  The sensitivity to New Physics of a low threshold scintillating argon bubble
chamber measuring coherent elastic neutrino-nucleus scattering in reactors is
reported. Namely, light scalar mediators, sterile neutrino oscillations,
unitarity violation, and non-standard interactions are studied. The results
indicate that this detector could be able to set stronger constraints than
current limits set by the recent COHERENT measurements. Considering the best
scenario, a 100 kg detector located 30 m from a 2000 MW$_{th}$ reactor, a
sterile neutrino search would cover most of the space parameter allowed from
the reactor anti-neutrino anomaly fit. Unitarity violation studies could set
constraints on $\alpha_{11}$ more stringent than the current oscillation
experiments fit. A low threshold argon detector with very low backgrounds has
the potential to explore New Physics in different scenarios and set competitive
constraints.
