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Technical Description

Soil heat flux sensor uses thermopile to measure soil heat flux, which is mainly used to measure soil energy balance and soil layer thermal conductivity.Soil heat flux sensor, also known as heat flow plate, soil heat flux plate, heat flow meter and other names, is an instrument used to measure heat flux and can be used for internal measurements of soil.It outputs in the form of voltage through a thermopile, and the voltage is proportional to the heat flux.It is easy to operate and is especially suitable for measuring the thermal conductivity of soil, building walls, and glass walls.The soil heat flux value is measured using a heat flux plate buried 2cm in the soil.Throughout the year, it changes with the seasons.In summer, the soil heat flux is positive, and heat enters the soil layer, and the amount is larger; in winter, the soil heat flux is negative, and the amount of heat in the soil is negative.Heat is released to the atmosphere, but in a smaller amount.

Measurement Method

                 Measurement methods in soil                                                                            Wall measurement method

Features

●  Small size, fast and accurate measurement

●  Low power consumption design, adopting reasonable power consumption control mode

●  Stable performance

●  Soil heat flux sensor measurement method

• How does the heat flux sensor convert measurements?

  • It outputs ​voltage signals via embedded thermopiles, where voltage is ​directly proportional​ to heat flux. ▸ Simple analog integration for energy balance studies

• Why does buried depth matter for seasonal measurements?

  • At ​2cm burial depth: ☀️ Summer → ​Positive flux​ (heat absorbed into soil) ❄️ Winter → ​Negative flux​ (heat released to atmosphere) → Reflects annual soil-atmosphere energy exchange