Specific Gravity Bottle / Pycnometer

This specific gravity bottle, also known as a pycnometer, is laboratory glassware for determining liquid density or relative density using a suitable weighing method. Select the capacity required for your sample and procedure.

Use the bottle alongside an appropriate balance and temperature-controlled method to compare measured masses. Its stoppered design provides a defined filling arrangement for repeatable preparation when used correctly.

Product details

• Material: borosilicate glass, as listed.
• Available capacities: 10 mL, 25 mL, 50 mL and 100 mL.
• Closure: ground-glass stopper with a capillary hole, as listed.
• Purpose: liquid density and specific gravity measurements.

Applications

Compatible density experiments, teaching practicals and laboratory quality-control procedures. Concentration estimates require a validated relationship between density and the substance being tested; the bottle does not directly measure concentration.

Measurement specifications

Nominal capacity does not establish calibrated volume or measurement accuracy. Confirm volume tolerance, reference temperature, stopper fit and any calibration documentation before analytical use. Results depend on the balance, sample temperature, filling technique and method.

Care and handling

Check chemical compatibility, inspect for chips or cracks and clean according to the supplier's instructions. Keep the bottle and its fitted stopper together. Avoid sudden temperature changes and do not assume pressure or vacuum suitability.