ABSTRACT
Sensors are devices that measure physical quantities of the environment around them and convert these quantities into electrical/optical/sound-wave/mechanical signals, which can be read or viewed by an observer or by an instrument. The physical quantity can be a movement of a human body or movement of an object or environmental temperature or wind velocity or gun shots. The signal can be in the form of electrical or mechanical or sound. In general, various sensor devices are typically used by wireless sensor networks (WSNs) and Mobile ad hoc networks (MANETs) that construct a cyber-physical system (CPS) for monitoring the physical quantities specied by a user. This section denes sensor networks and their uses in CPSs.
