Rakshitha M
5th Sem B.Sc.[PME]
Sensor is a device which detects the changes in the environment and gives information to the electrical components.
Classification of sensor
Analog sensors
- Accelerometers
- Light sensors
- Sound sensors
- Pressure sensors
- Analog temperature sensors
Digital sensors
- Switches
- Infrared detectors
- Digital accelerometers
- Digital temperature sensors
Types of sensors
- Temperature Sensor: It is used in building chemical process plants, engines, appliances, computers and many other that require temperature monitoring.
- Accelerometer: It is used to measure along one axis and insensitive to orthogonal directions.
- Light Sensor: It is composed of photo conductors such as photo resistors, photo diode or a photo transistors.
- Magnetic field: It is used for power steering security or current measurements.
- Ultrasonic sensors: It measures distance by sound waves.
- Co2: It is the measurement of co2 used in indoor air quality.
Working of sensor
The specific inputs such as light, heat, moisture, motion, pressure or any one of the other environmental change can be sensed by the sensor and the output is converted to human readable display at the sensor location.
Quantities that can be sensed
- Motion
- Force
- Pressure
- Flow
- Velocity and acceleration
- Sound
- Moisture
- Light
- Radiation
- Temperature
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