This photometer system is designed to deliver accurate results by supporting the operator with each step he is doing: • Sample preparation: reduced handling steps, precise dosing • Sample analysis: automatic test recognition, expiration date check etc. • Documentation of results: versatile data management, control cards. With your daily routine of water analysis in mind the DR3900 spectrophotometer is optimised for safe processes and meaningful reports. Control-parameters like Ammonium, COD, Phosphate, Nitrogen and many others are easy to perform. The handling of tests and photometer is well designed to avoid any errors in your water analysis.