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Thermo-Scientific Orion 5-Star Multi-parameter Benchtop Meters (Two Units Funded 2008)The TAL facility houses two Thermo-Scientific Orion 5-Star Multi-parameter Benchtop meters.. These meters are capable of simultaneously measuring pH, ORP (Oxidation-Reduction Potential), Conductivity, DO (Dissolved Oxygen), Temperature, TDS (Total Dissolved Solids), and ISE (Ion Specific Electrode) in aqueous solutions. In addition, the meters are connected to a PC so that data can be stored in electronic format and retrieved via accompanying software. The meters are especially valuable for students in Chemistry courses that require multi-parameter testing of solutions such as surface waters.