A sensor, such as a hydrostatic water level sensor, includes a pressure sensor, a vent, a vent tube connecting the vent to the pressure sensor, and a fabric covering the vent. The pressure sensor is submersible in a liquid to be measured and the vent is configured to be outside the liquid. The fabric covers the vent and is both waterproof and breathable, e.g., Gore-Tex®. The vent may be integrated into an electrical connector for the pressure sensor, and the electrical connector may provide IP-65 protection. The sensor may be particularly be employed in an aeroponic plant growth system where the fabric prevents mist from blocking the vent and/or vent tube.
