M-1576 ESAW 'g' by Free Fall Method 

It has an electronic timer unit on which there are four 4 mm sockets, two for gates and another two for solenoid and a toggle switch for release and catch the ball. The other unit consists of a heavy retort stand. The said retort stand carries two baseboards. Out of them, one is solenoid holding base of size 149x97x113 mm providing two banana sockets of 4mm. When the toggle switch is on 'Catch' position, the current is flowing in the solenoid and it produces a magnetic field and a steel ball makes an attraction towards it. Another base connected to the retort stand is of steel base on which the ball is dropped having a base of size 115x60x2mm. As well as the switch is positioned on release, their, breaking the contact between solenoid and ball is dropped on the steel plate, and there is some time displayed on the timer. Supplied with a steel ball of 12mm & 18mm diameter.