Heat Flux Sensor Measurement
Heat Flux Sensor Technology

An introduction to heat flux sensor measurement

This short review about heat flux sensor measurement aims to give the reader the sufficient knowledge to implement and perform heat flux measurements to obtain optimum processing or experimental conditions.

Short reminder about heat flux and heat flux sensors

Heat Flux is the rate of heat energy that passes through a surface. Depending on the exact definition of heat flux, its unit can be expressed as either W/m2 or W. Temperature gradient in a given environment results in the creation of a heat flux. The Heat flux flows from the hot to the cold side of the given system. Heat Flux is dependent on the temperature gradient and on the thermal transfer coefficient of the given system. Heat flux can be estimated with two different methods:

  • Directly with Heat Flux Sensors
  • Indirectly using Temperature Sensors.

A heat flux sensor is a Seebeck sensor: When heat passes through the sensor, the sensor generates a voltage signal. This voltage signal is proportional to the heat passing through the sensor. Thus, they can be used for many industrial or research applications implying a temperature gradient throughout a surface.

How to perform heat flux sensor measurement?

About the importance of heat flux measurements

Understanding the thermal environment is of great importance for many applications.

As an example, greenTEG’s heat flux sensors for R&D applications allow the operator to understand effectively the thermal influences affecting an experimental setup (e.g. heat deforming sample holders), or reviewing the thermal output of industrial processes (e.g. heat output from a chemical reaction).

Although in many applications temperature sensors are sufficient in establishing an accurate understanding of the thermal environment, in some cases a deeper insight into the thermal processes is required. Heat flux measurements can provide the required high-resolution data.

Heat flux measurement with greenTEG’s heat flux sensors


  • Miniature & Compact
  • High sensitivity
  • Facilitated integration
  • Precise measurement of heat flux going into and out of the setup.
  • Quick response time (< 1s)
  • Enhanced monitoring of thermal processes in applications.
  • Accurate heat transfer coefficients evaluation.