Industrial sensors have many types, here are five main types:
Temperature sensor: refers to a sensor that can sense temperature and convert it into a usable output signal. The temperature sensor is the core part of the temperature measuring instrument, and there are many varieties. According to the measurement method, it can be divided into two categories: a contact type and a non-contact type. According to the characteristics of sensor materials and electronic components, it can be divided into two types: thermal resistance and thermocouple.
The temperature sensor is the earliest developed and most widely used type of sensor. The market share of temperature sensors greatly exceeds that of other sensors. From the beginning of the 17th century, people began to use temperature for measurement. With the support of semiconductor technology, semiconductor thermocouple sensors, PN junction temperature sensors, and integrated temperature sensors have been developed this century.
Pressure sensor: It is the most commonly used sensor in industrial practice. It is widely used in various industrial automation environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automation, aerospace, military, petrochemical, oil wells, electric power, shipbuilding, machine tools, pipelines, and many other industries, the following briefly introduces some common sensor principles and applications. Another medical pressure sensor.
Pressure sensors are mainly used in fields such as booster cylinders, superchargers, gas-liquid booster cylinders, gas-liquid boosters, presses, compressors, air-conditioning, and refrigeration equipment.
Liquid level sensor: a pressure sensor that measures liquid level. The static pressure input type liquid level transmitter (level gauge) is based on the principle that the measured liquid static pressure is proportional to the height of the liquid. It adopts foreign advanced isolated diffused silicon sensitive elements or ceramic capacitor pressure-sensitive sensors, The voltage is converted into an electrical signal, and then after temperature compensation and linear correction, it is converted into a standard electrical signal.
Liquid level sensors are suitable for liquid level measurement of various media in petrochemical, metallurgical, electric power, pharmaceutical, water supply and drainage, environmental protection, and other systems and industries.
Water leak sensor: The water leak sensor is based on the principle of liquid conduction, using electrodes to detect whether there is water, and then using the sensor to convert it into a dry contact output. It is widely used in data centers, communication rooms, power stations, warehouses, archives, and other places that need to be waterproof.
Ultrasonic sensor: It is a sensor developed by using the characteristics of ultrasonic. Ultrasound is a mechanical wave with a higher vibration frequency than sound waves. It is generated by the vibration of the transducer wafer under the excitation of voltage. It has high frequency, short wavelength, small diffraction phenomenon, especially good directivity, which can be directed into rays. Dissemination and other characteristics. Ultrasonic waves have a great ability to penetrate liquids and solids, especially in solids that are opaque to sunlight. It can penetrate to a depth of tens of meters.