Solution for core
temperature monitoring

Gold standard for core temperature monitoring - Scientifically approved

The temperature variable is a key indicator of the subject’s physiological status. The continuous nature of the measurement is quite difficult to obtain and only a few restrictive devices (rectal, esophageal probes, etc.) allow continuous core temperature monitoring.

Dedicated to non-medical application, the eCelsius Performance solution makes possible to collect continuous, reliable and accurate core temperature data while preserving their subjects’ comfort and mobility. 

The key elements of the system :

An electronic capsule, eCelsius Performance, ingestible and communicating.
The capsule is delivered in unit package. Once activated, it communicates in real time, and continuously, the core temperature data. The single-use eCelsius Performance capsule is removed by natural way; it allows thus to monitor the core temperature over a period corresponding to the transit time (24-48 hours on average).

An activator
The activation box allows to take the eCelsius Performance capsule out of standby mode; it allows to activate and associate it to the receiving device.

Two different equipment configurations allow to retrieve the data from the capsule:

-  ePerf Connecta "Gateway”, receiving and storing the temperature data collected by the capsule. ePerf Connect may be worn as a wristwatch; it sends the data in real time (or a posteriori) to an Android application (ePerf Mobile), using Bluetooth (BLE) protocol. The data can thus be displayed on the screen of the Smartphone or Tablet; the csv file can be downloaded from the device at anytime.

 -  eViewer Performance, a monitor, receiving and recording the data transmitted by the capsule. eViewer Performance monitor only displays the last data data collected in real time. Through a wire connection (USB), data full access is provided thanks to a PC/MAC software (csv file) for archiving or scientific exploitation.

The communication distance between the capsule and the receiving device ranges from 1 to 3m (depending on environment and subject).

The capsule has also its own memory. In case of a communication disruption between the receiving device and the capsule, an automatic data synchronization is thus possible, a posteriori. The same receiving device  can manage up to three capsules simultaneously for extended use.

Key figures

eCelsius Performance capsule

  • Delivered cleaned
  • Storage: 2 years
  • Weight: 1.7g
  • Size: 17.7mm x 8.9mm
  • Sampling period: 15s, 30s, 1min, 2min, 5min
  • Accuracy: 0.2°C
  • Calibration range: 25°C to 45°C
  • FIFO memory: 2000 data capacity
  • Data transfer: RF transmission (433 – 434MHz)
  • Communication range: 1-3m
    (environment and patient dependant)
  • Life duration: 20 days (with F = 30s)

eCelsius Performance activator

  • Activator size: 69mm x 59mm x 31mm
  • Able to active a large number of capsules

ePerf Connect Gateway

  • 3 capsules per gateway
  • Storage: 152 196 data per capsule
  • Autonomy: Up to 5 days
  • Water resistant: Up to 5 ATM
  • Size: 52mm x 25mm x 15mm

eViewer Performance monitor

  • 3 capsules per monitor
  • Multichannel: 7 monitors in parallel
  • Storage: 150 185 data per capsule
  • Autonomy: 24/36h
  • Size: 120mm x 70mm x 15mm

Key benefits

Designed by physiologists, the solution was developed to combine comfort and ease of use. The eCelsius Performance solution is currently the only solution on the market allowing continuous core temperature monitoring without any constraint for the subject. 

Thanks to the on-board memory in the capsule, temperature monitoring can be continuous, without the need to wear the monitor continuously. 

Key advantages of the system:

Improve the conditions for subjects monitoring;

Preserve ecological monitoring condition (real life, competition, field exercise, ...);

Secure tests and protocols;

Reduce recruitment constraints;

Limit artifacts associated to the operator;

Improve decision-making through reliable and accurate data and access to a complete history.

Multi-parametric monitoring

BodyCAP and Equivital have joined forces to offer to researchers a new multiparametric monitoring solution: a simultaneous use of eCelsius Performance and eq02+ LifeMonitor solution is now possible. 

Core temperature data

Heart rate

Respiration rate

Skin temperature


The Equivital – eCelsius Performance system keeps the successful key feature of eCelsius Performance: real time monitoring and buffered core temperature data access. 

Combined with Equivital’s eq02+ LifeMonitor, the solution gives you easy access to a multi-parametric physiological dataset

The global solution allows to monitor up to 8 subjects simultaneously thanks to its dedicated EQ-eViewer Performance monitor.

All data and parameters collected by both the EQ-eViewer Performance monitor and the eq02+ LifeMonitor can be downloaded, stored and analysed in the same file thanks to the specific software EQ-Manager. 

eCelsius monitor - body temeperature measurment

eCelsius Performance capsule

ePerf Connect Gateway & ePerf Mobile application

eCelsius monitor - body temeperature measurment

eViewer Performance monitor

Various applications: Sport, Research & Clinical

The eCelsius Performance solution meets the need for continuous core temperature monitoring in many applications.

Clinical and basic research

The temperature variable is regularly part of the “Primary outcomes” in the context of a clinical trials. Continuous, reliable and accurate temperature monitoring allows to secure the protocols without adding any constraints for the subject and the operator.

Prevention of hyperthermia
and hypothermia

Long duration exercises performed in hot environment induce potential rise in core temperature that could range from hyperthermia to heat stroke. The constraint is similar for people exercising in cold condition; hypothermia risks have to be anticipated.

Thermoregulation process efficiency evaluation

In the context of sports performance, thermoregulatory responses are very different among individuals. Objective measurement of the core temperature during  exercise allows to individualize training processes. The eCelsius Performance solution allows individualization of  heat acclimatization protocols and better preparation for competitions in hot environments.


Core temperature is a key indicator of the subjects’ biological rhythmicity. Continuous monitoring of this variable allows the characterization of the core temperature circadian rhythm, which is critical for sleep analysis and the sleep disorders diagnosis.

For more details on use cases do not hesitate to consult the brochure

Scientific references:

Chavineau et al., 2021, Effect of the Depth of Cold Water Immersion on Sleep Architecture and Recovery Among Well-Trained Male Endurance Runners

Gard et al., 2021 - Selective head–neck cooling after concussion shortens return-to-play in ice hockey players

Racinais et al., 2022, Association between thermal responses, medical events, performance, heat acclimation and health status in male and female elite athletes during the 2019 Doha World Athletics Championship

Ioannou et al., 2021, Effects of heat on behavioral and physiological mechanisms of the human thermoregulatory system during rest, exercise, and work

McGarr et al, 2020 - Heat strain in children during unstructured outdoor physical activity in a continental summer climate

Riera et al., 2021, Impact of a Cold Environment on the Performance of Professional Cyclists A Pilot Study

Øivind Høiseth et al., 2021, Core Temperature during Cold-Water Triathlon Swimming

Sakamoto et al., 2021, Wearing a face mask during controlled-intensity exercise is not a risk factor for exertional heatstroke A pilot study

Chabert et al.,2021, Temperate Air Breathing Increases Cycling Performance in Hot and Humid Climate Environment

Do not hesitate to consult us and ask us for more, eCelsius Performance system is mentioned in many publications.

You are interested in the eCelsius Performance system?