How to Determine the Right Fire Detection Solution for Factories?
How to choose the right fire detection system in factories? We compare the operating principles, advantages, and technical limitations of optical smoke, heat, flame, beam, and aspirating smoke detectors. We examine the fundamental principles of selecting the correct technology based on criteria such as production environment, ceiling height, dust, airflow, and fire risk.
The selection of a fire detection system in factories cannot be based solely on the size of the facility or the number of detectors to be installed. Production processes, raw materials used, fire load, ceiling height, and environmental conditions directly influence which detection technology will be suitable.
While early smoke detection may be a priority in an electrical room, detecting rapidly developing flaming fires may become crucial in a production area containing flammable liquids. In factories with high dust levels, standard optical smoke detectors can lead to nuisance alarms.
Therefore, the fundamental question in determining the correct system is not which detector is better, but which fire risk can be reliably detected with which technology.
First Step in Fire Detection System Selection: Risk Identification
In industrial fire detection projects, the fire risk and operating conditions of the protected area must be evaluated before selecting detectors.
This evaluation seeks answers to three fundamental questions:
What type of fire is expected? A slow-developing, smoke-producing fire, or a fast-developing flaming fire?
Under what conditions will the fire be detected? Are there dust, vapor, strong air currents, high temperatures, or physical obstructions in the environment?
What is the expected performance from the detection system? Is early warning, equipment protection, safe evacuation, or control of a specific production process the priority?
The answers to these questions determine not only the detector technology but also device placement, detection coverage, and alarm scenarios.
For broader information on managing fire risks, suppression systems, and evacuation processes in factories, GüvenlikOnline's technical article titled The Most Effective Way to Improve Fire Safety in Industrial Facilities can be reviewed.
Fire Detection Technologies Used in Factories
The most frequently evaluated technologies in industrial facilities include optical smoke, heat, beam type smoke, aspirating smoke, flame, and linear heat detection systems.
Each technology has a different detection principle. This difference determines in which fire scenarios they can be used and by which environmental conditions they may be affected.
1. Optical Smoke Detectors
Optical smoke detectors operate on the principle of smoke particles in the air scattering light or affecting light transmission.
They can be considered in areas where early-stage smoke development needs to be detected and environmental contamination is limited.
Suitable areas: Offices, technical rooms, electrical rooms, and clean production sections.
Advantages:
Can provide early smoke detection in appropriate fire scenarios.
Suitable for monitoring specific areas due to point detection.
When used with addressable systems, alarm and fault monitoring can be done on a per-device basis.
Technical limitations:
Heavy dust, water vapor, and production aerosols can cause unwanted alarms. High air velocities and unsuitable mounting positions can affect smoke reaching the detection chamber.
Therefore, the selection of an optical smoke detector should not be based solely on its sensitivity value.
2. Heat Detectors
Heat detectors generate a fire alarm by monitoring the exceeding of specific temperature levels or the temperature increase characteristic.
They can be used in some dirty, dusty, or steamy production environments where smoke detection is not suitable.
Suitable areas: Some mechanical production areas, steam process sections, and locations where smoke detection is difficult due to environmental conditions.
Advantages:
Less affected by some false alarm sources that may arise from smoke and aerosols.
Can provide reliable detection in certain industrial conditions when the appropriate temperature class is selected.
Technical limitations:
Since they require the fire to generate a sufficient amount of heat, they may provide a later warning compared to smoke detection in some fire scenarios.
Fixed temperature and rate-of-rise based detection methods are different. The detector's temperature class should be evaluated together with the factory's normal operating temperature and potential temperature changes.
3. Beam Type Smoke Detectors
Beam detectors detect smoke by analyzing the attenuation in the optical beam path between a light source and a receiver or reflector.
They are among the technologies that can be used in large open-plan areas with high ceilings.
Suitable areas: Large production halls, high-ceiling warehouses, and industrial structures with wide spans.
Advantages:
Allows monitoring of large areas under appropriate geometric conditions.
Can be an alternative to point detectors in some high-ceiling areas.
Technical limitations:
Cranes, moving machinery, high shelving, and structural vibrations can affect the beam path. Additionally, smoke reaching ceiling level may be delayed due to temperature stratification and air currents.
When selecting a beam detector, mounting height, alignment stability, line of sight, and maintenance access should be evaluated as much as the beam distance.
4. Aspirating Smoke Detection Systems (ASD)
Aspirating systems draw air from the protected environment through a pipe network and perform smoke analysis in a central detection unit.
This technology can provide advantages, especially in critical areas requiring early warning or in applications where access to point detectors is difficult.
Suitable areas: Electrical and control rooms, critical automation infrastructures, some high-ceiling facilities, and specially designed industrial areas.
Advantages:
Can offer high-sensitivity smoke detection in suitable systems.
The detection unit can be placed at an accessible point for maintenance.
Sampling points can be designed according to the characteristics of the protected area.
Technical limitations:
The length of air sampling pipes, hole placement, air transport time, filtration, and airflow monitoring affect system performance.
In heavily dusty environments, filter clogging, pipe blockages, and maintenance frequency should also be considered.
When selecting ASD systems, in addition to EN 54-20 compliance, the detection class supported by the manufacturer, pipe network calculations, and project conditions should be checked.
5. Flame Detectors
Flame detectors operate by sensing specific ultraviolet (UV) or infrared (IR) radiation characteristics emitted by a flame.
They can be considered especially in process areas where there is a risk of rapidly developing flaming fires.
Suitable areas: Production sections using flammable liquids, certain chemical processes, and risky areas where a clear line of sight can be maintained.
Advantages:
Can provide direct detection of flame in appropriate fire types.
Has a different detection principle from technologies that wait for smoke to reach the detector level.
Technical limitations:
Machinery, equipment, and structural obstructions in the line of sight can limit the detection area.
Welding operations, hot equipment, and certain radiation sources should also be evaluated for false alarms.
UV, IR, and multi-spectrum flame detectors do not have the same detection performance. During selection, the expected fuel type, viewing angle, environmental conditions, and manufacturer's test data should be examined together.
6. Linear Heat Detection Systems
Linear heat detection systems monitor temperature changes via sensor cables, fiber optics, or similar sensing elements.
Suitable areas: Cable galleries, conveyor systems, some equipment protection applications, and areas where point detector installation is difficult.
Advantages:
A continuous detection line can be created along long or narrow routes.
Depending on the technology, it may be possible to associate temperature changes with a specific area or location.
Technical limitations:
The detection principle varies depending on the technology used. Resettable and non-resettable systems do not have the same characteristics.
The EN 54-22 standard covers resettable linear heat detectors. Therefore, it should not be assumed that every linear heat detection product can be evaluated under the same standard.
Fire Detection Technologies Comparison Table
For the selection of the correct technology, the detection method, potential application areas, and limitations should be evaluated together.
Technology | Prominent use | Critical selection criterion |
|---|---|---|
Optical smoke | Clean environments, technical rooms | Smoke generation, dust and vapor |
Heat | Some dirty and steamy environments | Temperature class, fire development rate |
Beam smoke | Large and high-ceiling areas | Beam path, alignment, smoke stratification |
ASD | Critical areas requiring early warning | Sensitivity class, sample transport time, filtration |
UV/IR flame | Flammable liquid and rapid flaming fire risks | Fuel type, viewing angle, false alarm sources |
Linear heat | Cable galleries and conveyor lines | Sensing element, temperature range, positioning |
The application areas in the table are examples. There is no absolute superiority ranking among technologies; the final selection should be based on the facility's risk assessment, relevant standards, and verified product performance.
How Do a Factory's Physical Conditions Affect Detector Selection?
Ceiling height and smoke stratification
In high-ceiling industrial structures, smoke reaching the ceiling and being detected by the detector depends on the fire's heat output and environmental conditions.
As ceiling height increases, detector placement, detection distances, and smoke movement must be examined more carefully.
Selecting a beam or aspirating system based solely on ceiling height is incorrect. Applicable design guidelines and necessary engineering calculations should be used as a basis.
Dust, vapor, and production aerosols
In industrial facilities, the particles detectors are exposed to are not solely composed of actual fire smoke.
Dust, water vapor, or other aerosols generated during production can affect some smoke detection methods.
When making a selection in such areas, the detector's resistance to contamination, environmental suitability, maintenance requirements, and false alarm behavior should be examined together.
Ventilation and air currents
Industrial ventilation systems can alter smoke movement and the time it takes to reach the detector.
Especially in areas with strong air currents, not only the detector placement plan but also normal and fire-time ventilation behaviors should be evaluated.
Explosive atmospheres
In areas where an explosive atmosphere can form due to flammable gases, vapors, or dust, the detector's detection performance alone is not sufficient.
The suitability of the equipment to be used for the relevant hazardous area classification and the necessary Ex/ATEX protection features must also be verified.
EN 54 compliance alone does not mean that a detector can be used in an explosive atmosphere.
How to Compare Addressable and Conventional Fire Detection Systems?
In factories, system architecture is as important as detector technology.
In conventional systems, the location of events is generally determined at the zone level, while addressable systems allow individual monitoring of supported devices.
Criterion | Conventional system | Addressable system |
|---|---|---|
Determination of alarm location | Zone-based | Device-based |
Monitoring of device status | More limited | More detailed, depending on device capabilities |
Multi-zone facility management | May require more zoning planning | Can provide advantages in terms of central monitoring |
Expansion possibilities | Depends on panel and circuit capacity | Depends on panel, loop, and protocol capacity |
System complexity | Generally simpler | Configuration and compatibility management can be more comprehensive |
In large facilities with multiple production halls, warehouses, and technical volumes, addressable systems may offer operational advantages.
However, using an addressable system does not correct the detection performance of a wrongly selected detector.
Panel architecture and detector selection should be considered as separate but compatible engineering decisions.
For a comparison of fire alarm panels and related hardware, the GüvenlikOnline Fire Alarm Systems Catalog can be reviewed.
Which Technical Parameters Should Be Examined When Selecting a Fire Detection System?
It is not enough to look only at the detection distance or sensitivity information on a product's technical data sheet.
The following parameters, in particular, should be evaluated:
Detection principle: What fire indicators does the detector sense?
Detection performance: Under what test and usage conditions is the manufacturer's stated performance valid?
Environmental durability: Are the operating temperature, humidity, dust, and protection class suitable for the project?
Mounting criteria: What are the limitations for ceiling, wall, line of sight, airflow, and physical obstructions?
Nuisance alarm behavior: How might normal production processes affect the detector?
System compatibility: Are the detector, panel, interface modules, and related components verified to work together?
Maintenance requirements: How will access, testing, cleaning, calibration, or replacement of the detector be performed?
Standard compliance: Are the relevant EN 54 standard, conformity documents, and, if applicable, explosive atmosphere requirements met?
These criteria should be defined especially in procurement specifications. Two products using the same technology may have different environmental characteristics or supported applications.
Why Are EN 54 Standards Important in Fire Detection Systems?
In Turkey, one of the main legal bases for the design of fire detection and alarm systems is the Regulation on Fire Protection of Buildings.
Article 74 of the Regulation governs the EN 54 compliance of fire detection systems and components. Other relevant articles address detection and alarm requirements, emergency control functions, and maintenance responsibilities.
The main EN 54 sections used in the technical evaluation of fire detection equipment are:
Standard | Scope |
|---|---|
EN 54-2 | Fire alarm control and indicating equipment |
EN 54-4 | Power supply equipment |
EN 54-5 | Point heat detectors |
EN 54-7 | Point smoke detectors |
EN 54-10 | Flame detectors |
EN 54-12 | Optical beam smoke detectors |
EN 54-20 | Aspirating smoke detectors |
EN 54-22 | Resettable linear heat detectors |
CEN/TS 54-14, on the other hand, serves as a guide for the planning, design, installation, commissioning, use, and maintenance of fire detection and alarm systems.
The new 2026 version of this document is listed in the records of national standards bodies in Europe. In applications in Turkey, the current version accepted by TSE and relevant national regulations should be taken as a basis.
Product standard compliance and correct system design are different requirements. The existence of a conformity certificate for a detector does not mean that the device can be used in every part of the factory.
Can Artificial Intelligence and Thermal Cameras Be Alternatives to Detectors?
Image-based smoke and flame detection systems and thermal cameras can be considered as supplementary or special-purpose detection solutions in certain industrial applications.
Thermal camera systems can help monitor unusual surface temperatures in some machinery and electrical equipment. Image analysis can be used to detect signs of smoke or flame under suitable viewing conditions.
However, the fact that a camera has image analytics capabilities does not automatically mean it is a legally compliant fire detection device.
There is an ISO/TS 7240-30:2022 standard that addresses the design and application of video-based fire detection systems.
Therefore, if camera-based solutions are considered for use in place of mandatory fire detection systems, the product's suitability, project requirements, and relevant legislation must be verified separately.
What Should Be Considered During the Installation and Commissioning Process?
Even if the appropriate technology has been selected, faulty installation and inadequate commissioning can negatively affect detection reliability.
After installation, the following checks should be performed:
Conformity of detector locations to the approved project.
Accuracy of detection zone and address information.
Correct monitoring of alarm and fault signals.
Power outage and backup power scenarios.
Functional testing of detectors using appropriate test methods.
Verification of systems connected to the fire alarm panel via a cause-and-effect matrix.
Creation of records related to maintenance and periodic tests.
Changes to production lines, shelving arrangements, or ventilation systems may require a re-evaluation of the existing detection design.
Technical Checklist for Fire Detection System Selection
Factory managers and project teams should answer the following questions before procurement or project design:
- Has the fire risk of each production section been evaluated separately?
- Have expected fire development scenarios been determined?
- Have dust, vapor, temperature, and airflow conditions been examined?
- Have detector technologies been compared with their technical limitations?
- Have ceiling height and physical obstructions been included in the project?
- Have relevant standards and product conformity documents been checked?
- Have system architecture, capacity, and integration requirements been determined?
- Have testing, commissioning, and periodic maintenance processes been planned?
The answers to these questions help avoid unnecessary equipment selection and ensure a more reliable evaluation of the fire detection project.
Frequently Asked Questions
What is the best fire detector for factories?
There is no single best detector that will perform optimally in every factory. The appropriate choice is made based on the type of flammable material, fire development scenario, environmental conditions, and detection objectives.
Is it mandatory to use beam detectors in high-ceiling factories?
No. Beam detectors are one of the technologies that can be considered in high-ceiling areas. Aspirating or other suitable detection methods can also be examined according to project conditions.
Can smoke detectors be used in dusty factories?
Usability depends on the characteristics of the dust and the detector technology. Standard optical smoke detectors may cause nuisance alarms in some dusty areas. Special detection and filtration solutions or different technologies can be considered.
Is an addressable fire detection system necessary?
The system architecture should be chosen based on the facility's size, function, fire scenarios, and regulatory requirements. Addressable systems can provide the advantage of device-based monitoring, especially in large and multi-zone facilities.
Can AI-powered cameras replace fire detectors?
Not every image analysis system can be used for this purpose. The suitability of video-based fire detection solutions must be evaluated separately in accordance with relevant standards and project requirements.
Conclusion: The Right Technology Must Be Chosen for the Right Risk
Effective fire detection in factories is not a selection based on a single detector technology or device count.
Optical smoke, heat, flame, beam, aspirating smoke, and linear heat detection technologies each have advantages and limitations under different application conditions.
The foundation of a successful system lies in correctly identifying the fire risk, selecting the appropriate technology, designing in accordance with standards, and verified field performance.
When evaluating fire detection systems, the goal is not merely to provide early warning; it is to create an infrastructure that can reliably detect actual fire indicators, limit nuisance alarms, and is compatible with the facility's security requirements.
Those wishing to examine different detection devices can evaluate product groups via the GüvenlikOnline Fire Detectors Catalog.
References
T.C. Ministry of Justice — Regulation on Fire Protection of Buildings. Fire detection, alarm, emergency control, and maintenance provisions.
Fire Industry Association — How to Select the Right Detector for the Job. Fire risk, detector selection, and false alarm sources.
EVS — EN 54-5:2017+A1:2018. Point heat detectors.
EVS — EN 54-7:2018. Point smoke detectors.
EVS — EN 54-10:2002. Flame detectors; should be evaluated with relevant amendments.
EVS — EN 54-12:2015. Optical beam smoke detectors.
EVS — EN 54-20:2006. Aspirating smoke detectors; should be evaluated with AC:2008 correction.
EVS — EN 54-22:2015+A1:2020. Resettable linear heat detectors.
IPQ — CEN/TS 54-14:2026. National standard registration for the 2026 version of the guide for design, installation, and maintenance of fire detection systems.
ISO — ISO/TS 7240-30:2022. Design, installation, and commissioning of video-based fire detection systems.
European Commission — ATEX. Conformity requirements for equipment used in potentially explosive atmospheres.