Patient Monitoring
core body temperature for industry

Core Body Temperature for Patient Monitoring

This short note describes the use of core body temperature sensor for patient monitoring and presents the various sensing solutions adapted to the application of remote patient monitoring.

About the use of Core Body Temperature for Patient Monitoring

What is Core Body Temperature?

patient monitoring

Core body temperature is one of the four primary vital signs of our body. Core body temperature refers to the temperature of the body’s organs. It fluctuates following physiological processes, such as circadian cycles, menstruation, illness or physical activity.

Therefore, it can allow to gain more insight about the internal or external parameters affecting those natural mechanisms. Many devices on the market attempt to estimate core body temperature via skin surface temperature.

Due to the complexity of thermal regulation and environmental conditions, this estimate does not come close to the accuracy and reliability of greenTEG’s Core Body Temperature Sensor.

How Core Body Temperature Sensor can be used for Patient Monitoring?

In this case study, we present an unique solution to accurately measure core body temperature on the wrist during low to moderate physical activity like sleep and daily life (free-living study). The measurements were conducted with greenTEG’s Core Body Temperature monitor.

The study consists of 7 measurements on healthy subjects aged 25 to 45 years. Each measurement lasted between 16 to 24 hours.

The reference core body temperature signal was obtained using an ingestible radio pill thermometer (e-Celsius capsule).

The signal of the heat flux sensor was combined with several other parameters to compensate for physiological thermoregulation, resulting in an accuracy of 0.3 °C (mean deviation) with respect to the reference signal (ingestible radio pill thermometer).

patient monitoring

The algorithm can easily be implemented into any microcontroller. The full case study is available here upon request.

patient monitoring
The graph above shows the comparison between references core body temperature (blue line, measured with an ingested radio pill) with heat flux based core body temperature measured on the skin (green line).

core body temperature

Do you want to know more about how to perform Patient Monitoring with our sensor ?

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This short video relates well the advantages of Core Body Temperature monitoring for Individual Health Monitoring including Sleep or Circadian Cycle Tracking:

N.B. Due to copyright reasons, this video is available only in Switzerland. Contact us for more information.

Core Body Temperature Monitoring for Health & Wellness by greenTEG & Schweizer Radio und Fernsehen

Why choosing Core Body Temperature Sensor for Patient Monitoring?

greenTEG offers the world’s first core body temperature sensor for continuous and non-invasive measurements. The combination of our miniaturized sensor and AI-based algorithms are the backbone of our technology. This technology currently supports three sensing solutions based on your application needs. The wearable core body temperature sensing solutions are described in details here.

core body temperature for industry


  • Integration solution into any wearable in contact with skin. Chest-worn or wrist-worn.
  • Accurate algorithm to determine core body temperature.
  • SMD mountable 2mm x 2mm XU sensor.

The CALERA® technology has been developed and validated by more than 10 clinical trials showing for all position, clinical-grade accuracy.

OEM integration Wearables

In addition, a comparison of tympanic with core body temperature in stroke patients was performed by Ajčević et al. (2022) and reported in the Sensors journal. This work highlights the potential of core body temperature monitoring performed with greenTEG’s technology as a method to track reliably stroke patients body temperature compared to standard temperature measurements. [1] Find out more here.

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Do you want to use the core body temperature sensor to perform patient monitoring?

We’ll be happy to help you finding the right solution to your project!

  • Discover all the Use Cases related to our technology, here.
  • Explore our product line, here.
  • Discover all the peer-reviewed publications using our technology, here.


[1] Ajčević, Miloš, et al. “A Novel Non-Invasive Thermometer for Continuous Core Body Temperature: Comparison with Tympanic Temperature in an Acute Stroke Clinical Setting.” Sensors 22.13 (2022): 4760.