Quick Answer: The Hoffman Voltameter is a borosilicate glass 3.3 apparatus for electrolysis of water, used to collect and measure the hydrogen and oxygen given off. It has PTFE or ground-glass stopcocks, detachable platinum or carbon electrodes and a powder-coated cast iron base.
Last updated: October 2026
Key Features
Borosilicate glass 3.3 construction
Stopcocks with PTFE or ground-glass keys
Detachable platinum or carbon electrodes in acid-resistant mounts
Permanent amber or white ceramic enamel graduations
Cast iron base with corrosion-resistant powder coating
Technical Specifications
Specification
Value
Glass
Borosilicate glass 3.3
Stopcocks
PTFE or ground-glass keys
Electrodes
Platinum or carbon, detachable, acid-resistant mounts
Graduations
Amber / white ceramic enamel
Base
Cast iron, powder coated
HS code
7017.20
About This Product
Passing current through acidified water in the voltameter releases hydrogen at one electrode and oxygen at the other, and the graduated limbs let students compare the volumes collected. It is used to demonstrate Faraday’s laws of electrolysis and to relate the gas evolved to the charge passed.
Frequently Asked Questions
Which electrodes can be used with this Hoffman Voltameter?
It takes detachable platinum or carbon electrodes held in acid-resistant mounts.
