Rotary torque has historically been difficult and expensive to measure. However, by using existing technology in a novel way, inexpensive transducers can be produced for situations where monitoring or control of drive mechanisms is required. Developed in conjunction with a UK government programme,TORQSENSE. E300 RWT (Rayleigh Wave Transducers) are the world's first low cost non-contact rotary torque transducers suitable for OEM applications.