The electrodes, available separately, are mounted in rubber stopper for insertion into the open ends of the Voltameter limbs. Metal stand with mounts, for giving support to voltmeter glass unit. The glass unit has two connected limbs, integral with reservoir tube and funnel shaped bulb, with a stopcock at the top of each side limb. Used on 12 V D.C. supply. Pair of Carbon electrodes with brass terminals, fitted with rubber stoppers, approx 6mm dia x 100mm long in protection tubes. Pair of platinum electrodes fused in glass tubes, fitted with rubber stoppers and protection tubes.