The Yocto-PT100 is a USB temperature sensor. This is the most accurate USB temperature measurement device that we offer. The module uses an external PT100 probe (not included) to make instant temperature measurements, and can also record measures on a built-in flash memory to read them later on through USB. A PT100 probe is used to measure the temperature at any specific place, including in a liquid, with a very high stability and a high accuracy(sensibility up to 0.01C and accuracy up to 0.03C at 0C when using a PT100 conforming to IEC 60751 DIN 1/10 B standard). It is particularly well suited for applications such as laboratory measurements, etc.

The Yocto-PT100 can be used with PT100 probes using 2, 3 or 4 wires. The type of connection is setup in software. To reach the highest accuracy, a 4-wire probe should be used. 3-wire probes are reasonably accurate and not too much affected by wire lengths, contrarily to 2-wire probes which are the least accurate and very sensitive to wire length.

The Yocto-PT100 features a built-in galvanic isolation between the USB control part and the PT100 measure circuit. It is therefore possible to use non-insulated PT100 probes, which are often more reactive and less expensive,

Given the number of variants of PT100 probes and their prices, the Yocto-PT100 does not include any probe. The probe must be purchased separately at a specialized shop.

This device can be connected directly to an Ethernet network using a YoctoHub-Ethernet, to a WiFi network using a YoctoHub-Wireless-n and to a GSM network using a YoctoHub-GSM.

Yocto-PT100 Yocto-PT100 Yocto-PT100 Enclosure available separately

USB cables and enclosures to be ordered separately.

CHF 90.31

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Hardware release:Rev. C
Product ID:PT100MK1
Product name:Yocto-PT100
USB connector:micro-B
Refresh rate:15Hz
Measuring range (T):-200...325C
Protection class, according to IEC 61140:class III
USB isolation, dielectric strength (1 min.):1.5kV
Normal operating temperature:5...40C
Extended operating temperature2:-30...85C
Supported Operating Systems:Windows (PC + IoT), Linux (Intel + ARM), macOS, Android
Drivers:Driverless, no driver needed
API / SDK / Libraries:C++ Obj-C C# VB.NET UWP Delphi Python Java Android LabVIEW
API / SDK / Libraries (TCP only):Javascript Node.js PHP
RoHS compliance:RoHS III (2011/65/UE+2015/863)
Suggested enclosure:YoctoBox-Long-Thick-Black
Harmonized tariff code:9032.9000
Cables and enclosures:available separately
Made in:Switzerland

1 These specifications are for the current hardware revision. Specifications for earlier revisions may differ.
2 The extended temperature range is defined based on components specifications and has been tested during a limited duration (1h). When using the device in harsh environments for a long period of time, we strongly advise to run extensive tests before going to production.

Accessories and related products

YoctoBox-Long-Thick-Black, Enclosure for Yoctopuce device (long, thick, black)Fix-2.5mm, screws and spacersUSB-A-MicroB-50, USB 2.0 type A to Micro-B data cable, 50 cmYoctoHub-Ethernet, Ethernet-enabled hub for Yoctopuce modules

Related articles and application examples


User manual (HTML)
User manual (PDF)
Product brief
3D file (STEP)
RoHS certificate
Most recent firmware45886 (08/06/2021)
Programming libraries45664 (06/29/2021)
Command line API45975 (08/13/2021)
VirtualHub application46606 (09/28/2021)

Add a comment 5 comments

1 - jjarandato Wednesday,march 23,2016 6H05

This yocto-pt100 can be configure to measure a SPRT with constants that corresponse to ITS-90?

2 - mvuilleu (Yocto-Team)Wednesday,march 23,2016 6H30

@jjarandato There are 3 aspects to this question:
1) the absolute precision
2) the resistance range
3) the format of correction factors:

Regarding 1, the absolute precision of this device has been verified to match the requirements for Secondary SPRTs (0.03C), but we have not checked for a higher precision. If you really need 0.001C, you will probably need a more precise device, I doubt we can be as precise in absolute value.

Regarding 2, this device applies the resistance-to-temperature function for PT100. If you need to use SPRT in the ~25 Ohm range, you could work from the measured resistance value (without using the internal mapping), but you will be out of the sweet spot of the device for resistance measurement and will probably loose a bit of precision

Regarding 3, the device features a built-in mechanism for 5-points linear calibration function, but not another more specific format

3 - tetaran Thursday,april 21,2016 18H09

I'm curious if its possible to use your PT100 with 44212EC sensor without major modifications and to still expect 0.1C accuracy.

4 - mvuilleu (Yocto-Team)Thursday,april 21,2016 19H01

@tetaran: The 44212EC sensor is not a PT100, it is a combination of thermistors using different resistance values. It might be possible to read it using a Yocto-Thermistor, but I am not even sure as I have not digged into the magic of this thermilinear network...

5 - ankit7540 Monday,march 22,2021 9H30

Documenting a solution to the 1386 error when using DLL with LabVIEW : This error (1386 when using the LabVIEW VI with the DotNetProxy DLL) is well known issue. Using an application other than Windows unzip tool ( like WinZip or 7zip) to decompress the downloaded files results in a working DLL.

Otherwise, in my case the solutions given in the documentation did not work.

Yoctopuce, get your stuff connected.