An efficient mass sensor based on exceptional points (EPs), engineered under a synthetic magnetism requirement, is proposed. The benchmark system consists of an electromechanical (optomechanical) system where an electric (optical) field is driving two mechanical resonators that are mechanically coupled through a phase-dependent phonon hopping. This phase induces a series of EPs once it matches the condition of π/2(2n + 1). For any perturbation of the system, the phase-matched condition is no longer satisfied, and this lifts the EP degeneracies, leading to a frequency splitting that scales as the square root of the perturbation strength, resulting in a giant sensitivity-factor enhancement. Owing to the set of EPs, our proposal allows a multiple-sensing scheme and performs better than its anti-PT-symmetric sensor counterpart. This work sheds light on platforms that can be used for mass-sensing purposes, opening up new opportunities in nanoparticle or pollutant detection and in water treatment.

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