Half Bridge Circuit; Full Bridge Circuit - Microedge Instruments iLog Series User Manual

Half Bridge Circuit:

If the dummy gauge in the above figure is replaced by an active gauge, as shown below, the
resulting arrangement is called a half bridge. The half bridge has advantages for temperature
compensation and higher bridge sensitivity over the quarter bridge so that small strain levels can
be detected more accurately.

Full Bridge Circuit:

If four active gauges are employed in the circuit, the arrangement is called Full Bridge as shown
below. It is automatically temperature compensated when all four active gauges bonded on the
same material, and the highest sensitivity is obtained.
iLog Data Loggers User's Manual Page 19/63