Comparing the effectiveness of a light sensor and a touch sensor
The light sensor will be able to cope better than the touch sensoras a counter, even if the speed of the conveyor is increased.
Sensors are devices that are used to measure or detect a specific response or movement and to convert this information into a signal that can be interpreted and processed by an observer, another instrument or a computer. A sensor can collect data and convert it by many means and methods. Sensors are actually transducers, devices that help to convert energy from one form into another.
There are many types of sensors that do not depend on electronics means to convert and interpret data. The thermometer is one such example. The expanding mercury in the thermometer will detect thermal energy. The kinetic energy in the mercury atoms will cause the mercury in the thermometer to expand or contract accordingly. The mercury level will rise up or down to indicate the temperature.
Modern day sensors can be found everywhere around us. Our cars have fuel gauges to detect petrol levels, thermostats to monitor engine temperatures, speedometers to show the speed, reverse sensors and car alarms. Sensors are also used to detect light, touch, temperature, proximity and are used in thousands of applications.