A Strain Gauge Amplifier is an instrumentation device that senses a small value of voltage and increases its magnitude to a detectable range. It uses the change in electrical resistance to quantify the amount of strain caused by an external force or pressure. A Strain gauge is a sensor whose resistance varies with applied force that converts quantities like force, pressure, tension, weight, etc., into a change in electrical resistance which can then be measured externally.

The instrumental amplifier, INA111 is a high-speed, FET-input instrumentation amplifier offering excellent performance.

The INA128 is a  low-power, general-purpose instrumentation amplifier offering excellent accuracy.

The OPA227 series operational amplifiers combine low noise and wide bandwidth with high precision to make them the ideal choice for applications requiring both AC and precision DC performance. The trimmer potentiometer can be adjusted to nullify the DC offset in the output signal under static conditions.

The preferred gain setting is x100, which is obtained by connecting a resistor of 500Ω  between pin 1 and pin 8 of the OP-Amp.