iconQTenki : Free data logger software for our sensor products
Our free software to record data from our USB sensors products such as Temperature, Humidity and pressure.

Product Description:

This data logger features an easy to use graphical user interface supporting all our USB sensors products. The built-in graphing module provides a quick and easy way to visualize data. Also records data to text files (configurable format) to be imported into spreadsheet or graphing software for further analysis.


  • Works under Windows (XP, Win7/8/10 64&32-bit).
  • Also works under Linux (instructions) and MacOS X.
  • Records captured data to text files. (configurable format)
  • Realtime graphing tab added in version 2.0.0. Graphs can saved to PDF, PNG, JPEG and BMP.
  • Configurable measurement units (°C, °F, Kelvin...)
  • Can add timestamps (configurable format)
  • Configurable log interval. (from 1 second to one year)
  • Generated files can be imported in spreadsheet or graphing software.
  • Supports simultaneous use of multiple sensors on the same computer.
  • Can display real-time measurements using a large font (Big View tab).
  • Log file can be viewed with new data appearing in real time.
Free download available from the Links & Downloads tab.

Picture Gallery:

Download(s) & Link(s):
2.1.11October 1, 2017 usbtenki-2.1.11.tar.gz (1.3 MB)
qtenki-install-2.1.11.exe (8.1 MB)
  • [General] Add thermocouple support
  • [Command-line] Add a new command to usbtenkisetup for thermocouple type configuration
2.1.10August 8, 2017 usbtenki-2.1.10.tar.gz (1.3 MB)
qtenki-install-2.1.10.exe (8.1 MB)
  • [QTenki] Fix a possible hang/crash issue
2.1.9August 7, 2017 usbtenki-2.1.9.tar.gz (1.3 MB)
qtenki-install-2.1.9.exe (8.1 MB)
  • [General] Add support for VOC sensor
  • [Windows] Fix driver installation
    2.1.8June 26, 2017 usbtenki-2.1.8.tar.gz (891.1 KB)
    qtenki-install-2.1.8.exe (7.2 MB)
    • [General] Add SHT35 sensor support
      2.1.7April 7, 2017 usbtenki-2.1.7.tar.gz (891 KB)
      qtenki-install-2.1.7.exe (7.2 MB)
      • [Command-line] Enable line buffered mode to support piping the output in log mode. Under Windows, buffering is completely disabled to acheive this.
      • [Command-line] Fix a 2.1.6 bug where the logging interval (-I argument) was ignored on Windows.
      File types:
      • .exe: Installer for Windows.
      • .tar.gz: Source code. Platform independent, but often used for Linux)

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