ISO 7240-5:2018

Overview

ISO 7240-5:2018 - "Fire detection and fire alarm systems - Part 5: Point type heat detectors" specifies requirements, test methods and performance criteria for point-type heat detectors used in building fire detection and fire alarm systems. It applies primarily to conventional point heat detectors installed in buildings (see ISO 7240‑1 for system-level requirements). The standard is a technical reference for manufacturers, test houses, installers and fire safety professionals responsible for design, verification and certification of heat detectors.

Key technical topics and requirements

• Scope and classification: Defines detector classes and their intended application within building fire alarm systems.
• General requirements: Covers positioning of heat sensitive elements, individual alarm indication, connection/monitoring of ancillary devices and detachable detectors, plus manufacturer and on‑site adjustment of detector response.
• Software-controlled detectors: Requirements for software design, program/data storage and related integrity controls for detectors that use firmware or software logic.
• Comprehensive test program: Detailed test types and procedures to verify performance and robustness under realistic conditions. Representative tests include:
  • Directional dependence and static response temperature
  • Response time measurements (from typical application temperature, from 25 °C, and from high ambient temperatures)
  • Variation in supply parameters and reproducibility
  • Environmental endurance: cold, dry heat, damp heat (cyclic and steady-state), sulphur dioxide corrosion
  • Mechanical robustness: shock, impact, vibration (operational and endurance)
  • Electromagnetic compatibility (EMC) immunity tests
  • Suffix-specific tests (e.g., additional tests for detec­tors with specific suffixes such as S or R)
• Test conditions and tolerances: Defines atmospheric and mounting conditions, measurement methods and acceptance criteria for repeatable laboratory testing.

Practical applications and users

ISO 7240-5:2018 is used by:

• Detector manufacturers for product design, quality control and type‑testing before market release.
• Test laboratories and certification bodies to perform standardized performance and endurance testing.
• Fire safety engineers and system designers to select appropriate heat detectors for specific building types, ambient conditions and risk scenarios.
• Installers, facility managers and building owners to ensure installed detectors meet recognized performance standards for reliability and environmental resistance.

Adoption improves detector reliability, interoperability and compliance with fire safety regulations, and supports procurement and specification processes.

Related standards

• ISO 7240‑1 - Fire detection and fire alarm systems: system principles and general requirements (referenced by ISO 7240-5).
• Other parts of the ISO 7240 series cover detectors, alarm devices and system interfaces; consult the series for complementary requirements and system-level guidance.

Keywords: ISO 7240-5:2018, point type heat detectors, fire detection and fire alarm systems, detector testing, performance criteria, EMC immunity, environmental testing, fire safety standards.