What is a Sensor? Classification of Sensors. Different Types of Sensors. Applications of Sensors. IR Sensor (Infrared Sensor). Temperature & Thermocouple Sensors. Proximity Sensor. Ultrasonic Sensor. Accelerometers & Gyroscope Sensor. Pressure Sensor. Hall Effect Sensor. Load cell. Light Sensor. Active Sensors. Passive Sensors. Analog and Digital Sensors.