Supplied in a pack of two, these push button switches are designed to be used in timing experiments such as reaction times, counting and measuring speed. Note: Vu+ data logger required. Digital Switches The push buttons are digital switch-type sensors that have two states, ON and OFF, these are push-to-make switches fitted with a red LED to give a visual indication of the switch's state. Practical Investigations Use the Vu+ Push Button Switches to investigate a number of scientific experiments such as: Reaction Time Game Counting objects (traffic, people, animals, etc.) Measure speed (cars, people, etc.) Record the differences in time taken to walk, run or hop over the same distance. Record the time taken by a vehicle to pass from one point to another Introducing the idea of the computer acting as a stopwatch e.g. starting and stopping timing. Introducing the fact that speed can be calculated directly if the distance between the start and finish line is used Specification Infrared source Peak at 880 nm Response time Less than 5 microseconds Timing resolution What's in the box 2 x Vu+ Push Switches 2 x Sensor Leads Product Manual