The HI7698594-4 is a combined conductivity and turbidity sensor for use with Hanna's HHI98594 Multiparameter Portable Meter. The sensor body is constructed of durable ABS and epoxy material. The 4-ring conductivity sensor contains AISI 316 stainless steel electrodes that are not subject to polarization or surface coating effects. By design, turbidity measurements conform to ISO 7027 standards using an optical technique to measure suspended particles in water.