Heat Flux Meter (Thermal Flux Sensor) ISO 13943 – ASTM E1224
Category：Flammability Tester
Introduction
The Heat Flux Meter is designed to measure thermal radiation energy, expressed in kW/m², under steady-state conditions. It determines the heat flux emitted from a ceramic plate, incandescent resistor, or other heat source at a pre-determined distance. Each meter provides readings in mV, which are converted to kW/m² using calibration coefficients, allowing precise measurement of thermal radiation intensity.
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.
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