Note: 1. Don't calibrate instruments in the air. 2. If you don't use it for a long time, please calibrate the instrument before use. 3. After finished, clean the electrode with pure water. Specifications: Type: Water Quality Tester Material: ABS Quantity: 1 （Set accessories colors are random） Note: 1.Please allow 1-3cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!
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