What is a Pressure Sensor

Pressure sensor is the most common industrial practice, a sensor, its widely used in various industrial control environment, involved in water conservancy and hydropower, railway transportation, intelligent buildings, production control, aerospace, military industry, petrochemical, oil, electric power, ships, machine tools, pipe, and many other industries, the following is a brief introduction some commonly used sensor principle and its application.There are also medical pressure sensors.Biao he (Shanghai) instrumentation co., LTD., is a collection of research and development, production, sales as one of the pressure sensor manufacturers, the company specializes in the development and production of sensors, transmitters, automation instrumentation, industrial control systems, but also according to customer needs to provide professional development and testing solutions.In order to ensure the effectiveness, standardization and process of our products and technical services, and to ensure the maximum customer satisfaction, we strictly follow the ISO9000 quality assurance system to achieve internal strict management procedures and flexible optimization of customer service level.

The main piezoelectric materials used in the piezoelectric sensor include quartz, sodium potassium tartrate and dihydrophosphate.Among them, quartz (silica) is a kind of natural crystal, in which piezoelectric effect is found. Within a certain temperature range, piezoelectric properties exist all the time, but after the temperature exceeds this range, the piezoelectric properties completely disappear (this high temperature is called “Curie point”).Because the electric field varies only slightly with stress (that is, the piezoelectric coefficient is low), quartz is gradually replaced by other piezoelectric crystals.Sodium potassium tartrate has high piezoelectric sensitivity and piezoelectric coefficient, but it can only be used in low temperature and humidity environment.Ammonium dihydrogen phosphate belongs to artificial crystal, relative density 1.80, melting point 190 ℃, can bear high temperature and high humidity, stable in the air.Room temperature (20 ℃) in the water solubility of 37.4 g, slightly soluble in ethanol, insoluble in acetone, so has been widely used.At present, piezoelectric effect is also applied to polycrystal, such as current piezoelectric ceramics, including barium titanate piezoelectric ceramics, PZT, niobate piezoelectric ceramics, lead magnesium niobate piezoelectric ceramics and so on.

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