Abstract: Devices, systems, methods and products for measuring concentrations of analytes in-situ, including concentrations of ions, proteins, DNA, and, RNA in a variety of mediums including solutions, suspensions, soils, slurries, biological fluids and living organic material such as agricultural crops. Embodiments of the disclosed inventions measure analyte concentration in-situ without clogging reference electrodes, leaking reference solution or having to dilute a medium prior to taking the analyte measurements. In-situ analyte measurements are made without clogging reference electrodes using a combination of solid-state sensors connected to a transducer, a reference electrode enclosed by a non-porous enclosure and a metallic plug extending from the interior cavity of the non-porous enclosure outwardly exterior to the non-porous enclosure, contacting the medium being measured.

Abstract: Devices, systems, methods and products for measuring concentrations of analytes in-situ, including concentrations of ions, proteins, DNA, and, RNA in a variety of mediums including solutions, suspensions, soils, slurries, biological fluids and living organic material such as agricultural crops. Embodiments of the disclosed inventions measure analyte concentration in-situ without clogging reference electrodes, leaking reference solution or having to dilute a medium prior to taking the analyte measurements. In-situ analyte measurements are made without clogging reference electrodes using a combination of solid-state sensors connected to a transducer, a reference electrode enclosed by a non-porous enclosure and a metallic plug extending from the interior cavity of the non-porous enclosure outwardly exterior to the non-porous enclosure, contacting the medium being measured.