This is the type of device that I’d rent for month if they offered that type of program. Just to test and dial in some heat training protocols. I’d be willing to pay like $30 bucks and then send it back when I’m done. Answer from Stevie_Dee on trainerroad.com
Slowtwitch
forum.slowtwitch.com › triathlon forum
Core body temperature sensor substitute - Triathlon Forum - Slowtwitch Forum
July 30, 2024 - Original core brand is kind a expensive for me. Is there any senaor that can do the same or what can i use. I am just curious about this body temperature thig that is going right now. Is there any aliexpress variant? :slight_smile: Or i kust simply use my thermometer for measuring temperature ...
MDPI
mdpi.com › 2076-3417 › 13 › 11 › 6803
Assessing Non-Intrusive Wearable Devices for Tracking Core Body Temperature in Hot Working Conditions
June 3, 2023 - Due to this limitation, using an ingestible telemetric pill that records gastrointestinal temperature from the time of ingestion until it is expelled has been reported as another way of monitoring the core temperature [14,15,16]. Research has shown that the temperature measurements taken by these telemetric pills are comparable to measurements taken from the esophagus and rectum during physical activity in hot environments [17]. One example of this pill is the Ingestible Core Body Temperature Sensor (ICTS) developed by CorTemp®. When the ICTS has been ingested, the signal from the sensor is h
Core 2 Body Temp Sensor Released Today
They are doing a trade in program for those with the Core 1 sensor. And interestingly enough Zwift will be adding support for body temperature: Would love to see TR do the same. More on trainerroad.com
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March 25, 2025Core body temperature sensor substitute - #9 by Road_to_226 - Triathlon Forum - Slowtwitch Forum
Just how high should room tempreaure be??I don’t follow this. You just take a normal household thermometer, put it under your tongue, and in a moment it will show your core temperature. How high should i warm my trainig ROOM? Room. Place when i train. Pain cave. More on forum.slowtwitch.com
body temperature sensor?
You're only ever going to be able to measure skin temperature rather than body temperature, unless you keep the sensor in your mouth, ear or rear entrance all the time. AFAIK, skin temperature is fairly useless for what you want to do with it. There are medical-grade temperature sensors that you can swallow, but they last only until your next #2 and I doubt they're available to consumers to be honest. More on reddit.com
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March 3, 2023Core temperature sensor
I just ride with a meat thermometer up my bung More on reddit.com
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September 21, 2024Videos
06:02
Core Body Temperature Sensor Review - YouTube
18:01
Too Hot When Exercising🏃🥵? Measure Your Core Body Temperature!
13:28
Core Body Temperatur Sensor im Test deutsch - YouTube
17:19
HEAT TRAINING ZONES W/ THE CORE BODY TEMPERATURE SENSOR - YouTube
46:55
Core Body Temperature Sensor long term review | TomLeeCycling - ...
15:24
Core Sensor Brief Overview - YouTube
PubMed Central
pmc.ncbi.nlm.nih.gov › articles › PMC2465229
The ingestible telemetric body core temperature sensor: a review of validity and exercise applications - PMC
Ingestible telemetric temperature sensors represent an alternative to oesophageal and rectal temperatures as an index of core temperature during exercise.
PubMed Central
pmc.ncbi.nlm.nih.gov › articles › PMC9043456
Non-Invasive Monitoring of Core Body Temperature for Targeted Temperature Management in Post-Cardiac Arrest Care - PMC
SpotOn™ is applied to the forehead, creates an isothermic tunnel under the measurement site by insulating heat loss from the skin surface, and estimates core body temperature using the zero-heat-flux technology (7). In perioperative settings, SpotOn™ showed good correlation, accuracy, and precision when compared to esophageal, nasopharyngeal, and pulmonary artery sensors (8–10) and was better than bladder temperature sensors (10).
ScienceDirect
sciencedirect.com › science › article › abs › pii › S0360132325007681
Validity of the wearable CORE temperature sensor during 8-hour indoor heat exposure with and without electric fan use - ScienceDirect
June 11, 2025 - The pulmonary artery catheter is the gold standard for core temperature measurement as it has a quicker response rate but is limited to clinical and surgical settings due to its invasiveness [7,8]. Esophageal temperature is considered the most ...
TrainerRoad
trainerroad.com › equipment
Core 2 Body Temp Sensor Released Today - Equipment - TrainerRoad
They are doing a trade in program for those with the Core 1 sensor. And interestingly enough Zwift will be adding support for body temperature: Would love to see TR do the same.
Published March 25, 2025
Thermalhyperformance
thermalhyperformance.com.au › post › core-temperature-wearables-are-we-there-yet
Core Temperature Wearables - Are We There Yet?
April 8, 2026 - Unlike the CORE and Kenzen options, Cosinuss° is an "in-ear" sensor with a battery life of up to 24hrs. Cosinuss° states "Our ergonomic wearables offer a more cost-effective and accurate alternative to the competition for measuring the following: blood oxygen saturation, core body temperature, heart rate, heart rate variability, respiratory rate and position/acceleration".
PubMed Central
pmc.ncbi.nlm.nih.gov › articles › PMC12900156
A Comprehensive Review of Non-Invasive Core Body Temperature Measurement Techniques - PMC
Ingestible sensors, also referred to as smart pills, are non-invasive monitoring technologies that are orally administered, introduced into the gastrointestinal (GI) tract, and capable of measuring physiological signals from within the body and wirelessly transmitting the data to an external ...
Core Body Temperature
corebodytemp.com › pages › wearable-core-body-temperature-sensors
Wearable Core Body Temperature Sensors – CORE
A wearable core body temperature sensor, such as CORE, allows for continual, non-invasive measurements. A number of alternatives exist for measuring core body temperature, but they are eithe invasive, inaccurate, non-continuous, or some combination of the three.
Slowtwitch
forum.slowtwitch.com › triathlon forum
Core body temperature sensor substitute - #9 by Road_to_226 - Triathlon Forum - Slowtwitch Forum
July 30, 2024 - Just how high should room tempreaure be??I don’t follow this. You just take a normal household thermometer, put it under your tongue, and in a moment it will show your core temperature. How high should i warm my trainig ROOM?
BioMedical Engineering OnLine
biomedical-engineering-online.biomedcentral.com › articles › 10.1186 › s12938-023-01081-3
Free-living core body temperature monitoring using a wrist-worn sensor after COVID-19 booster vaccination: a pilot study | BioMedical Engineering OnLine | Full Text
March 13, 2023 - Comparison of zero heat flux and double sensor thermometers during spinal anaesthesia: a prospective observational study. J Clin Monit Comput. 2022. https://doi.org/10.1007/s10877-021-00799-6. ... Janke D, et al.
Reddit
reddit.com › r/homeassistant › body temperature sensor?
r/homeassistant on Reddit: body temperature sensor?
March 3, 2023 -
not a real HA topic, but is there any good way to track body temperature? In case someone is ill and have fever, do we have decent sensor to measure body temperature? I would like to make a strap on/wearable device (doesn't need to be portable) that could be used in case virus hits someone hard and you stay in the bed. Unfortunately it is easier to make diy ECG than body temp sensor.
Am I stupid? Also... where is a decent point to attach such a device for prolonged period of time? I doubt one want to spend whole day with sensor inside mouth...
Edit: sensor I mean sensor module for DIY sensor for arduino/ESPhome.
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You're only ever going to be able to measure skin temperature rather than body temperature, unless you keep the sensor in your mouth, ear or rear entrance all the time. AFAIK, skin temperature is fairly useless for what you want to do with it. There are medical-grade temperature sensors that you can swallow, but they last only until your next #2 and I doubt they're available to consumers to be honest.
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My first thought is a watch. You'd need to look at specs and do some research but I hope apps like Google Fit that can track temperature etc have their data in a cloud friendly format. Just checked ... They do have a rest api that could be used.
Reddit
reddit.com › r/velo › core temperature sensor
r/Velo on Reddit: Core temperature sensor
September 21, 2024 -
Those of you who bought a core temperature sensor, was it worth it? If you dont want to use it for heat training specifically, is it useful for general training as well? Like can you wait till your body body has cooled down again between efforts and improve training quality that way or stuff like that? Especially on the trainer where heat is generally an issue.
Also the only company I know of that makes a sensor is greenTEG and it costs 280€. Thats a hell of a lot for a freakin thermometer with a bluetooth/ANT+ function. Hopefully some asian company realizes that they can make a bit of money and comes up with a cheaper option to sell on aliexpress.
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I just ride with a meat thermometer up my bung
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no. it's super slow to respond. you'd be waiting 15-20 minutes for a drop. might as well just go off hr. also, no, it's not worth it and no, it's not even really that useful for heat training (i.e., at the beginning of the summer it absolutely sucks, and by August you've acclimated a bit and it still sucks but is more manageable). the core sensor doesn't tell you anything more than what you already know. and the sensor itself has a very flimsy clip that almost assuredly will break, probably a fe wdays after the warranty. and the clip is the actual sensor, so there's no replacing it. the only recourse is a paltry discount on another very expensive sensor.
Arduino Forum
forum.arduino.cc › projects › general guidance
Which sensor should I use to measure body temperature? - General Guidance - Arduino Forum
December 13, 2024 - Hello, I'm starting a new project, and I need a way to get an accurate body temp reading from the forehead. I'm considering using an IR Temperature sensor like an MLX90614 or an MLX90632 and including it in a patch you …
MDPI
mdpi.com › 1424-8220 › 22 › 19 › 7639
Wearable Sensor Technology to Predict Core Body Temperature: A Systematic Review
October 9, 2022 - For this review, wearables were defined as epidermal patches, wrist monitors, and chest straps [54]. Sufficient comparators were defined as ingestible telemetric temperature pills, rectal thermometers, or esophageal thermometers in accordance ...
BikeRadar
bikeradar.com › advice › fitness-and-training › core-2-thermal-sensor
This wearable tech is so effective that Tadej Pogacar's team pays out of its own pocket to use it | BikeRadar
November 12, 2025 - “The heat flux sensor measures the thermal transfer through the sensor – from the skin to your environment – and that's thermal power; if you're working harder, your thermal power is higher.
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In general, thermistors are the sensor of choice for measuring body temperature. They are sensitive, cheap, and their accuracy is adequate. After all, body temperature does not need to be measured to better than about 0.1 degree F.
With that said, measuring body temperature at the wrist is a losing proposition. There are simply too many chances for wrong temperature readings. The wrist, after all, is out at the end of the arms, with lots of opportunity for heat loss, and who knows what your hands have been holding on to.
Another way to look at it is that all available sensors are inadequate - they measure the actual local temperature rather than the body core temperature.
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The problem of monitoring body temperature in a wearable device is were to place the sensor. The skin of arms and legs are known for delivering bad results. The temperature there is some kelvin lower than the body core temperature. The difference is not constant, if you feeel cold, the body reduces the blood flow thru arms and legs in order to keep the body core temperature. The only place for good results is the ear canal.
DC Rainmaker
dcrainmaker.com › 2020 › 08 › sensor-garmin-integration.html
Hands-on: CORE’s New Skin/Body Temp Sensor with Garmin/Wahoo integration | DC Rainmaker
September 2, 2024 - You would be right if you are ... make on-location in Switzerland and is the first wearable sensor that provides medically accurate and continuous core body temperature monitoring. Previously, the main alternative for sports people are ingested e-pills which cost ...
PubMed Central
pmc.ncbi.nlm.nih.gov › articles › PMC9572283
Wearable Sensor Technology to Predict Core Body Temperature: A Systematic Review - PMC
For this review, wearables were defined as epidermal patches, wrist monitors, and chest straps [54]. Sufficient comparators were defined as ingestible telemetric temperature pills, rectal thermometers, or esophageal thermometers in accordance with the previous literature demonstrating the ...
Nature
nature.com › npj flexible electronics › articles › article
Flexible, multimodal device for measurement of body temperature, core temperature, thermal conductivity and water content | npj Flexible Electronics
October 30, 2025 - Although the subjects were asked to keep the axillary temperature patch clamped as tightly as possible, it was inevitable that the subjects would unconsciously unclamp the axillary temperature patch during this long time test, resulting in a temperature drop, as reflected by a sudden temperature change in the patch temperature curve that was not captured by the single-heat-flux sensor at the wrist. Similarly, our device can sensitively capture the temperature drop at the wrist caused by central air conditioning or fan blowing in the laboratory, while axillary temperature patch was difficult to reflect the influence of short-term body surface convection on body surface temperature. Fig. 5: Continuous monitoring of body core temperature. The alternative text for this image may have been generated using AI.