For qualitative and quantitative study of the electrolytic decomposition of electrolytes such as water, hydrochloric acid etc. Consists of two vertical 50mL, gas-collecting, graduated glass tubes with stopcocks at top and joined by a bridging tube to a reservoir. Works with matching graphite electrodes or platinum electrodes that may be fitted at the lower ends of the glass tubes. Packed in a styrofoam case. Mounted on a cast iron stand designed for safe clamping. Requires a 6V battery or low voltage D.C. power supply for operation.

Platinum electrodes and graphite electrodes are sold separately:
Platinum Electrode has part # 3155B
Graphite Electrodes have part # 3155C
A complete set requires one glass parts, one metal stand and a pair of electrodes.
Carbon electrodes last longer, however platinum electrodes are known for their resistance against different chemicals.