What size is a commercial smoke detector?

Commercial smoke detectors are typically disc-shaped with a diameter of approximately 125 mm (5 inches) and a thickness of approximately 25 mm (1 inch). However, the exact dimensions can vary by manufacturer and model. Some detectors, such as Kidd's traditional optical smoke detector, are 54.5 mm in diameter (including the base) x 100 mm.

Below anka security takes a closer look at the factors associated with size and location:

Shape and Size Variations:

While a 5-inch diameter and 1-inch thickness are common, some detectors are rectangular or have other unique shapes.

Mounting Type:

Commercial smoke detectors are typically mounted on the ceiling.

Press Release:

Smoke detector spacing is typically based on coverage area, with each detector generally covering a radius of 7.5 meters (24.6 feet), with overlapping circles recommended.

Standards and Regulations:

Fire alarm systems in commercial buildings are governed by standards such as BS 5839 (British Standard), which outlines requirements for planning, installation, and maintenance.

Sensor Technology:

Smoke detectors can use photoelectric or ionization sensing methods, or a combination of both, to detect smoke.

Integration with Fire Alarm Systems:

Commercial smoke detectors are often integrated into a larger fire alarm system, which may include other components such as heat detectors, manual call points, and sounders.