How it operates
A transmitter and receiver, or a transmitter-receiver unit and reflector, monitor a light beam. Smoke obscuring the beam changes the received signal and can produce an alarm.

Beam detectors monitor how smoke affects a projected light path across an open area. We assess the space, confirm the beam paths and mounting points, then handle installation, alignment and testing.
Beam detection can cover large open areas where point detectors are difficult to place, but the beam needs a stable, unobstructed path and a suitable smoke layer.
A transmitter and receiver, or a transmitter-receiver unit and reflector, monitor a light beam. Smoke obscuring the beam changes the received signal and can produce an alarm.
Often considered for warehouses, atriums, halls, hangars and other large open or high-ceiling areas where the approved design supports beam coverage.
Listed range, mounting stability, alignment, line-of-sight obstructions, ceiling geometry, stratification, airflow, sunlight or environmental effects, access and FDAS interfaces.
We review the property, required alarm sequence and existing interfaces before defining the FDAS scope and project sequence.
We review the property, current conditions, available plans and project requirements.
We define the panel, device layout, alarm sequence, interfaces and installation scope.
We discuss the proposed scope, inclusions, commercial terms and questions before approval.
Equipment, cabling, devices and site work follow the agreed project scope.
The installed system is tested and commissioned against the approved scope and sequence.
We remain available for maintenance, project records and BFP-related follow-up within our scope.
We maintain existing beam detectors according to the installed equipment, alignment method, environment, access and agreed testing scope.
Review detector status, mounting, reflector or receiver condition and visible beam path.
Check alignment, contamination, obstruction and building-movement concerns.
Perform the agreed sensitivity, fault, alarm and FDAS interface tests.
Record results, corrective needs and BFP-related follow-up connected to our scope.
Straight answers about beam paths, large spaces, alignment, obstructions, maintenance and project information.
It uses a projected light beam between a transmitter and receiver, or between a combined unit and reflector. Smoke obscuring the beam changes the received signal and can trigger the programmed alarm response.
It is often considered for warehouses, atriums, halls, hangars and other large open or high-ceiling spaces where point-detector installation or access is difficult. Final use depends on the approved design.
Yes. Beam detectors are line-of-sight devices. Racking, signs, equipment, temporary storage, doors or later construction must not block the designed beam path.
Movement can affect alignment, so mounting surfaces, expected structural movement and the detector's alignment capabilities must be reviewed during design and commissioning.
Yes. We can assess the detector and reflector or receiver, mounting, alignment, contamination, beam path, sensitivity, fault response and connection to the main FDAS.
Send the contact person, company, site location, building use, ceiling height, new or existing status, and any plans, sections, racking layout, equipment information, specifications or BFP comments available.
Send the site location, whether this is a new installation or an existing system, and any available plans or specifications. We’ll review the details and contact you about the site assessment and next steps.
Reviewed by DGRB Fire Safety Technical Team · Updated August 9, 2026 · References: BFP Revised IRR of RA 9514 and NFPA 72 — Fire Alarm and Signaling Code.