Feature:   1. [High Accuracy] Accurate and intelligent instrument that measures turbidity with good linearity, accurate and reliable measurement results, and is easy to operate.     2. [LED Display] Turbidity meter with backlit LED display, which is clear, allowing you to easily read data during the night, to meet your various need.     3. [Durable Material] Made of high quality ABS material, which is durable, safe, stable performance, and can be used for a long time.     4. [Lightweight And Portable] The digital turbidity meter is exquisite in workmanship, lightweight, easy to carry, and can automatically shut down.     5. [Widely Application] Widely used in water works, water treatment plants, swimming pools, food and beverage industries, is an essential instrument for water laboratory.             Specification:            Item Type: Turbidimeter  Material: ABS  Product Size: Approx. 21 x 7.5 cm / 8.3 x 3 in  Measuring Principle: 90° Scattered light  Minimum Indication: (NTU) 0-200  Measuring Range: (NTU) 0.1  Calibration Point: 2  Indication Error: ±6%(±2%F.S)  Repeatability: ≤0.5%  Zero Drift: ±0.5%F.S  Power Supply: DC 1.5V 5 x AA alkaline dry batteries (Battery Not Included)  Parameters Voltage: US plug 100-240V 50/60Hz/0.1A/DC5V, automatic shutdown, AC and DC dual purpose  Weight: Approx. 1210g / 42.7oz                             Package List:   1 x Turbidimeter (Battery Not Included)     1 x Adapter       3 x Bottle       1 x Tube       1 x Storage Box       1 x Manual