoke Alarm | Hardwire Interlink |
| Ei144eRF | Heat Alarm | Hardwire / Radio Interlink |
| Ei146eRF | Smoke Alarm | Hardwire / Radio Interlink |
| Ei160 Series | Mains Powered with Lithium Back Up Battery | |
| Ei164 | Heat Alarm | Hardwire Interlink |
| Ei166 | Smoke Alarm | Hardwire Interlink |
| Ei164RF | Heat Alarm | Hardwire / Radio Interlink |
| Ei166RF | Smoke Alarm | Hardwire / Radio Interlink |
| Ei3000 Series | Mains Powered with Sealed Lithium Back Up Battery | |
| Ei3014 | Heat Alarm | Hardwire Interlink |
| Ei3016 | Smoke Alarm | Hardwire Interlink |
| Ei3018 | Carbon Monoxide Alarm | Hardwire Interlink |
| Ei3024 | Smoke & Heat Alarm | Hardwire Interlink |
| Ei3028 | Heat & Carbon Monoxide Alarm | Hardwire Interlink |
| Ei3014RF | Heat Alarm | Hardwire / Radio Interlink |
| Ei3016RF | Smoke Alarm | Hardwire / Radio Interlink |
| Ei3018RF | Carbon Monoxide Alarm | Hardwire / Radio Interlink |
| Ei3024RF | Smoke & Heat Alarm | Hardwire / Radio Interlink |
| [link:listing1377]Ei3028RF[/link] | Heat & Carbon Monoxide Alarm | Hardwire / Radio Interlink |
| Ei600 Series | 10 Year Sealed Lithium Battery | |
| Ei650RF | Smoke Alarm | Radio Interlink |
| Ei630iRF | Heat Alarm | Radio Interlink |
Used as a replacement for a previous model of the alarm. Fitting instructions clear and new alarm fitted perfectly.