Specifications: Specific Gravity Range: 1.000 to 1.216 Specific Gravity, Specific Gravity Resolution: 0.001 Specific Gravity, Specific Gravity Accuracy: ±0.002 Specific Gravity, Sodium Chloride Range: 0 to 28 g/100 g; 0 to 34 g/100 mL; 0 to 26 °Baume, Sodium Chloride Resolution: 0.1 g/100 g; 0.1 g/100 mL; 0.1 °Baume, Sodium Chloride Accuracy: ±0.2 g/100 g; ±0.2 g/100 mL; ±0.2 °Baume, Temperature Range: 0 to 80°C (32 to 176°F), Temperature Resolution: 0.1°C (0.1°F), Temperature Accuracy: ±0.3 °C (±0.5 °F), Temperature Compensation: automatic between 0 and 40°C (32 to 104°F), Automatic Shut-Off: after three minutes of inactivity, Battery Type/Life: 9V / approximately 5000 readings, Refractometer Light Source: Yellow LED, Minimum Sample Volume: 100 µL (to cover prism totally), Sample Cell: stainless steel ring and flint glass prism, Measurement Time: approximately 1.5 seconds.