深部体温センサー CORE Calera

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Product Overview
Calera® is CORE’s premium core body temperature monitoring solution for research use cases. 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. CORE Calera® comes with functionalities and services specifically designed for research purposes, including access to high-resolution data and several benefits often appreciated by researchers.

Advantages

• Raw Data Access
  • More data streams: core temperature, skin temperature, accelerometer, optional heart rate (external device), optional heat flux*
  • Highest resolution: 1 measurement per second
  • For most precise sports data, pairing with a heart rate monitor is recommended to help convert measured heat flux into core body temperature. During everyday (non-sports) activity, core temperature data is accurate with or without a heart rate monitor.
• Remote Support
  • Assistance with study setup
  • Data interpretation support
• Highest Accuracy
  • Each CORE Calera® device undergoes individual calibration for heat flux and skin measurements to ensure optimal accuracy across devices.
• Store Data on Calera
  • Up to 6.5 days of onboard storage
  • No loss of data due to a bad connection
• Research tool
  • Control multiple devices simultaneously from PC/Mac
  • Manage and download data in easily accessible .csv files

*Heat flux is only available on agreement

Technical Specifications

• Dimensions: diameter x thickness x height: 50 mm × 40 mm × 8.35 mm
• Mass (including battery): 17 grams
• Power supply: Rechargeable lithium-polymer battery (via USB)
• Battery life: 6.5 days of measuring (up to 6 weeks in sleep mode)
• Data storage capacity: up to 6.5 days
• Sampling rate: 1 Hz
• Research-backed accuracy: mean difference range of -0.01 °C to +0.23 °C
• Calibration: Individual calibration at CORE HQ
• Time to full charge: ~2 hours
• Waterproof: Waterproof (immersion to 1.5 m) and sweat proof
• Medical use: Not medCE or FDA certified; must not be used for medical or diagnostic purposes
• Connectivity: Bluetooth BLE & ANT+
• App support: iOS and Android

What’s In The Box

• CORE Calera® sensor
• Securing clips
• USB charging cable
• Adhesive patches
• Bluetooth dongle to connect to desktop PCs
• Calera quick start guide, warranty and manual
• CORE Calera® app
• Research tool for Mac/Windows

Warranty Information
CORE Calera® has a warranty of one year under Swiss law.

The Technology — How Does It Work?
Calera® is a wearable device that enables accurate, non-invasive, and continuous core body temperature monitoring. The technology utilizes innovative thermal energy transfer (heat flux) sensors that operate independently of physical activity and environmental conditions.

• Heat-Flux Technology: Calera® combines heat-flux and skin temperature sensors with machine learning algorithms trained on over 1 million data points to calculate core body temperature.

What Is Heat Flux?

• Heat Flux is the rate of heat energy that passes through a surface; it can be expressed in units such as W/m² or W depending on definition.
• Temperature gradient in an environment causes heat to flow from hot to cold; the thermal transfer coefficient of the system is also important.
• A Heat Flux Sensor is a Seebeck sensor: when heat passes through the sensor, it generates a voltage signal proportional to the heat passing through it, enabling industrial or research applications involving temperature gradients across surfaces.

Caractéristiques / Spécifications techniques

• Dimensions: 50 mm × 40 mm × 8.35 mm (diameter × thickness × height)
• Poids (avec batterie): 17 g
• Alimentation: batterie lithium-polymère rechargeable (USB)
• Autonomie: 6,5 jours de mesure (jusqu'à 6 semaines en mode veille)
• Taux d'échantillonnage: 1 Hz (1 mesure par seconde)
• Stockage de données: jusqu'à 6,5 jours
• Exactitude (recherche): différence moyenne -0.01 °C à +0.23 °C
• Calibration: calibration individuelle
• Étanchéité: immersion jusqu'à 1,5 m et résistant à la sueur
• Connectivité: Bluetooth BLE et ANT+
• Compatibilité application: iOS et Android