Types of sensors and their characteristics What are the types of sensors?


Dec 12,2022

There are many classification methods of sensors, usually the following four methods.

One. What are the types of sensors?

There are many classification methods of sensors, usually the following four methods.

1. According to the input physical quantity, it is divided into: displacement sensor, force sensor, speed sensor, temperature sensor and gas sensor.

2. According to the working principle, it is divided into: resistive type, inductive type, capacitive type and potential type.

3. According to the nature of the output signal, it can be divided into: analog sensor and digital sensor.

4. According to the principle of energy conversion, it is divided into: active sensor and passive sensor. Active sensors convert non-electrical energy into electrical energy, such as electromotive force, charge sensor
etc.; passive sensors do not function as energy conversion, but only convert the measured non-electric quantity into electrical parameters, such as resistive and inductive sensors

2. Encyclopedia of sensor types and characteristics

1. According to usage
Exciting and force sensitive sensors, position sensors, liquid level sensors, energy consumption sensors, speed sensors, acceleration sensors, radiation sensors, thermal sensors

2. According to principle
Vibration sensor, humidity sensor, magnetic sensor, gas sensor, vacuum sensor, biological sensor, etc.

3. According to its manufacturing process

Integrated Sensors: Manufactured using standard process technologies for producing silicon-based semiconductor integrated circuits. Usually, some circuits used for preliminary processing of the measured signal are also integrated
On the same - -chip.

Thin-film sensor: It is formed by depositing a thin film of the corresponding sensitive material on the dielectric substrate (substrate). When using a mixed process, it is also possible to convert part of the circuit
fabricated on this substrate.

Thick film sensor: It is made by coating the slurry of the corresponding material on the ceramic substrate, the substrate is usually made of Al2O3, and then undergoes heat treatment to form a thick film

Ceramic sensor: produced by standard ceramic process or some variant process (sol, gel, etc.).

4. According to the measurement object

Physical sensor: It is made by using the characteristics that some physical properties of the measured substance change significantly.

Chemical sensor: It is made of sensitive elements that can convert chemical quantities such as the composition and concentration of chemical substances into electrical quantities.

Biological sensors: sensors made of the characteristics of various organisms or biological substances to detect and identify chemical components in organisms.

5. According to its composition

Basic sensor: It is the most basic single conversion device.

Combined sensor: a sensor composed of a combination of different single conversion devices.

Applied sensor: It is a sensor composed of a basic sensor or a combined sensor combined with other mechanisms.

6. According to the form

According to the form of action, it can be divided into active and passive sensors.

Active sensor: there are action type and reaction type, this kind of sensor can send a certain detection signal to the measured object, and can detect the detection signal generated in the measured object

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