Hare's Apparatus
Product Code : SCL-PLE-11724
Quick Answer: The Hare’s Apparatus compares the densities of two liquids by common suction, using a three-limbed inverted U-tube of borosilicate 3.3 glass with two millimetre scales, a pinch-cock valve and a weighted levelling base.
Last updated: 18 October 2026
Key Features
- Three-limbed inverted U-tube with a central suction limb.
- Clear borosilicate 3.3 glass.
- Two millimetre scales for reading both liquid columns.
- Tubing with a pinch-cock to hold the suction.
- Weighted base with levelling adjustment keeps the limbs vertical.
Technical Specifications
| Specification | Value |
|---|---|
| Tube | Three-limbed inverted U-tube, central suction |
| Glass | Borosilicate 3.3 |
| Scales | Two millimetre scales |
| Valve | Tubing with pinch-cock |
| Base | Weighted, with levelling adjustment |
How It Is Used
The two side limbs dip into beakers of water and the test liquid. Air is drawn out through the central limb and the pinch-cock closed, so both liquids rise under the same reduced pressure. The heights reached are inversely proportional to the densities, so their ratio gives the relative density of the test liquid.
Frequently Asked Questions
How does Hare’s Apparatus compare liquid densities?
Both liquids are raised by the same suction, so the column heights are inversely proportional to their densities; comparing heights gives relative density.
Related Physics Lab Equipment
See the full physics lab equipment range, or these related density and pressure apparatus:
- Specific Gravity Bottle
- Manometer, glass, mounted. scale 80-0-80
- Archimedes Principle Kit
- Hydrometer Jar Round Base
- Viscosity Tube Model
For a quotation on the Hare's Apparatus, contact JLab India on +91-8569909696.
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