The Aico Ei146e Optical Smoke Alarm (SKU: Ei146e) is a mains-powered smoke alarm designed for fast, reliable detection of slow, smouldering fires often caused by electrical faults or upholstered furniture. Featuring a large optical sensor chamber, automatic dust compensation, and a 9V alkaline battery backup, this alarm is ideal for hallways, landings, bedrooms, living rooms, and dining areas.

Part of the trusted Aico 140e Series, the Ei146e includes an easi-fit base for fast installation and is compatible with hardwired or RadioLINK wireless interconnection, offering flexible, scalable fire safety for residential properties. It is Grade D2, Kitemarked to BS EN 14604:2005, and fully compliant with Scottish fire safety legislation.

Key Features:

• Brand: Aico

• Model SKU: Ei146e

• Sensor Type: Optical (photoelectric chamber) – ideal for smouldering fires

• Power Source: 230V AC mains powered

• Battery Backup: Replaceable 9V alkaline battery

• Installation: Supplied with easi-fit base for quick, secure mounting

• Interconnection: Supports both hardwired and RadioLINK (wireless) setups

• Sound Level: 85dB(A) at 3 metres

• Certifications:

  • Kitemarked to BS EN 14604:2005

  • Grade D2 – meets UK housing regulations

  • 5-year manufacturer guarantee

• Indicators:

  • Green = Power

  • Red = Alarm or fault

• Self-Test: Chamber tested every 40 seconds; audible beep alerts on degradation

• Insect Screen: Prevents false alarms due to debris (1.00mm mesh)

• Operating Conditions:

  • Temp: -10°C to +40°C

  • Humidity: 15%–95% RH

• Dimensions:

  • Product: 148mm x 50mm

  • Boxed: 155mm x 155mm x 62mm

• Weight: 345g (product), 389g (boxed)

Fast Response to Smouldering Fires

The Ei146e is equipped with a highly sensitive optical sensor designed to detect smoke particles from slow-developing fires—such as those caused by overheated electrical appliances, faulty wiring, or smouldering upholstery. This type of fire is common in bedrooms, lounges, and dining rooms, making the Ei146e perfectly suited for these areas.

By installing the Ei146e in hallways and landings, you're also ensuring early detection along escape routes, a key element of household fire safety plans.

Flexible Installation with Easi-fit Base

The included easi-fit base simplifies installation, making it ideal for electricians and maintenance teams working on multi-property portfolios or renovations. The alarm simply twists onto the base, reducing installation time and ensuring a secure fit.

Hardwired or Wireless Interconnection

The Ei146e can be interconnected with up to 12 compatible Aico alarms and accessories using either:

• Hardwired interconnection – for traditional installations, or

• RadioLINK (wireless) interconnection – for easier retrofits with no rewiring

When interconnected, if one alarm triggers, all alarms in the network sound simultaneously, alerting occupants throughout the home.

Example Use Case: Whole-Home Safety in a Family Property

In a two-storey home, Ei146e alarms are installed in the hallway, landing, and living room. When a faulty phone charger overheats in the lounge and begins to smoulder, the Ei146e’s optical sensor quickly detects the smoke particles. The alarm activates and, thanks to RadioLINK+ wireless interconnection, other alarms upstairs sound at the same time—alerting everyone in the house.

The 9V battery backup ensures continued operation during a power outage, and the automatic dust compensation system minimises nuisance alarms, especially in older properties where airborne particles may be more common.

The Aico Ei146e Optical Smoke Alarm (SKU: Ei146e) offers a professional-grade fire safety solution with reliable detection, quick installation, and flexible system integration. Whether for new builds, retrofits, or upgrades to meet modern safety standards, this alarm delivers trusted performance with Aico's hallmark quality.