Conventional Smoke Detector - Fire Alarm Detector

A conventional smoke detector is the most common detector used in zone-based fire alarm systems. It connects to a conventional fire alarm panel on a 2-wire zone circuit, and when it senses smoke, it changes its current draw so the panel raises a fire alarm for that zone. Most conventional smoke detectors use an optical, or photoelectric, sensor that reacts well to the smouldering smoke from cables, paper and furniture, so check your model for its sensing type. The detector clips into a base, so you can fit the base first, wire it, and add the detector later. An LED on the detector shows when it is in alarm. A standard detector covers a limited area, so the number and spacing depend on the ceiling height and the room, and typical coverage is about 60 to 80 square metres per detector. Because the panel only knows the zone, not the single detector, this system suits small and medium buildings.

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Conventional Smoke Detector - Key Features

• Early smoke detection for rooms, corridors and stores
• 2-wire zone connection: simple wiring to a conventional panel
• Plug-in base: easy to install and to remove for cleaning
• Alarm LED to see which detector triggered
• Works with conventional panels from many brands

Conventional Smoke Detector - Technical Specifications

• Type: Conventional spot smoke detector
• Sensing: usually optical (photoelectric). Check your model
• Wiring: 2-wire zone circuit
• Supply: from the panel zone, usually 12V or 24V DC
• Indicator: alarm LED
• Typical coverage: about 60 to 80 square metres, depending on the standard and the ceiling height
• Standards: check the label for the approval on your model (for example EN 54-7 or UL 268)

Who Should Buy This Detector?

• Offices, schools and clinics
• Hotels, hostels and apartment buildings
• Shops, plazas and showrooms
• Warehouses with clean air
• Any site with a conventional fire alarm panel

Conventional or Addressable?

In a conventional system, the panel shows the zone where a fire was detected, such as “Zone 3, Second Floor”. In an addressable system, the panel shows the exact detector. Conventional systems cost less, and they are a good fit for small and medium buildings. If you need to find the exact device fast in a large building, an addressable system is a better choice.

Installation and Usage Guide of Conventional Smoke Detector

• Use a detector and a base that are made for your panel
• Fit the base on the ceiling, away from air vents and kitchens
• Keep it clear of steam, dust and cooking fumes, which can cause false alarms
• Connect the zone wires to the base terminals and fit an end-of-line device as your panel requires
• Test each detector after installation and once a year, as your local rules advise
• Installation should be done by a qualified fire alarm installer

Frequently Asked Questions

What does conventional mean?
The detectors are wired on zone circuits, and the panel shows the zone, not the single detector.

How many detectors can I fit on one zone?
It depends on your panel. Check the panel manual.

Can I use any detector with any panel?
Use a detector listed for your panel for the best results.

What causes false alarms?
Steam, dust, cooking fumes and insects.

Do I need a base?
Yes. The detector clips into a base.

How often should I test it?
At least once a year, or as your local rules require.

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