Smoke Detector Test Tunnel，Standard Smoke & Heat Detector Test Tunnel
Application
The Smoke Fire Detector Threshold Test Chamber is suitable for:
Threshold verification of point-type smoke fire detectors.
Repeatability, orientation, and airflow testing in laboratory or production environments.
Industrial and residential smoke detector production quality control.
Specific Testing Equipment:
Point-type smoke detectors for home and industrial use
Alarm system components requiring threshold and response validation
Production testing lines for smoke detector quality assurance
Standards
The system conforms to the following national and international standards:
GB 4715-2005 – Technical Requirements and Test Methods for Point-Type Smoke Fire Detectors (China)
ISO 7240-7 – Fire Detection and Alarm Systems, Part 7: Smoke Detectors Using Scattered, Transmitted Light, or Ionization
EN 54-7 – Fire Detection and Fire Alarm Systems, Smoke Detectors
UL 268 – Standard for Smoke Detectors for Fire Protective Signaling Systems
EN54-7
EN54-29
EN14604
EN54-5
Parameters
| Unit | Specification |
|---|---|
| Temperature Range | 0–55 °C, adjustable via heating rods |
| Variable Frequency Fan | Supply voltage: 220 V; Max. static pressure: 330 Pa; Adjustable air volume: 0–275 m³/h |
| Airflow Requirement | 0.2 m/s |
| Optical Density Meter | Wavelength: 880–950 nm |
| Omega K-Type Sheathed Thermocouple | Diameter: 1.5 mm; Temperature measurement range: 0–1100 °C |
Features
Steel structure chamber with anti-rust spray finish.
Observation glass on the chamber for visual monitoring of smoke distribution.
Independent control box for flexible laboratory layout.
Fan connected with soft couplings to reduce vibration impact on test data.
Equipped with an ion concentration meter to test the response threshold of ionization detectors.
Flash device included to simulate environmental lighting conditions.
Siemens dedicated temperature module for stable and reliable temperature data acquisition.
Imported Omega thermocouple with compensation wiring reduces temperature measurement deviations.
Programmable logic controller (PLC) enables system function control, paired with dedicated data acquisition modules.
Real-time data acquisition ensures stability and reliability.
Electrical components from reputable industry brands, controlled via industrial PC with dedicated software for real-time recording, storage, and visualization of test data.
Accessories
Observation glass
Variable frequency fan assembly
Heating rod modules
Optical density meter
Ion concentration meter
Flash simulation device
Omega K-type thermocouple and compensation wiring
Siemens temperature acquisition module
PLC controller with data acquisition modules
Industrial PC and dedicated software
Test Procedures
Install the smoke fire detector into the test chamber.
Power on the chamber and set the target temperature within 0–55 °C.
Activate the variable frequency fan and adjust airflow to 0.2 m/s.
Initiate the smoke generation process and monitor optical density readings.
Conduct threshold, repeatability, orientation, and airflow tests according to GB 4715-2005 protocols.
Use ion concentration meter to verify ionization detector response, if applicable.
Apply flash simulation to assess detector response under different lighting conditions.
Record all data in real time using the industrial PC and dedicated software for analysis.
Maintenance Information
Inspect heating rods and replace if temperature control is unstable.
Regularly clean or replace optical density meters and ion concentration sensors to maintain accuracy.
Check fan soft coupling connections to prevent vibration-related errors.
Verify thermocouple calibration periodically to reduce measurement deviations.
Ensure PLC, data acquisition modules, and industrial PC function correctly; perform software updates as required.
Clean observation glass to maintain clear visibility during tests.
Conclusion
The GB 4715 Smoke Fire Detector Threshold Test Chamber offers a complete solution for laboratory and production testing of point-type smoke fire detectors. Combining precise temperature control, adjustable airflow, optical and ionization measurement, and real-time data acquisition, the system ensures accurate threshold, repeatability, and orientation testing. Its robust construction, user-friendly operation, and comprehensive functionality meet both national and international fire safety testing standards.
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