HFS Heat Flux Sensor Instruction Manual
8
2.
Next, calculate heat flux using the adjusted sensitivity and voltage
measurement across the heat flux wire leads.
It should be noted that both positive and negative voltages can be measured by the HFS
sensor. A negative voltage value compared to a positive voltage just means that the heat
flux is moving in the opposite direction.
Heat Flux Sensor Sensitivity Determination
The sensor sensitivity is the output voltage induced by the sensor divided by the
heat flux conducted through the sensor.
Using a custom-made calibration apparatus, Heat flux can be calculated using the
measured temperature differential and a Standard Reference material
’s known thermal
resistance.
T
he sensor’s sensitivity can be determined by dividing the output voltage from the sensor
by the heat flux.
The sensitivity can then be adjusted according to the temperature accordingly.
Where T
°C
is the sensor’s temperature in degrees Celsius & S
Calib
is the calibrated sensor
sensitivity provided in the table above.
