Abstract A multi spiral split ring resonator based sensor is proposed for the characterization of the dielectric properties of a water ethanol mixture. The use of a narrowed microstrip line to excite the multi spiral resonator allows enhancement of excitation current and increase the sensitivity of the sensing area. Good agreement will be presented between theoretical and measured electrical parameters of the resonator in a wide frequency range from 2 to 5 GHz. The proposed sensor shows high sensitivity, miniature size, and affordable cost and above all laboratory-on-chip compatibility important for a large-scale production.