Quick Answer:The Specific Gravity Bottle, also called a pycnometer, is a glass bottle with a capillary-bore ground stopper that holds an exact volume, for finding the density and specific gravity of liquids and solids; sizes are 10, 25, 50 and 100 ml.
Last updated: 18 October 2026
Key Features
Calibrated 'To Contain' (TC) a precise volume.
Ground-glass stopper with a central vertical capillary.
Excess liquid and air escape through the capillary, leaving no air pockets.
Capacities of 10, 25, 50 and 100 ml.
Technical Specifications
Specification
Value
Material
Borosilicate glass 3.3
Capacities
10, 25, 50, 100 ml
Stopper
Ground glass with central capillary
Calibration
To Contain (TC)
How It Is Used
The bottle is weighed empty, filled with the liquid and stoppered so the surplus escapes through the capillary, and weighed again; repeating with water gives the specific gravity from the two masses. Because the level always stops at the top of the capillary, the volume is far more repeatable than with a measuring cylinder.
Frequently Asked Questions
Why does the Specific Gravity Bottle stopper have a hole?
The capillary bore lets excess liquid and air escape as the stopper goes in, so the bottle always holds the same volume with no trapped bubbles.
Export orders for the Specific Gravity Bottle are accepted from schools, colleges and distributors in Liberia, Dominican Republic, Tunisia, Sudan and Lebanon.
For a quotation on the Specific Gravity Bottle, contact JLab India on +91-8569909696.
