Thermistor Measurements on the PXI Platform

Updated Oct 9, 2018

Reported In

Hardware

  • PXI Chassis
  • PXIe-4353
  • PXIe-4357

Driver

  • NI-DMM
  • NI-SWITCH

Issue Details

I want to take thermistor measurements (2-wire or 4-wire) using a PXI(e) chassis. However, I can't seem to find any PXI(e) modules that read thermistors. How can I acquire thermistor data on the PXI platform? Can I use one of the NI PXI temperature input modules?

Solution

National Instruments recommends using our line of high-precision DMMs to take thermistor measurements on the PXI platform. Because thermistors are active sensors, they require precise excitation. Our PXI(e) temperature modules are designed specifically for thermocouples and RTD's and cannot be used to accurately measure resistance over the large range of possible values required by thermistors.

If you require a higher channel count to read various thermistors, we recommend pairing it with one of our multiplexing switch modules.  

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