Thermophysical Properties Research Laboratory, Inc.
Phone : 765-463-1581
Electrical Resistivity

Electrical resistivity (also known as specific electrical resistance or volume resistivity) is a measure of how strongly a material opposes the flow of electric current.

TPRL, Inc. has two methods of measuring the electrical resistivity of a material: the multi-property apparatus, and the four-probe electrical resistivity apparatus.

The four-probe electrical resistivity apparatus is used for either solids or liquids over a temperature range of -150 C to 1100°C.

The ASTM B193 standard is listed in our ASTM standards list however this exact specifications in the ASTM B193 standard of section of
5. Test Specimen states :

5.2.2 A test length of at least 1 ft or 300 mm.

causes a problem for measuremets. The test sample minium size as stated in the ASTM B193 standard limits the measurements that can be performed over a temperature range unless you have a very large furnace or cooling structure. Instead TPRL uses a standard four-probe electrical resistivity method which can get equivalent electrical resisivity results without being limted to a large sample size.

Still not sure what is the best testing method for your material? Use our Testing Method Selector Tool to help you decide.

Thermophysical Properties Measured

Thermal Conductivity

Thermal Diffusivity

Specific Heat

Thermal Expansion

Electrical Resistivity


Thermal Gravimetric Analysis & Simultaneous Thermal Analysis


ASTM Methods

Sample Sizes & Definitions

Test Selector Tool

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3080 Kent Avenue
West Lafayette, IN 47906
Last updated 5/21/2021