The Thermo Scientific® Orion™ AQ4000 is an advanced multiwavelength colorimeter that simplifies the measurement process and ensures accurate results. Easy-to-use controls; bright, clear LED screen. Built-in routines simplify setup and measurement. Rugged, field-proven IP67 waterproof design. Selectable display units: concentration, absorbance or percent transmittance. You can store up to 189 pre-programmed methods, and easily download new tests via the Web; it's also easy to create your own custom methods with up to 5 data points and customized calibration. The unit records up to 100 data points in the field with a time and date stamp, for later downloading to a printer or computer. Advanced Auto-ID™ feature automatically identifies the species to be measured, selects the method, wavelength, and reaction time. You don't even have to push a button! Auto-ID works with our exclusive Auto-Test Ampoules - pre-measured liquid reagent ampoules specially designed for the Orion AQ4000. The meter can also be used with Orion tablets, Orion powders and Orion COD reagents. Accepts 13, 16, and 24 mm round cuvettes. See W2530 for reagents.