Technology & usage
Nine plain English guides covering fire alarm technology from detection devices and control panels, to hazardous area installations.
Whether you want to understand what type of detector is on your ceiling, why your system keeps generating unwanted alarms, or what the difference between a conventional and addressable panel means in practice — these guides cover the technology side of fire alarms from the ground up.
Detection
Detecting the fire
| Guide | What it covers | |
|---|---|---|
| Detection devices explained | Every detector type used in UK fire alarm systems — optical smoke, ionisation smoke, heat (fixed and rate-of-rise), multi-sensor, CO, beam, aspirating (VESDA), flame, and linear heat. For each: how it works, what it detects best, and where it should not be used.Optical · ionisation · heat · multi-sensor · VESDA · beam · linear heat | › |
| False alarm management | Why unwanted fire alarms happen, the serious consequences including Fire Service charging and delayed response policies, and the technical and procedural measures available to reduce them without compromising detection.Unwanted alarms · coincidence detection · two-stage · ARC verification · isolation | › |
Alarm devices
Warning the occupants
| Guide | What it covers | |
|---|---|---|
| Sounders, bells, and beacons | Motorised bells, electronic sounders, combined sounder beacons, and visual alarm devices (VADs). Audibility requirements under BS 5839-1, sleeping risk premises, and legal obligations for deaf and hard-of-hearing occupants under the Equality Act 2010.Sounder · VAD · beacon · 65 dB(A) · BS EN 54-23 · Equality Act | › |
Control & wiring
The panel and cabling
| Guide | What it covers | |
|---|---|---|
| Control panels explained | Conventional panels, twin-wire systems (polarity reversal, shared detection and sounder circuits), addressable panels, and suppression control panels. Practical differences in fault-finding and cause-and-effect capability, and a note on panel brand compatibility.Conventional · twin-wire · addressable · cause-and-effect · suppression panel | › |
| Cable and wiring explained | MICC (Pyro) and softskin fire-resistant cable (FP200) — construction, fire performance ratings, where each must be used, and why cable choice matters for system integrity during a fire. Covers containment, segregation, and route selection.MICC · Pyro · FP200 · PH 120 · PH 30 · LSF · containment · segregation | › |
| Wireless fire alarm systems explained | How wireless systems work, mesh networking, battery management, and supervision requirements. When wireless makes sense — listed buildings, occupied premises, difficult cable routes — and when it does not. Cost comparison with wired alternatives.Wireless · 868 MHz · mesh network · battery · listed buildings · temporary | › |
Specialist systems
Beyond the standard installation
| Guide | What it covers | |
|---|---|---|
| Suppression systems — an overview | Gaseous suppression (inert gas, FM-200, Novec 1230, CO2) and water mist systems. How each agent works, the pre-discharge sequence and safety interlocking, fire alarm integration, and F-gas and PFAS regulatory considerations. Includes water mist in heritage buildings.Inert gas · FM-200 · Novec · CO2 · water mist · pre-discharge · heritage | › |
| Signal transmission and ARCs | What an ARC is, BS 8521 transmission grades (1 through 4), IP and GSM transmission, and the PSTN switch-off and its implications for existing monitored systems. Covers costs, when monitoring is required, and what it actually provides.ARC · BS 8521 · Grade 2 · IP · GSM · PSTN switch-off · monitoring | › |
| Hazardous areas — ATEX and intrinsically safe devices | Fire alarm equipment in explosive atmospheres — zone classification (Zones 0, 1, 2 and 20, 21, 22), intrinsic safety and ATEX protection methods, equipment certification, and the CompEx competency framework including which modules are required for different scopes of work.ATEX · UKEX · Zone 1 · intrinsic safety · Ex i · CompEx · Ex01–Ex06 | › |
Something not covered here?
New guides are added regularly. If there is a technology topic you would like to see covered — or a question you cannot find an answer to anywhere — get in touch and it may well become the next guide.
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