Á¦Ç°Æ¯Â¡- Auto-ranging from 0 - 1000 NTU -Water proof and dustroof with IP67-rated housing that floats -Meets performance criteria as specified by ISO 7027 (DIN EN 27027) method -Compliant with ASTM D6855-03(EPA recognized) -Four point push-button calibration for full-range accuracy -Manual data memory and read function -Auto data logger functon (1387) -USB Interface (1387)