Quick Answer: The Hoffmanns Voltameter is used to electrolyse water and show its chemical composition by volume and the electrochemical equivalent of hydrogen. It comes with one pair of platinum electrodes.
Last updated: October 2026
Key Features
Two outer limbs, each graduated 50 cm³ x 2 cm³
Stopcocks at the apex of the outer tubes; 200 cm³ reservoir at the apex of the inner tube
Overall height 720 mm, width 87 mm
One pair of platinum electrodes mounted in rubber stoppers
Supplied without clamps or stand
Spare mounted platinum and carbon electrodes available separately
Technical Specifications
Specification
Value
Outer limbs
Graduated 50 cm³ x 2 cm³
Overall height
720 mm
Width
87 mm
Reservoir capacity
200 cm³
Electrodes
One pair of platinum electrodes
Clamps and stand
Supplied without clamps or stand
About This Product
When acidified water is electrolysed, the gases produced are read off on the graduated outer limbs, so the composition of water by volume can be shown. The platinum electrodes suit acidified water, but carbon electrodes must be used for ammonia solutions, hydrochloric acid or any other chloride-containing solution.
Frequently Asked Questions
Q1. When must carbon electrodes be used instead of platinum? Carbon electrodes must be used for ammonia solutions, hydrochloric acid and any other chloride-containing solution. Platinum electrodes are used for acidified water.
Q2. Are a stand and clamps included? No. The voltameter is supplied without clamps or stand.
