Gauge Factor Calculator

Formula

The formula to calculate the gauge factor (GF) is:

\[ GF = \left( \frac{\Delta R}{R} \right) / \epsilon \]

Where:

Gauge Factor (GF): The sensitivity of a strain gauge, defined as the ratio of fractional change in electrical resistance to the fractional change in length (strain).
Change in Resistance (ΔR): The difference in resistance measured before and after strain is applied.
Original Gauge Resistance (R): The initial resistance of the strain gauge before any strain is applied.
Strain (ε): The fractional change in length of the material being measured.

Let's say the change in resistance is 0.5 ohms, the original gauge resistance is 120 ohms, and the strain is 0.002. Using the formula:

\[ GF = \left( \frac{0.5}{120} \right) / 0.002 \]

We get:

\[ GF = 2.08 \]

So, the gauge factor (\( GF \)) is 2.08.