Features include auto-ranging and min-max recall. Reads turbidity values of aqueous solutions Protective chamber with lid to prevent debris from entering Maximum and Minimum values Portable design for use in the field or laboratory Data Hold Function Optional DC adapter for field use Zero adjustment feature for low turbidity solutions Dimensions: 6½ x 3 x 2½ 165 x 75 x 65 mmWeight: 5 lbs 2268 g Specifications Unit of Measure: Range: Resolution: Accuracy: Turbidity 0 to 49.