Thermophysical Properties Research Laboratory, Inc.
Phone : 765-463-1581
Four-Probe Electrical Resistivity Apparatus
(ASTM B 193-02)

TPRL, Inc. has two electrical resistivity apparatuses. A room temperature four probe setup and a four probe setup in a furnace that can go up to 1100ÂșC. It involves passing constant direct current through the specimen. Sets of current and voltage terminals are placed on the sample. From the current and the sample dimensions it is possible to get the electrical resistivity (ρ):


where V is voltage, I is current, A is the cross-sectional area, and L is the length.

The data collection is computerized and the results calculated for a set of measurements performed.

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

Copyright 2011 TPRL, Inc.
3080 Kent Avenue
West Lafayette, IN 47906
Last updated 1/5/2012