Classification
Classification of microsensors:
- According to whether there is energy supply, it can be divided into active microsensors (for example: piezoelectric ) And passive microsensors (for example: fluorescence) 
- According to the different objects that microsensors can measure, they can be divided into the following nine categories: 
- Mechanical micro-sensors: micro-sensors used to measure force, deformation, displacement and speed. 
- Electrical micro-sensors: micro-sensors used to measure current, potential, resistance and capacitance. 
- Magnetic micro-sensor: a micro-sensor used to measure magnetic field size, magnetic field polarity, magnetic flux and permeability. 
- Thermal micro-sensor: a micro-sensor used to measure temperature, specific heat capacity, thermal conductivity and heat capacity. 
- Acoustic micro-sensor: Micro-sensor used for measuring amplitude, phase, polarization and sound spectrum. 
- Optical micro-sensor: micro-sensor used for measuring spectrum, wave speed, amplitude and phase. 
- Radiation micro-sensor: micro-sensor for X-ray, ultraviolet, microwave and radio wave measurement. 
- Chemical micro-sensor: Micro-sensor used to measure composition, concentration, humidity and pH value. 
- Biological microsensors: microsensors for hormone, antigen, sugar and biomass measurement. 

