Quick Answer: Hofmann Voltameter has three parallel tubes joined at the bottom, with a central filling funnel and two side tubes graduated 0-50 x 0.2 mL so the volume of gas in each can be measured.
Last updated: October 2026
Key Features
Three parallel tubes joined by a horizontal tube at the bottom
Central tube with funnel for filling with water
Side tubes graduated 0-50 x 0.2 mL
Open lower ends on side tubes take bungs holding electrodes
Jets with stopcocks at the top for collecting gas in test tubes
Clamps and support base sold separately
Technical Specifications
Specification
Value
Tubes
Three parallel, joined at bottom by horizontal tube
Side tube graduation
0-50 x 0.2 mL
Filling
Funnel on central tube
Gas outlets
Jets with stopcocks
Mounting
Retort rod, with clamps and support base (sold separately)
About This Product
Water is poured in through the central funnel and electrodes are fitted into the side tubes with bungs; when a current is passed, gas gathers at the top of each side tube and is read against the graduations. Opening the stopcocks releases each gas through its jet into a test tube, so the products of this Electrolysis apparatus can be tested separately.
Frequently Asked Questions
Q1. Are the clamps and support base included? No. Clamps and a support base are sold separately and are recommended so the unit can be mounted on a retort rod.
Q2. How is the gas volume measured? Each side tube is graduated 0-50 x 0.2 mL, so the volume of gas in each can be read directly.
Q3. How is gas collected for testing? Jets with stopcocks at the top of the side tubes let the gas be collected in test tubes.
Our export customers include schools, colleges and dealers in Iceland, Brazil and Croatia.
