This simple pendulum is created to show the fundamental experiments concerning pendulum and its laws. This simple pendulum kit allows students to learn & determine pendulum period (T) and to understand which parameters have an impact on the oscillation frequencies. Complete kit  includes  a boss head so it can be mounted on a retort rod and base clamping rod , ring, two pendulum of same diameter with different volumes. Vashishat Digital Oscillation Counter with attached Photogate sensor allows to measure the period of oscillation measurement of time intervals, revolutions per second. Operating voltage 230Volts, AC 50Hz.