VEVOR Turbidity Meter, 0–1000 NTU Measuring Range, ISO 7027 Compliant, Portable Red Light Turbidimeter, Quick Reading, with Calibration Solutions, Sample Vials, and Carry Case, for Field and Plant User-Friendly Design Wide and Precise Range Color Display Quick Start, Easy Setup Versatile Use Complete Kit Included Modes: Normal Measurement | 10-Readings Auto-Average,Accuracy: ≤ ±2% of Reading + Stray Light ,Measurement Method: 90° Scattering ,Item Model Number: TN1000,Light Source: Infrared LED (860±30nm) ,Range: 0–1000 NTU (FNU),Power: 4xAA 1.5V LR6 Alkaline Batteries,Display: TFT Color Screen