From 3:00AM CST Saturday, August 15 – 10:00PM CST Saturday August 15, will be undergoing system upgrades that may result in temporary service interruption.

We appreciate your patience as we improve our online experience.

Table Of Contents

4-Wire Resistance

Last Modified: February 16, 2016

Use the 4-wire resistance method, as shown in the following figure, to measure resistances of less than 100 Ω. The 4-wire method is more accurate than the 2-wire method.

The 4-wire method uses four test leads, one pair for the injected current (the test lead) and the other pair for sensing the voltage across the resistor Rmeas (the sense lead). Because no current flows in the sense lead, the device measures only the voltage developed across the resistance. Thus, a 4-wire resistance eliminates errors that test lead and contact resistance cause.

Recently Viewed Topics