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 (L)115mm x (W)60mm x (H)70mm including mounting flanges. The top of the case carries a tape guide with carbon paper disc support and adjustable 'anvil' for the striker point.All moving parts are fully enclosed and electrical connection is via 4mm sockets.Spare Ticker Tape is available to purchase separately: B8R07097