  The polarisation dynamics of nuclear spins weakly coupled to an NV center is
highly sensitive to the parameters of the microwave control and the nuclear
Larmor frequency. What is commonly regarded as a challenge, we propose here as
a resource for quantum sensing. By varying a single experimental parameter in a
suitable set-up, i.e., the Rabi frequency of a continual microwave driving or
the nuclear Larmor frequency, we predict periodic reversals of the steady-state
polarisation of the nuclear spin. Crucially, interference between the
transverse and longitudinal dipolar interaction of electron and nuclear spins
results in remarkably sharp steady-state polarisation reversals of nuclear
spins within only a few tens of Hz change in the nuclear Larmor frequency. Our
method is particularly robust against imperfections such as decoherence of the
electron spin and the frequency resolution of the sensor is not limited by the
coherence time $T_2$ of the electron sensor.
