# Strain Gauge

Model deformation sensor

Sensors

## Description

The Strain Gauge block represents a sensor that generates a change in resistance as a function of strain using the following equation:

`$\frac{\Delta R}{R}=K\epsilon$`

where:

• ΔR/R is the fractional change in resistance.

• $\epsilon$ is the strain at port B.

• K is the Gauge factor parameter value.

## Dialog Box and Parameters

Gauge resistance

The unstressed gauge resistance. The default value is `100` Ω.

Gauge factor

The ratio K of the fractional change in resistance to the fractional change in length. The default value is `2`.

## Ports

The block has the following ports:

`B`

Strain input

`+`

Positive electrical port

`-`

Negative electrical port