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− | [[File:IButton.jpg|left|thumb]]
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| {{Tool Infobox | | {{Tool Infobox |
| |Category=Observe | | |Category=Observe |
| + | |Related topics=Body temperature tracking |
| }} | | }} |
| + | The '''Thermocron iButton''' is a small hardware device that records the temperature every five minutes onto its non-removable memory. No network (Bluetooth, Wifi, etc.) is required. No other device is required until you want to transfer the logs to a computer to read them. |
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− | The Thermocron iButton is a small hardware device that records the temperature every five minutes onto its non-removable memory. No network (Bluetooth, Wifi, etc.) is required. No other device is required until you want to transfer the logs to a computer to read them.
| + | [[File:IButton.jpg|thumb|alt=|150x150px]] |
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| == Example CSV output == | | == Example CSV output == |
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| * [https://www.maximintegrated.com/en/design/technical-documents/app-notes/5/5917.html Linux] | | * [https://www.maximintegrated.com/en/design/technical-documents/app-notes/5/5917.html Linux] |
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− | == circadiaware's description from [https://circadiaware.github.io/VLiDACMel-entrainment-therapy-non24/SleepNon24VLiDACMel.html] == | + | == Description & Tips == |
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| + | Description taken from circadiaware<ref>https://circadiaware.github.io/VLiDACMel-entrainment-therapy-non24/SleepNon24VLiDACMel.html</ref> |
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| Wrist skin temperature sensor for circadian rhythm phase assessment: Maxim Thermocron iButton [https://www.maximintegrated.com/en/products/ibutton-one-wire/data-loggers/DS1925EVKIT.html DS1925EVKIT] (Starter kit including one [https://www.maximintegrated.com/en/products/ibutton-one-wire/data-loggers/DS1925.html DS1925L iButton] and the DS9490R and DS1402D-DR8+ connectors to retrieve the iButton's data on computers via USB as a CSV file). Cost: about ~$100. If DS1925L is unavailable, can also use DS1922L but the internal memory and battery are much shorter (4 years for DS1925L with 5min sampling rate (setup 300s in the config), 6 months for DS1922L for 2min sampling rate). The iButton does not need to be recharged, but unfortunately once it runs out of battery, it cannot be replaced (although there is [https://www.researchgate.net/publication/270579725_Replacing_the_batteries_on_ibutton_Thermochron_Hygrochron_data_loggers one academic paper which shows how to replace an iButton's battery], but this is not an official instruction, do it at your own risk, and of course the device will be much less airtight after). | | Wrist skin temperature sensor for circadian rhythm phase assessment: Maxim Thermocron iButton [https://www.maximintegrated.com/en/products/ibutton-one-wire/data-loggers/DS1925EVKIT.html DS1925EVKIT] (Starter kit including one [https://www.maximintegrated.com/en/products/ibutton-one-wire/data-loggers/DS1925.html DS1925L iButton] and the DS9490R and DS1402D-DR8+ connectors to retrieve the iButton's data on computers via USB as a CSV file). Cost: about ~$100. If DS1925L is unavailable, can also use DS1922L but the internal memory and battery are much shorter (4 years for DS1925L with 5min sampling rate (setup 300s in the config), 6 months for DS1922L for 2min sampling rate). The iButton does not need to be recharged, but unfortunately once it runs out of battery, it cannot be replaced (although there is [https://www.researchgate.net/publication/270579725_Replacing_the_batteries_on_ibutton_Thermochron_Hygrochron_data_loggers one academic paper which shows how to replace an iButton's battery], but this is not an official instruction, do it at your own risk, and of course the device will be much less airtight after). |
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| ** This setup provides true 24/7 skin temperature monitoring setup, as the iButton DS1925L can last 4 years with its integrated battery (then need to buy another one or can try to manually [https://www.researchgate.net/profile/Sean_Haughian/publication/270579725_Replacing_the_batteries_on_ibutton_Thermochron_Hygrochron_data_loggers/links/54aeabbf0cf29661a3d3a42e/Replacing-the-batteries-on-ibutton-Thermochron-Hygrochron-data-loggers.pdf replace the battery] as some researchers have done). | | ** This setup provides true 24/7 skin temperature monitoring setup, as the iButton DS1925L can last 4 years with its integrated battery (then need to buy another one or can try to manually [https://www.researchgate.net/profile/Sean_Haughian/publication/270579725_Replacing_the_batteries_on_ibutton_Thermochron_Hygrochron_data_loggers/links/54aeabbf0cf29661a3d3a42e/Replacing-the-batteries-on-ibutton-Thermochron-Hygrochron-data-loggers.pdf replace the battery] as some researchers have done). |
| ** Data need to be transferred to a computer every 6 months (for the DS1925L, the interval is much smaller with DS1922L, about 10 days), and the device memory (mission) needs to be reset, otherwise it will stop recording new records. | | ** Data need to be transferred to a computer every 6 months (for the DS1925L, the interval is much smaller with DS1922L, about 10 days), and the device memory (mission) needs to be reset, otherwise it will stop recording new records. |
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| + | == References == |
| + | <references/> |
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| + | [[Category:Tools]][[Category:Hardware]][[Category:Body temperature tracking tools]] |