  A rotation sensor is one of the key elements of inertial navigation systems
and compliments most cellphone sensor sets used for various applications.
Currently, inexpensive and efficient solutions are mechanoelectronic devices,
which nevertheless lack long-term stability. Realization of rotation sensors
based on spins of fundamental particles may become a drift-free alternative to
such devices. Here, we carry out a proof-of-concept experiment, demonstrating
rotation measurements on a rotating setup utilizing nuclear spins of an
ensemble of NV centers as a sensing element with no stationary reference. The
measurement is verified by a commercially available MEMS gyroscope.
