Features:_x000D_ 1. It displays the salinity value precisely, compact size and light weight, easy and portable to carry, convenient to use._x000D_ 2. The pen type salinity meter is a precision instrument for testing the salinity value of a solution._x000D_ 3. Suitable for saltwater, swimming pool, aquaculture, aquarium (seawater) and pond, food processing and health care products industry._x000D_ 4. It adopts large screen LCD, PPT standard unit display, power display, power data protection function, automatic temperature compensation, dustproof and waterproof functions._x000D_ 5. Its full-featured performance, easy operation and replaceable electrodes make it the best choice for rapid, accurate salinity testing in laboratories, sites and schools._x000D_ _x000D_ Specification:_x000D_ Item Type: Salinity Meter_x000D_ Material: Plastic _x000D_ Measure Range: 0-199.0_x000D_ Resolution: 35ppt_x000D_ Accuracy: 2% Full Scale_x000D_ ATC: 0-60C_x000D_ Power Supply: 4 x 1.5V (LR44) (Not Included)_x000D_ Size: Approx. 172 x 26 x 26mm / 6.77 x 1 x 1in_x000D_ Weight: Approx. 145g / 5.11oz _x000D_ _x000D_ Package List:_x000D_ 1 x Salinity Meter_x000D_ 1 x Instruction_x000D_ 1 x Screw _x000D_ _x000D_ _x000D_ _x000D_ Note:_x000D_ 1. Please gently stir the electrode during operation. Do not let air bubbles bubble on the electrode._x000D_ 2. To ensure the measurement accuracy, please do not re-calibrate, it is optional._x000D_ 3. If there are abnormal phenomena, such as high deviation measured, flickering measurement value, no zeroing, etc., please immerse and clean the electrode with ethanol.