  We investigate a quadruple quantum dot setup that can be employed to sense
the temperature of an electrically isolated remote target reservoir. Such a
setup was conceived earlier by S\'anchez et. al. (New Journal of Physics, 19,
113040) as non-local thermodynamic engine and relies on the electrostatic
interaction between Coulomb-coupled quantum dots. The conjugation of
Coulomb-coupling and energy-filtering results in an overall change in
conductance with remote reservoir temperature. The performance of the
thermometer is then theoretically investigated using density matrix
formulation, and it is demonstrated that the quadruple quantum dot design
ensures a superior temperature sensitivity and noise robustness compared to a
simple thermometer consisting of two Coulomb-coupled quantum dots. In the end,
we investigate the regime of operation and comment on the ground state
configuration for optimal performance of the thermometer. The setup
investigated in this paper can be employed to construct highly efficient
non-local cryogenic thermometers.
