At the moment, most dynamometer torque sensors use either strain gauges or, in more advanced applications, magneto-elastic sensors to measure output torque. However, in recent years new sensors for torque measurement based on Surface Acoustic Wave (SAW) transducers have been developed that have potential uses in dynamometer applications. The sensors work by measuring changes in SAW properties across a substrate as the stress within the substrate varies. In its simplest form, a SAW...