File Exchange

image thumbnail

Read a National Instruments USB-TC01 single channel Thermometer in MATLAB

version (3.67 KB) by Rob Purser
Read a National Instruments USB-TC01 single channel thermometer from MATLAB®


Updated 01 Sep 2016

View License

Data Acquisition Toolbox™ software provides a complete set of tools for analog input, analog output, and digital I/O from a variety of PC-compatible data acquisition hardware.
Support for the National Instrument USB-TC01 device was added to Data Acquisition Toolbox in R2011b. If you have R2010b or R2011a, you can use this file plus the Data Acquisition Toolbox to collect data from this device.

obj = TC01(deviceID,probeType) creates an object OBJ representing the device with the DEVICEID assigned by the National Instruments Measurement and Automation Explorer, with the PROBETYPE of 'J','K','T', etc. representing the type of the thermocouple used.

Call the READ method one or more times on the object to retrieve the current temperature in Celsius. The first time this is called, there will be a short delay as the hardware is configured, but additional calls will go faster.

This requires the Data Acquisition Toolbox and MATLAB R2010b or later. Note that this object takes exclusive access to the hardware. To release it, clear the variable that the object is assigned to.

myTemp = TC01('Dev4','J');

ans =

% release the hardware
clear myTemp

For more information about the Data Acquisition Toolbox, visit

Cite As

Rob Purser (2020). Read a National Instruments USB-TC01 single channel Thermometer in MATLAB (, MATLAB Central File Exchange. Retrieved .

Comments and Ratings (4)

Rob Purser

Hi all,

This was a extension to allow access using the Data Acquisition Toolbox in R2010b and 11a. This device is supported in Data Acquisition Toolbox in all releases since. You can just use the regular DAQ workflow.

Here's an example:


I too am getting the same error { Undefined variable "daq" or class "".}. How could it be resolved?

I am currently attempting to use this code on MatLab2014a and i continually get this error "Undefined variable "daq" or class ""." any hints on what to do next?



Updated license

Noted that Data Acquisition Toolbox has built in support for this device in R2011b.

MATLAB Release Compatibility
Created with R2010b
Compatible with any release
Platform Compatibility
Windows macOS Linux