Dataron Instruments provides the `Data Bank` Hand-Held Water Quality Meter with optional GPS. It Interprets, Displays, Logs Data and even Calibrates sensors. Used for Turbidity and Suspended Solids - or - Chlorophyll a, Rhodamine WT, or CDOM... all without changing a cable. Easy change cables to become other instruments. This is one tough watertight field instrument. Includes software.