By use
Pressure and Force Sensitive Sensors, Position Sensors, Liquid Level Sensors, Energy Consumption Sensors, Speed Sensors, Accelerometer Sensors, Radiation Sensors, Thermal Sensors.
According to the principle
Vibration sensors, moisture sensors, magnetic sensors, gas sensors, vacuum sensors, biosensors, etc.
Press the output signal
Analog Sensor: Converts the measured non-electrical quantity into an analog electrical signal.
Digital sensor: Converts measured non-electrical quantities into digital output signals (both direct and indirect).
Digital sensor: The output (including direct or indirect conversion) that converts the measured signal into a frequency signal or a short-period signal.
Switching sensors: When a measured signal reaches a certain threshold, the sensor outputs a set low or high signal accordingly.
According to its manufacturing process
Integrated sensors are manufactured using standard process techniques for the production of silicon-based semiconductor integrated circuits. Often, part of the circuitry used for the initial processing of the signal under test is also integrated on the same chip.
Thin-film sensors are formed by depositing a thin film of the corresponding sensitive material on a dielectric substrate (substrate). In the case of a hybrid process, part of the circuit can also be fabricated on this substrate.
Thick film sensors are made by using a slurry of the corresponding material, coated on a ceramic substrate, which is usually made of Al2O3, and then heat treated to form the thick film.
Ceramic sensors are produced using standard ceramic processes or some variation of them (sols, gels, etc.).
After the appropriate preparatory operation, the formed components are sintered at high temperatures. There are many common characteristics between the two processes, thick film and ceramic sensors, and in some ways, the thick film process can be considered a variant of the ceramic process.
Each process technology has its own advantages and disadvantages. Due to the low capital investment required for research, development and production, as well as the high stability of the sensor parameters, ceramic and thick-film sensors make sense.
By Measurement Purpose
Physical sensors are made by taking advantage of the property that some of the physical properties of the substance being measured have changed significantly.
Chemical sensors are made of sensitive components that convert chemical quantities such as the composition and concentration of chemical substances into electrical quantities.
Biosensors are sensors that use the characteristics of various organisms or biological substances to detect and identify the chemical components of living organisms.
According to its composition
Basic Sensor: This is the most basic single transducer.
Combined sensor: A sensor that is composed of a combination of different individual transducers.
Application-oriented sensor: A sensor that is composed of a basic sensor or a combined sensor combined with other mechanisms.
By the form of action
According to the form of action, it can be divided into active and passive sensors.
The active sensor has a role type and a reaction type, this kind of sensor can send a certain detection signal to the measured object, can detect the change of the detection signal in the measured object, or form a signal by the detection signal in the measured object. The mode of detecting the change of the signal is called the action type, and the mode of detecting the response and forming the signal is called the reaction type. Radar and radio frequency range detectors are action-type examples, while photoacoustic effect analysis devices and laser analyzers are reaction-type examples.
Passive sensors only receive signals generated by the measured object itself, such as infrared radiation thermometers, infrared camera devices, etc.