Types of sensors for iot applications for SY

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1. Unit-II Hardware for IoT Definition , Types of Sensors, Types of Actuators, Examples and Working, RFID Principles and components, Wireless Sensor Networks: History and Context, The node, Connecting nodes, Networking Nodes, WSN and IoT .

2. Sensors The four main types of sensors are active, passive, analog , and digital.  Active sensors: Require an external power source to function Passive sensors: Passive sensors generate their own electric signal.  Analog sensors:   Produce a continuous output signal or measurement Digital sensors:   A type of sensor that can be used in addition to analog sensors Examples of sensors 

3. Proximity sensors : Detect the presence or absence of objects without physical contact Accelerometers : Detect changes in position, velocity, and vibration by sensing motion Gyroscopes : Sense changes in angular velocity Thermistors : Use electrical resistance to measure temperature Chemical sensors : Analyze changes in gas, odorant, ion, and biological substances Humidity sensors : Measure humidity

4. Light sensors : Detect visible light Motion sensors : Detect motion Sensors can be used in many applications, including process monitoring and control, object counting, assembly lines, pollution monitoring, airport security, and smart street light automation. 

5. Active Sensors Active sensors require an external power source to function. They provide the majority of the output power of the signal.  These sensors are classified into various types. Some of them are: Accelerometers Light sensors Sound sensors Pressure sensors Temperature sensors


6. Passive Sensors According to a study passive sensors generate their own electric signal. There is no requirement for any external power source. Hence, this sensor technology gathers data by detecting vibrations, light, radiation, heat, or other phenomena. Some examples of technologies that use passive sensors are: Photographic Thermal Electric field sensing Chemical Infrared Seismic

7. Wireless Sensor Networks Wireless Sensor Network, or WSN, is a network of RF transceivers, sensors, machine controllers, microcontrollers, and user interface devices with at least two nodes communicating by means of wireless transmissions.