Description
An SG bottle stands for Specific Gravity bottle (also called a pycnometer) used in laboratory work.
It is a calibrated glass bottle used to find the specific gravity (density) of liquids (and sometimes solids) very accurately.
Simple description:
An SG bottle is a small borosilicate glass bottle with a precise volume and a special stopper with a capillary hole, which allows excess liquid to escape so the volume inside remains exact.
Main purpose:
- To measure density / specific gravity of liquids
- Used in chemistry, pharmaceuticals, and material testing labs
Structure:
- Made of borosilicate glass
- Has a ground-glass stopper
- Stopper has a capillary channel
- Usually comes in small sizes like 10 mL, 25 mL, 50 mL
Principle:
It works on the principle of comparing:
- weight of empty bottle
- weight of bottle filled with liquid
- known fixed volume of bottle
Uses:
- Quality control in industries
- Determining purity of liquids
- Research and chemical analysis
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