English Lead Cited by user 132.183.13.50 on 23 Nov 2015 Lead is a chemical element in the carbon group with symbol Pb and atomic number 82.
English Sensor Cited by user 132.183.13.50 on 23 Nov 2015 In the broadest definition, a sensor is an object whose purpose is to detect events or changes in its environment, and then provide a corresponding output.