B

Backplate

An accessory which provides a high degree of protection against the ingress of water or dust into the back of the detector. 

Backward Compatibility

A term used to describe equipment that is compatible with older products. See also 'forward compatibility'.

Base

Apparatus upon which the fire detector is mounted.
To find out more about Apollo bases, visit the Bases page.

BASEEFA

British Approvals Service for Electronic Equipment in Flammable Atmospheres. This is the approval body, under the HSE, for products designed for use in hazardous areas. See also ATEX.

Beacon

A device used to produce a visible indication of an alarm.
To find out more about Apollo bases, visit the Beacon page.

Beam Detector

A device incorporating a transmitter (which projects a beam of infra-red light), receiver (which registers the light and produces an electrical signal) and an interface (which processes the signal and generates alarm or fault signals).
Beam detectors are designed to protect large, open spaces.

To find out more about, visit the Beam Detector page.