CORE 2 Thermal Sensor

Key Benefits

• Improves training by monitoring real-time core temperature changes.
• Tracks heat strain to help manage performance and recovery.
• Guides safe heat training through personalised zone insights.
• Supports long-term adaptation with measurable progress scores.
• Lightweight, wearable sensor with app integration, and 6-day battery life.

The CORE 2 Thermal Sensor is the world’s most advanced wearable for real-time core body temperature monitoring—now redesigned to be 48% smaller and 30% lighter. Built for serious athletes, it helps you master thermoregulation so you can train smarter, adapt faster, and perform better.

Heat is a powerful training tool—done right, it can improve endurance, pacing, and recovery. CORE 2 makes this safe and measurable. With features like the Heat Strain Index and Heat Zones, it shows how hard your body is working to cool itself. The Heat Training Load and Heat Adaptation Score help track progress over time, guiding you towards adaptations that unlock performance gains.

Seamlessly integrating with Garmin, Wahoo, and other ANT+ or Bluetooth devices, CORE 2 connects your heat data to your existing training ecosystem. With a six-day rechargeable battery, it’s built to last through the toughest training weeks. Lightweight, non-invasive, and data-rich, CORE 2 is the definitive tool for mastering thermoregulation and pushing athletic potential further.

What’s In The Box?
-CORE 2 Thermal Sensor
-CORE 2 HRM Strap Clip
-Magnetic USB-C Charging Cable
-Product Information Guide
-Fully Recyclable Packaging

Technical Specifications
Compact Size: 41.9 x 29.4 x 7.1mm (no clip) | 45.1 x 32.6 x 9.6mm (with clip)
Weight: 8.6g (no clip) | 11.4g (with clip)
Battery: 6 days; up to 30 days with standby mode enabled
Power Supply: USB-C magnetic adapter cable (included)
Connectivity: Bluetooth low energy (BLE), ANT+ (2.4 GHz band)
Waterproof: up to 1.5m (IPX7 rating)
Research-backed accuracy: mean difference range of -0.01°C to +0.23°C