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=== Magnetoelastic Effects ===
These sensors use changes in [[Magnetic field|magnetic]] properties when stress by torque is given. The magnetoelastic principle enables non-contact torque measurement thus sensor lifespan and performance in harsh environments are raised.
=== Optical Sensing ===
Optical torque sensors utilize light-based techniques namely [[interferometry]] or [[Phase (waves)|phase shift]] measurements to detect torque. They provide high sensitivity, immunity to [[electromagnetic interference]], and minimal mechanical interference.
=== Piezoelectric Effects ===
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