The benefits of an Optical Torque Transducer (OTT) based on optical fibre Bragg sensors for applications in any
environment prone to electro-magnetic and temperature influences are outlined. By using an optical Rotation
Coupler (RC) the transducer avoids slip rings or telemetry systems. The OTT enables the measurement of both
torque and temperature free from electro-magnetic interference (EMI) in situations conventionally very difficult to
make these measurements. OTT torque measurements compare favorably with that of a dynamometer.