Hoffman Voltameter With Electrodes
Product Code : LSK-CL-10242
Hoffman Voltameter With Electrodes (SKU LSK-CL-10242), also written Hofmann voltameter, is a glass electrolysis apparatus that splits water into hydrogen and oxygen and collects each gas in its own graduated limb. Chemistry and physics teachers use it to show the composition of water and, at senior level, to evaluate the electrochemical equivalent of hydrogen. Science Lab Supplies supplies the unit from Ambala, India to schools, colleges, tender contractors and distributors.
Specifications
The glass unit has two connected limbs of about 50 ml each, graduated 2–50 ml, joined to an integral reservoir tube with a funnel-shaped bulb. A stopcock tops each limb so the gases can be released and tested. Two carbon and two platinum electrodes are included, and the apparatus runs from a 12 V DC supply.
| Parameter | Value |
|---|---|
| SKU | LSK-CL-10242 |
| Limbs | Two, approx. 50 ml each, graduated 2–50 ml, stopcock on each |
| Reservoir | Integral tube with funnel-shaped bulb |
| Electrodes | 2 carbon, 2 platinum |
| Power required | 12 V DC supply |
| Electrolyte (user-supplied) | Water with molar sodium or potassium sulphate, or sulphuric acid |
| Packing | Protective packing case |
| Supplied by | Science Lab Supplies, Ambala, India |
Applications and Experiments for the Hoffman Voltameter
The voltameter is used to decompose water by electrolysis, show that hydrogen and oxygen form in a 2:1 volume ratio, and determine chemical composition by electrolysis. College classes also use the measured hydrogen volume to evaluate its electrochemical equivalent.
- Class 10 science (NCERT): electrolysis of water as a decomposition reaction.
- Class 12 chemistry: Faraday's laws of electrolysis.
- B.Sc. physics and chemistry: electrochemical equivalent of hydrogen.
Set the apparatus vertically in a clamp and stand and connect the terminals to a DC source. Sulphuric acid is corrosive and hydrogen is flammable, so work under supervision, wear eye protection and test the gases with a match only in small amounts.
Standard Scope of Supply
You receive the glass voltameter with its reservoir and stopcocks, plus two carbon and two platinum electrodes, in a well-protected packing case. The 12 V DC supply, clamp and stand, electrolyte chemicals and matches for gas testing are not included.
Packing, MOQ and Lead Time
Quotes are available for a single demonstration unit or for several lab stations. Each one from Science Lab Supplies gives the packing, delivery time and price for the number requested, and the stand and power supply can be added so the chemistry lab equipment in India arrives together.
Holding an Importer-Exporter Code as a registered exporter, Science Lab Supplies can ship to buyers in Zambia, Rwanda, South Africa, Qatar, Sri Lanka and Vietnam. Use the contact page for questions, the enquiry cart for a list of items, or the lab tender page for tender supply.
Frequently Asked Questions
Why are both carbon and platinum electrodes supplied?
The set includes two of each so the same voltameter can be run with either type. Platinum resists attack by the gases and electrolyte; carbon electrodes are a common alternative.
What power supply does it need?
A 12 V DC power supply connected to the electrode terminals. The supply is not part of the set and can be quoted with it.
Who supplies the Hoffman Voltameter With Electrodes?
Science Lab Supplies of Ambala, India supplies it, and can quote the voltameter with its stand, spare electrodes and a power supply for schools and colleges.
Is Hoffman the same as Hofmann voltameter?
Yes. Both spellings refer to the same three-limbed water electrolysis apparatus used in school and college laboratories.
Related Electrolysis Equipment
The voltameter needs a stand to hold it upright and a DC source to run it, and many labs keep spare electrodes. These four Chemistry Lab items complete the set-up and share one quotation.
- Hoffman Voltameter Stand — metal stand and clamp made for this apparatus.
- Electrode Platinum — replacement platinum foil electrodes.
- Electrode Rod Carbon Voltameter — spare carbon electrodes.
- Universal Power Supply or Power Driver — a DC source for the electrodes.
Browse the full Chemistry Lab range or all school lab equipment.
Last updated: 25 September 2026
