Classification of sensors

Sensors can be classified based on various criteria such as:

• Physical principle: For example, optical, mechanical, magnetic, capacitive, and resistive.
  
  
• Measurement type: For example, temperature, pressure, humidity, and force.
  
  
• Output signal: For example, analogue, digital, and pulse.
  
  
• Operating environment: For example, temperature, pressure, and corrosive.
  
  
• Application: For example, automotive, medical, industrial, and consumer.
  
  
• Technology used: For example, MEMS (Micro-Electro-Mechanical Systems), NEMS (Nano-Electro-Mechanical Systems), and Infrared.