The **Professional Glass Hydrometer** (part number 36450) is a precision instrument essential for the inspection and diagnosis of lead-acid batteries. It measures the electrolyte density to instantly determine the state of charge and the health condition of each individual cell.
The hydrometer features a clear, easy-to-read graduated scale: Measurement Units: Scale in GRADI Baumé and Specific Gravity (Relative Density). Visual Indicator: The scale is divided into three colored sectors, which instantly indicate the cell condition:
- **Green (Good):** Cell in excellent condition/full charge.
- **Yellow (Medium):** Partial charge or cautionary state.
- **Red (Bad):** Deep discharge or faulty cell.