All bar electrodes are non-ferrous and consist of two tin electrodes placed 30mm apart in a watertight acrylic bar. The bar configuration permits easy electrode placement without disturbing electrode to electrode spacing. Bar electrodes are recommended for use when applying a stimulus, or recording a signal, during nerve conduction, somatosensory or muscle twitch recordings. When using bar electrodes for signal recording, a single ground lead (LEAD110 with EL503) is required. The leads (61cm long) terminate in standard Touchproof connectors, which connect to any 100C-series Biopotential amplifier or stimulus isolation adapter (STMISOC/D/E).