Heat Flux Meter (Thermal Flux Sensor) ISO 13943 / ASTM E1224
The Heat Flux Meter (Thermal Flux Sensor) is designed to accurately measure thermal radiation energy under steady-state conditions. It measures heat flux emitted from ceramic plates, incandescent resistors, and other thermal radiation sources at a defined distance, with results expressed in kW/m². The Heat Flux Meter provides output signals in mV, which are converted into thermal flux values using calibration coefficients, enabling precise evaluation of thermal radiation intensity for fire testing, material research, and industrial applications.
Applications
The Heat Flux Meter is suitable for:
(1) Measuring heat flux in fire testing laboratories for building materials, textiles, and insulation.
(2) Calibrating thermal radiation sources for experimental setups.
(3) Evaluating fire resistance and thermal performance of industrial materials.
(4) Quality control for materials requiring precise thermal flux assessment.
(5) Research in energy, aerospace, and industrial material development.
Standards
(1) UNI EN 9174: Thermal insulation – Measurement of thermal flux on samples.
(2) ISO 13943: Fire safety – Vocabulary and definitions.
(3) ASTM E1224: Standard Test Method for Heat Flux Measurement Using Heat Flux Sensors.
(4) ISO 834: Fire-resistance tests – Elements of building construction.
(5) NFPA 285: Standard Method of Fire Test for Evaluation of Fire Propagation Characteristics of Exterior Wall Assemblies.
Technical Parameters
| Parameter | Specification |
|---|---|
| Sensor body | Cylindrical, Ø50 mm (optional Ø25 mm) |
| Surface treatment | Black NEXTEL coating for sensor absorption |
| Cooling method | Circulating water cooling |
| Model HH20 | Measurement range 0–5/10 Ws/cm² |
| Model HH21 | Measurement range 0–1.5/5 Ws/cm² |
| Model HH22 | Measurement range 0–5/10 Ws/cm² |
| Accuracy | ±3% |
| Precision | ±1% |
| Output | mV (connects to recorder or measurement unit) |
| Accessories | Optional calcium silicate stand for positioning per UNI EN 9174 |
| Included | Protective box and calibration certificate |
Advantages
(1) High-precision measurement with ±1% repeatability.
(2) Water-cooled design ensures stable thermal readings.
(3) NEXTEL black coating maximizes sensor absorption and accuracy.
(4) Modular design allows for use with different thermal sources and test distances.
(5) Compatible with recorders and automated data acquisition systems.
(6) Optional mounting stand ensures standard-compliant sample positioning.
FAQ
(1) What is this product?
A heat flux meter for measuring thermal radiation intensity in kW/m² under steady-state conditions.
(2) What is it used for?
Measures thermal radiation from heat sources for fire testing, material evaluation, and research purposes.
(3) What types of this product exist?
Models HH20, HH21, HH22 with different measurement ranges and cylindrical body diameters.
(4) What industry problems can it solve?
Provides accurate thermal flux data for fire safety testing, material characterization, and quality control.
(5) How is it operated?
Positioned at a defined distance from a heat source; the sensor outputs mV signals, which are converted to kW/m² using calibration coefficients, recorded manually or via a connected data acquisition system.
(6)Why does the Heat Flux Meter use water cooling?
The Heat Flux Meter adopts a circulating water cooling design to maintain stable sensor operation under thermal radiation exposure. Effective cooling reduces temperature influence on the sensor and improves measurement stability, allowing users to obtain reliable thermal flux data during continuous testing conditions.
(7)How does the Heat Flux Meter provide measurement results?
The Heat Flux Meter outputs measurement signals in mV, which are converted into heat flux values using calibration coefficients. The signal can be connected to recorders or automated data acquisition systems, allowing users to record, analyze, and manage thermal radiation measurement data efficiently.
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