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Refractometer is a precision instrument which tests electrolyte density (battery charge) and freezing level of anti-freeze cooling and wiper fluid. Designed for density measuring: - wiper fluid freezing level, -40°C - 0°C; 5°C scale - cooling fluidfreezing level (G13 - propylene glycol, G11/12 - ethylene glycol), -50°C - 0°C; 1°C scale - electrolyte density, 1.10 - 1.40 kg/l, 0.01kg/l scale