Pressure is a very important quantity in various industries and therefore accurate and fast measurement is very important, so that to determine the type of instrumentation equipment is usually one of the items that is always in question, system pressure and therefore The maximum pressure is tolerable. Therefore, we always need equipment to be able to report system pressure according to environmental conditions and related standards. An electric (digital) barometer is a tool that has the ability to measure pressure digitally with low response time and high accuracy. Can show the measured pressure on the screen. Electric sphygmomanometers are used in various industries, small and large, laboratories, heating systems, ventilation, hospitals, etc. Some sphygmomanometers have the ability to measure and compare the pressure of two or more points, which are called differential sphygmomanometers or differential sphygmomanometers.
Digital sphygmomanometers require special sensors to measure this quantity. These pressure sensors can be classified based on the measuring range, operating temperature range and, most importantly, the type of pressure..
Types of barometers
According to the type of pressure, barometers are classified into the following categories:
Absolute pressure sensor (Absolute pressure sensor)
This pressure sensor is one point relative to a complete vacuum, ie zeropsiMeasures. Atmospheric pressure (KPa101.325 (Or(psi14.7) at sea level relative to vacuum.
Vacuum pressure sensor (Vacuum pressure sensor)
This sensor measures pressure below atmospheric pressure at specific points.The vacuum sensor reference varies in the industry, which may lead to errors. For example, pressure relative to atmospheric pressure (such as measuring negative gauge pressure) and pressure relative to vacuum pressure.
Gauge pressure sensor
This sensor has different uses because it is calibrated to measure the pressure of one point relative to the atmospheric pressure of another at another point. Tire pressure gauge is an example of a gauge pressure gauge. When the tire pressure gauge shows zero psi, the pressure inside the tire is 14.7 psi, which is the pressure of one atmosphere
Differential pressure sensor
This sensor measures the pressure difference between two or more points, which are introduced as inputs
For example, these sensors are used to measure the pressure drop in the oil filter, as well as to measure the flow or level in the tanks
Sealed pressure sensor
This sensor acts like a pressure gauge sensor, except that it is calibrated by the manufacturer to measure the pressure relative to sea level pressure (about 14.7 Psi) during manufacture.
These sensors are used to measure pressure in constant temperature and high pressure conditions, for example in high pressure conditions that the diaphragm can not withstand, the use of this sensor is common.
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