FHF02 is Hukseflux's standard model for general-purpose heat flux measurement. FHF02 is very versatile: it has an integrated temperature sensor and thermal spreaders to reduce thermal conductivity dependence. It is applicable over a temperature range from –40 to +150°C. FHF02 measures heat flux from conduction, radiation and convection.
FHF02 is a sensor for general-purpose heat flux measurement. It is thin and versatile. FHF02 measures heat flux through the object in which it is incorporated or on which it is mounted, in W/m². The sensor in FHF02 is a thermopile. This thermopile measures the temperature difference across the flexible body of FHF02. A type T thermocouple is integrated as well. The thermopile and thermocouple are passive sensors; they do not require power.
A thermal spreader, which is a conductive layer covering the sensor, helps reduce the thermal conductivity dependence of the measurement. With its incorporated spreaders, the sensitivity of FHF02 is independent of its environment. Many competing sensors do not have thermal spreaders. The passive guard area around the sensor reduces edge effects and is used for mounting.
Using FHF02 is easy. It can be connected directly to commonly used data logging systems. The heat flux in W/m² is calculated by dividing the FHF02 output, a small voltage, by the sensitivity. The sensitivity is provided with FHF02 on its product certificate.
|Measurand:||heat flux temperature|
|Measurement range:||(-10 to +10) x10³ W/m²|
|Sensitivity (nominal):||5.5 x10⁻⁶ V/(W/m²)|
|Temperature sensor:||type T thermocouple|
|Rated bending radius:||≥ 50 x10⁻³ m (repeated bending not recommended)|
|Rated load on a single wire:||≤ 1.6 kg|
|Sensing area||9 x10⁻⁴ m²|
|Sensor thermal resistance:||30 x10⁻⁴ K/(W/m²)|
|Sensor resistance range:||50 to 100 Ω|
|Sensor thickness:||0.9 x10⁻³ m|
|Uncertainty of calibration:||±5% (k = 2)|
|Operating temperature range:||-40 to +150°C|
|IP protection class:||IP67|
|Standard wire length:||2 m|