Features: OOTDTY new and high quality Widely Applications, it can used for water quality detection ,liquor marking industry ,environmental for protection, scientific research, industry and sewage disposal. LED display screen with backlight, you can easily read figures druing day and night. Unique positioning structure and high optical system can effectively ensure the accuracy and repeatability of measured values. Simple operation and suitable measurement with a cost performance ratio, more suitable for use in all walks of life. The instrument is calibrated by turbidity standard solution , and NTU is used as turbidity measurement unit, high accuracy Specifications: Material: ABS Size: 210X75X70mm/8.3X3.0X2.8 inches Plug: US Package Includes: 1x Turbidimeter 1x Power Cable 1x Glass Test Tube 1x Storage Box Note: Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item.