Body    : The moving coil system is housed in aluminum case with removable front sliding cover with three leveling screws

                A rectangular coil is suspended with the help of a fine phosphor bronze  suspension wire and moves in a strong magnetic field generated by a                 permanent magnet.

Mirror : The coil carries a 10 mm circular concave mirror of 100 cm F.L. A zero adjuster  :  is provided to set the spot of light on scale.  A simple device is                 provided to clamp the coil during transit. 

Ohms :     100 or 500Ohms (Time period approx. 8-10 sec.)