PR-68
These are used for the measurement of velocity and acceleration, using timing marks made on a moving paper tape by a vibrating striker.
Designed to operate on a 12V A.C. supply and uses the mains frequency as its timing standard.
The unit is housed in a moulded case including mounting flanges.
The top of the case caries a tape guide which incorporates a carbon paper disc support and an adjustable anvil for the striker point.
All moving parts are fully enclosed.
A pair of 4 mm sockets are provided on the side of the case for connection of the electrical supply.
It is supplied with a roll of self marking paper tape.
The paper tape=100m long and 9.5mm wide.
Carbon Paper Discs: 40mm in diameter with 3mm hole, cut from long life plastic film type carbon paper.
Thus, they help students to analyze the motion of objects in physics labs.