The Milwaukee Mi605 is a portable, microprocessor-based, dissolved oxygen meter with automatic calibration and temperature compensation (ATC) specifically designed for spot sampling applications. dissolved oxygen measurements can be displayed in parts per million (ppm=mg/L) or in % of saturation. The temperature is indicated in Celsius from 0 to 50°C with 0.1 resolution. The meter compensates salinity and altitude automatically after manual input. Calibration is very simple and fast: just expose the polarographic Dissolved Oxygen probe MA840, supplied with the instrument, to air and press the CAL button. No need for chemical solutions! A HOLD button allows the user to freeze the reading on the LCD. The low battery indicator and the easy to replace screw on cap membranes make the Mi605 a compact instrument and ideal for all applications: aquaculture, wastewater, environmental and educational.