– Professional battery hydrometer tester – 1.150/1.325 relative density (specific gravity) @ 77°f/77°f – Contains 30/120°f safety blue thermometer with corrections. – Includes a durable rubber bulb and a flexible tip for accessing hard to reach cells. – Accurate and easy to use – RED Discharged – WHITE Low Charge – GREEN Fully Charged – The battery cell to be tested must have enough solution to allow the float to rise freely – It is not possible to obtain an accurate reading if water has recently been added to the cell – Wash the hydrometer thoroughly with clean water after use.
