Item Type: Salinity Tester Material: ABS Resin Measuring Temperature: 0-80°C (liquid temperature), 10-40°C (room temperature) Measurement Accuracy: 0.2% Measuring Range: 0-1.5% Battery: 3 x LR44 1.5V button battery (battery not included) How to Use: 1. Check whether the salt tester probe is clean. If it is not, please clean it with a neutral detergent. 2. Put the test object into a container, and it must have a certain height. 3. Press the ON switch of the salt tester and watch the Power indicator light turn green. If it does not light, it means the battery voltage is too low, and a new battery needs to be replaced. 4. Insert the probe of the salt tester into the solution at least 2cm deep and test it at a distance of at least 1cm from the container wall. After the display stabilizes, read the final value indicated by the red light; this is the detected value. 5. After the test, clean the probe part of the salt tester with a neutral detergent.