What is CORE?

The CORE sensor is the only wearable, non-invasive, continuous, and accurate core body temperature monitoring solution. When you get hot, your performance drops. The easy-to-use sensor delivers real-time data so that you can train and race better.

The sensor is validated for endurance sports activities and for everyday activities. Check if it is right for you: validated activities and use-cases for the CORE sensor.

Technical details

The innovative sensor technology is integrated into the compact and waterproof unit that can be comfortably worn during sports activities, at work, or all day long.

Compact Size: 40 mm width x 50 mm height x 8.35 mm depth
Weight: 12 grams
Provides medical-grade accuracy (based on ISO_80601-2-56, Mean Absolute Deviation of 0.21 °C)
Non-invasive (worn on the chest)
Not impacted by environment thermal influences
Battery life: 6 days continuous transmission time (up to 6 weeks with sleep mode)
Rechargeable lithium-polymer battery (USB charging cable supplied)

In addition:

Waterproof up to 1.5m (IPX7)
Bluetooth BLE & ANT+ Connectivity
Connects with: CORE iOS and Android App, WatchOS, Wear OS, Garmin ConnectIQ watches and bike computers, Wahoo bike computers, COROS watches, SUUNTO watches and more...

Inside the box:

CORE sensor
USB magnetic charging cable
6 medical-grade adhesive patches
Clips to secure the sensor
Guide to setup CORE iOS / Android App

Wearing the CORE sensor

The CORE sensor is typically worn on the side of the chest in a consistent position.

For sports, the CORE sensor should be paired to a heart rate monitor for the best results during sports activities. It can be fastened to the heart rate monitor strap (or a sports bra) and secured with the provided clips.

For everyday activity, the medical-grade adhesive patches can be used. The disposable 'sticky patches' can be re-ordered as needed.

Data and Connectivity

CORE has an accompanying Smart Phone App for iOS and Android. With data synchronization, the real-time and historical core body temperature data and performance metrics can be viewed and saved to the CORE cloud (no additional fee).

Popular Smart Watches including Garmin Connect-IQ, AppleWatch, some wearOS watches, COROS and Suunto watches have apps and integration for the CORE sensor. CORE connects to Garmin Connect-IQ and Wahoo bike computers. Many sports devices save the core body temperature data into the FIT file.

The sensor is compatible with popular third-party sports training software and the integration with devices and software continues to grow. This is a list of CORE sensor compatibility.

Video: core body temperature monitoring in overview

Information on CORE for medical use
CORE is not medCE or FDA certified and must not be used for medical nor diagnostic purposes. The CORE sensor can be sold as a clinical thermometer for use in the United States, further details are available here.

Product Safety Information
Warning - This product can expose you to chemicals including Nickel and Nickel compounds, which are known to the State of California to cause cancer, and Bisphenol A (BPA), which are known to the State of California to cause birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov