CALERA Research - Core body temperature monitor for research applications

CALERA Research is the premium Core Body Temperature monitoring solution by greenteg.

The innovative sensor technology is built into a compact waterproof device that can be comfortably worn during controlled study settings,  sports activities, at work, or all day long:

CALERA Research comes with functionalities and services specifically designed for research purposes. This includes access to high resolution data and several benefits often appreciated by researchers:

Advantages

• Raw Data Access
  • More data stream; E.g. core temp / skin temp / accelerometer / Heart rate (ext. device) / Heat flux*
  • Highest resolution (1 measurement per second)
• Remote Support 
  • We can help you in setting up your studies
  • Data interpretation support
• Highest Accuracy
  • Individually calibrated devices
• Store Data on CALERA
  • 6,5 days of storage time 
  • No loss in data due to bad connection
• Research tool
  • Control multiple devices simultaneously from your PC/MAC
  • manage download of the data in easily accessible .csv file

*Heat flux is only available on agreement

Features

• Compact: 50 mm x 40 mm x 8.35 mm and weighs 12 grams
• Highly accurate core body temperature: ±0.3 °C
• Non-invasive (used on the chest) and continuous
• Not impacted by environment thermal influences
• Battery life: 6 days continuous transmission time (up to 6 weeks with sleep mode)
• Rechargeable lithium-polymer battery (via USB cable supplied)

• Waterproof up to 1.5m and sweat proof (IP68 Certification)
• Bluetooth BLE & ANT+ Connectivity
• App support: iOS, Android

CALERAresearch includes:

• CALERA Research measuring device
• USB charging cable
• Adhesive patches
• CALERA quick start guide, warranty and manual.
• CALERA Research app 
• Research tool for Mac/Windows

CALERA Research app is available:

For more information please visit our website.

Medical Use
CALERA Research is not medCE or FDA certified and must not be used for medical nor diagnostic purposes. 

Validation Studies

The accuracy and reliability of our CALREA research device has been validated in the following peer-reviewed publications:

[1] Ajčević, M., Buoite Stella, A., Furlanis, G., Caruso, P., Naccarato, M., Accardo, A., & Manganotti, P. (2022). A Novel Non-Invasive Thermometer for Continuous Core Body Temperature: Comparison with Tympanic Temperature in an Acute Stroke Clinical Setting. Sensors, 22(13), 4760. https://doi.org/10.3390/s22134760

[2] Wu, F., Langer, P., Shim, J., Fleisch, E., & Barata, F. (2024). Comparative Efficacy of Commercial Wearables for Circadian Rhythm Home Monitoring from Activity, Heart Rate, and Core Body Temperature. IEEE journal of biomedical and health informatics, PP, 10.1109/JBHI.2024.3471254. Advance online publication. https://doi.org/10.1109/JBHI.2024.3471254

[3] Kubota, Naoko & Okada, Kazufumi & Yamanaka, Yujiro. (2025). Circadian Phase Assessment of Core Body Temperature Using a Wearable Temperature Sensor Under the Real World. Sleep Science. 10.1055/s-0044-1800785.

[4] Januário, W. M., Lessa, N. F., Schittine, A. J. O., Prata, E. R. B. A., Marins, J. C. B., Natali, A. J., Wanner, S. P., & Prímola-Gomes, T. N. (2024). Validity and reproducibility of the CALERA Research Sensor to estimate core temperature at different intensities of a cycling exercise in the heat. Journal of thermal biology, 123, 103907. https://doi.org/10.1016/j.jtherbio.2024.103907