In-Situ Inc. presents the Multi Parameter TROLL 9000E water quality sonde, specifically de-signed for long-term deployment applications. This sonde features a low-power management system with four D-sized alkaline batteries that can power the unit up to eight months - this extended deployment capability offers the advantage of less site disruption. The MP TROLL 9000E can simultaneously monitor up to nine water quality parameters, including temperature, pressure, level, depth, DO, conductivity, pH, ORP, TDS, resistivity, salinity, nitrate, chloride, ammonium, ammonia and turbidity. In-Situ Inc.