Sensors are sophisticated devices that are frequently used to detect and respond to electrical or optical signals. A Sensor converts the physical parameter (for example: temperature, blood pressure, humidity, speed, etc.) into a signal which can be measured electrically.
Classification of Sensors based on property is given below:
· Temperature Sensor – Thermistors, thermocouples, RTD’s, IC and many more.
· Pressure Sensor – Fibre optic, vacuum, elastic liquid based manometers, LVDT, electronic.
· Flow Sensor – Electromagnetic, differential pressure, positional displacement, thermal mass, etc.
· Level Sensor – Differential pressure, ultrasonic radio frequency, radar, thermal displacement, etc.
· Proximity and displacement Sensor – LVDT, photoelectric, capacitive, magnetic, ultrasonic.
· Biosensors – Resonant mirror, electrochemical, surface Plasmon resonance, Light addressable potentio-metric.
· Image Sensor – Charge coupled devices, CMOS
· Gas and chemical Sensor – Semiconductor, Infrared, Conductance, Electrochemical.
· Acceleration – Gyroscopes, Accelerometers.
· Others – Moisture, humidity, mass, force, viscosity.
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