For the measurement of very small charges (of the order of UC) and current (of the order of UA). Ballistic Galvanometer is in a sturdy, metal case with self-contained lamp and scale. Lock/Unlock, zero adjustment knobs at front. Light spot on the front scale is adjustable by a knob provided at the back. The scale is graduated in mm from 0-20cm (left zero) or 10-0-10cm (center zero), as required. Three leveling screws in the base and a spirit level at the top of the instrument are provided for adjusting the level of the instrument. Coil resistance is 200amp, with a sensitive greater than 60mm/UC of charge, and a time period of 2-3 seconds.