ZSHF-2 soil heat flux sensor (also known as “soil heat flux plate” and “heat flow meter”) is mainly used to measure the energy balance of soil and the heat conductivity of soil layer.
The soil heat flux sensor uses a thermopile, which is composed of two different metal materials, to measure the temperature gradient. Thermopile detectors receive thermal radiation, which can generate thermoelectric potential between nodes of two different materials.
The heat flux sensor outputs in the form of voltage, which is proportional to the heat flux. Its output voltage is a millivolt signal, which is read by the data acquisition system.