Description Part Number Electrical Supply Dimensions Mass	Photo Timing Gate IPC-3210-T 9V Battery PP3 type Each case: 55x110x25 Rod: 120x12 (dia) 0.25kg
	For use as a light operated timing gate. Comprises photodetector and light source each housed in a robust ABS case spaced 40mm apart on a plastic rod. Light source housing has battery compartment and on/off switch. Photodetector housing is fitted with a pair of 4mm sockets to allow connection to electronic timers. When the timing gate is switched on it creates a short circuit between the two output sockets, this then becomes an open circuit each time the light beam is interrupted. Consequently the timing gate can be used as a remote switching device in a wide range of dynamics experiments.			Instruction leaflet