The Yocto-Thermocouple device is a USB temperature sensor. It will let you perform via USB instant temperature measurements on two thermocouple inputs, as well as as record the measures on its internal flash for later retrieval when connected again by USB. Thanks to the use of thermocouples, this tiny module can measure the temperature of liquids, small objects, food, mechanical pieces, ovens, etc. It is very reactive to quick temperature changes (detection in 30 [ms], stable measure in 100 [ms]).

The use of thermocouple makes it easy to measure a temperature away from the module. However, if you would need to measure something dozens of meters away, you can avoid to use an expensive long thermocouple by moving the thermocouple inputs further away from the USB connector: simply split the board into two parts and solder a 4-wire cable on the designated pads.

This device ships with two 50cm fine-wire twisted-pair thermocouple cables type K, which can be used to measure temperatures between -75░C and 260░C (PFA isolated, measure point non-isolated). To use a wider measure range of the device, you can use any more sophisticated thermocouple that you will find on a specialized shop.

This device can be connected directly to an Ethernet network using a YoctoHub-Ethernet, or to a WiFi network using a YoctoHub-Wireless-g.

Yocto-Thermocouple Yocto-Thermocouple Yocto-Thermocouple

USB cables and enclosure to be ordered separately.

CHF 48.60

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Manufacturer Product Number
Product name
Type K,E,J,N,R,S,T
20 mm
45 mm
4.5 g
USB connector
Refresh rate
5 Hz
1░C 1%
0.2░C 0.3%
Max. temperature
1768 ░C
Min temperature
-200 ░C
Supported Operating Systems
Windows, Linux (Intel + ARM), Mac OS X, Android
no driver needed
API / SDK / Libraries (USB+TCP)
C++, Objective-C, C#, VB .NET, Delphi, Python, Java/Android
API / SDK / Libraries (TCP only)
Javascript, Node.js, PHP, Java
Suggested enclosure
Cables and enclosures
available separately
Made in

Related articles and application examples

 Cook and Hold with Raspberry Pi (video)  Comparison of temperature sensors  Turn your Raspberry Pi into a network multimeter  What happens inside the fridge? 

Accessories and related products

YoctoBox-Short-Thick-Black, Enclosure for Yoctopuce device (short, thick, black)YoctoBox-Short-Thick-Transp, Enclosure for Yoctopuce device (short, thick, transp)Micro-USB-Hub, Micro USB hub with solder pads, for DIY useFix-2.5mm, screws and spacersUSB-A-MicroB-30, A to micro-B USB data cable, 30cmFlat-Cable-Solid100, Ribbon cable 1.27mm pitch, tinned solid copper, 100cm


User manual (HTML)
User manual (PDF)
3D file (STEP)
Last firmware (release 15430, 03/13/2014)
Library for Javascript (release 19218, 02/02/2015)
Library for PHP (release 19218, 02/02/2015)
Library for Objective C (release 19218, 02/02/2015)
Library for C++ (release 19218, 02/02/2015)
Library for C# (release 19218, 02/02/2015)
Library for VisualBasic .NET (release 19218, 02/02/2015)
Library for Delphi (release 19218, 02/02/2015)
Library for Python (release 19218, 02/02/2015)
Library for Java (release 19218, 02/02/2015)
Library for Android (release 19218, 02/02/2015)
Library for Command line (release 19218, 02/02/2015)
Virtual Hub for Windows (release 19218, 02/02/2015)
Virtual Hub for Linux, Intel + ARM (release 19218, 02/02/2015)
Virtual Hub for Mac-OS-X (release 19218, 02/02/2015)

Add a comment 5 comments

1 - edward_valarm Wednesday,may 07,2014 17H28

The Valarm Pro Android app supports up to 4 Yocto-Thermocouple sensors at the same time so you can alert and upload data to the Valarm Tools Cloud with up to 8 channels of temperature! http://www.valarm.net/blog/new-valarm-pro-app-version-1-3-0/

2 - pam Friday,may 30,2014 11H16

Hi I'm wondering how long the thermocouple cables can be? I have a space that I have about 100 feet distance to travel. Also what gauge wire would you recommend?

3 - martinm (Yocto-Team)Friday,may 30,2014 11H44

@pam 20 AWG or thicker wire should be fine as long as you are free of electromagnetic interferences.

4 - petero Sunday,february 01,2015 4H16

Hello. Can this thermacouple (or another) sensor be used to accurately measure soil temperature vs. ambient air temp? What precision would it have?

5 - martinm (Yocto-Team)Sunday,february 01,2015 6H06

@petero : if you're interested in precision, you should choose a Yocto-PT100:

Yoctopuce, get your stuff connected.