Features: Designed to meet ISO 7027 | NTU ( Nephelometric Turbility Unit ) measuring unit | Wide and auto measurement range : 0 to 1,000 NTU | High Resolution: High resolution : 0.01 NTU/1 NTU | The unique optics structure, enables the instrument to read low value of turbility to the high level up to 1,000 NTU | Four operation buttons and three calibration points, easy operation | Jumbo LCD, easy readout | Microprocessor circuit assures maximum possible accuracy, provides special functions and features | Three point push button calibration, easy operation | Battery operated for field and on-site testing convenience | Data hold function for freezing the desired value on display | Records Maximum and Minimum readings with Recall | Heavy duty & compact housing with hard carrying case, designed for easy carry out & operation | Auto shut off is available to save battery life.