The Unilab Fast Timer is a versatile portable instrument for timing brief events with two ranges: 1 to 999.9ms and 1 to 9999µs. The inputs can be controlled by light gates microphones or mechanical switches connected via 4mm sockets. Two sockets provide 0 and 5V for connection to sensors if required.The usual care is needed when using microphones to ensure that a repeatable sharp sound is obtained e.g. use a toffee hammer and steel slab to produce a sharp noise when measuring the speed of sound.Mass: 0.5kgDimensions: 170mm x 135mm x 45mmBattery: 9V PP3 Battery required (not included)Associated Products:B8L86356 - Unilab Master Light Gate with LeadsB8H27623 - Unilab Slave Light GateB8R05410 - 9V Battery (not included)The Unilab Fast Timer is also available to purchase as a bundle with our 'g' by Freefall Apparatus (B8R06831).