Solution for core
temperature monitoring

Solution for core temperature monitoring

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 e-Celsius® Performance solution makes possible to collect continuous, reliable and accurate core temperature data while preserving their subjects’ comfort and mobility. 

It is composed of 4 elements :

An electronic capsule, e-Celsius® 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 e-Celsius® 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).

A monitor, e-Viewer® Performance, receives and records the data transmitted by the capsule.
The communication distance between the capsule and the monitor 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 monitor and the capsule, an automatic data synchronization is thus possible, a posteriori. The same monitor can manage up to three capsules simultaneously in order to manage several subjects in parallel or for extended use.

An activator
An activation box allows to take the e-Celsius® Performance capsule out of standby mode, it allows to activate and associate it with the e-Viewer® Performance monitor.

  A dedicated interface : ePerformance Manager
         PC and MAC compatible software, allows through wire connection to retrieve the data stored in the monitor for archiving or scientific                       exploitation. 

Key figures

e-Celsius® 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 

e-Viewer® Performance monitor

  • 3 capsules per monitor
  • Multichannel: 7 monitors in parallel
  • Storage: 150 000 data per capsule
  • Autonomy: 24/36h
  • Size: 120mm x 70mm x 15mm
  • Activator size: 69mm x 59mm x 31mm

Key benefits

Designed by physiologists, the solution was developed to combine comfort and ease of use. The e-Celsius® 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 ;

eCelsius monitor - body temeperature measurment

e-Celsius® Performance capsule

eViewer Performance

e-Viewer® Performance monitor

Various applications: Sport, Research & Clinical

The e-Celsius® 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 e-Celsius® 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 core temperature circadian rhythm, which is critical for sleep analysis and sleep disorders diagnosis

For more details on use cases do not hesitate to consult the “What is it for?”

Scientific references:

Huang et al., 2020 Ingestible sensors correlate closely with peripheral temperature measurements in febrile patients.

Taylor et al 2019 Limiting the Rise in Core Temperature During a Rugby Sevens Warm-up With an Ice Vest. Int

Racinais et al 2018 Core temperature up to 41.5ºC during the UCI RoadCycling World Championships in the heat

Stevens, 2020 Core Temperature Responses to Elite Racewalking Competition

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

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

You are interested in the e-Celsius® Performance system ?