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CALERAresearch  - Core body temperature monitor for research applications

 CALERAresearch 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 sports activities, at work, or all day long:

CALERA Research uses the same hardware as CORE but comes with additional functionalities and services specifically designed for Research purposes. More information available Core Body Temperature for Research Application.

For research topics we recommend CALERA Research, which will give you access to high-resolution data and several benefits often appreciated by our researchers:

  • Raw Data Access
    • More data stream; E.g. core temp / skin temp / accelerometer / Heart rate (ext. device) / Heat flux*
    • Run future algorithms on previously collected data
    • Highest resolution (1 measurement per second)
  • Remote Support 
    • We can help you in setting up your studies
    • Data interpretation
  • Highest Accuracy
    • Individually calibrated devices
  • Store Data on CORE
    • 3,5 days of storage time (upgrade to 7 days will follow in near future)
    • No loss in data due to bad connection
  • CALERAresearch tool
    • Control multiple devices simultaneously from your PC/MAC

*Heat flux is only available on agreement


  • Compact: 50 mm x 40 mm x 8.35 mm and weighs 12 grams
  • Highly accurate core body temperature: ±0.56 °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 (refer to IPX7) 
  • Bluetooth BLE & ANT+ Connectivity
  • APP support: iOS, Android, WatchOS, Wear OS, and Garmin ConnectIQ.

CALERAresearch includes:

  • CALERAresearch measuring device
  • USB charging cable
  • Adhesive patches
  • CALERA quick start guide, warranty and manual. 


Do you want to use CALERAresearch for medium /high physical activity?

Turn on your heart rate monitor and click the heart rate icon. The app will guide through the pairing setup.

Medical Use
CALERAresearch is not medCE or FDA certified and must not be used for medical nor diagnostic purposes. CALERAresearch can be sold as a clinical thermometer for use in the United States. 
Further Details.


CALERAresearch has a warranty of one year under Swiss law.
Article number:
CALERAresearch includes:
1 CORE® Body Temp Patch, 6 medical grade double-sided adhesive tapes, 1 Android/iOS App for data downloading, 1 USB charging cable.
Dimensions (diameter x thickness x hight) [mm]:
50 mm * 40 mm * 8.35 mm
Mass including battery [g]:
Power supply:
Rechargeable lithium-polymer battery (via USB)
Battery life (Standby) [days]:
Constant transmit time >6 (60)
Data storage capacity [hours]:
Sampling rate [Hz]:
Skin temperature accuracy [°C]:
±0.05°C (typical) or ±0.13°C (max) from 20°C to 42°C
Body temperature accuracy on chest compared to electronic ingestible pills [°C]:
± 0.28 (1σ) ;± 0.21 (MAD) (chest)
Individual calibration at greenTEG
Charging time:
~ 2 hours (full battery)
IP rating:
IP 67
Product features:
- Smartphone application (Android/iOS/WatchOS/Wear OS/Garmin) - Live display of current skin and body temperature (via app) - Standard BLE temperature profile for any devices