Views: 16 Author: Site Editor Publish Time: 2025-05-07 Origin: Site
Smart pressure transducer and differential pressure transmitter, its direct measurement of pressure and differential pressure (the difference between the two pressures), but its indirect measurement of a wide range of applications, such as the measurement of the amount of pressure and liquid level in the equipment. Such as the measurement of atmospheric pressure container level when the installation of a pressure transmitter can be. In the pressurized container to measure the internal level, can be installed two, respectively, to measure the upper limit and lower limit level. The output signal of one of its decompression method can be planned to know the liquid level. At this time to choose the differential pressure transmitter is appropriate. In addition, for the container level and pressure value is unchanged, you can measure the density of the medium. Its measurement range can be 0 ~ 100MPa.
Differential pressure transmitter in addition to measuring the differential pressure value of the two measured pressure, it can also be used with a variety of throttling elements to measure the flow, can be directly measured by the level of the pressurized container and atmospheric pressure containers, as well as the level of pressure and negative pressure.
The basic principles of differential pressure transmitter and smart pressure transducer are different: Differential pressure transmitter calculates the differential pressure value by measuring the pressure at two different positions. It usually consists of two measuring chambers and a diaphragm. When the pressure acts on the diaphragm, the diaphragm deforms, making the pressure in the two measuring chambers change, thus realizing the measurement of differential pressure.
Pressure transmitters measure pressure directly at a single location. Its structure is relatively simple, consisting of a measuring chamber and a diaphragm. When the pressure acts on the diaphragm, the diaphragm deforms, thus measuring the value of the pressure.
Differential pressure transmitter has a wider range of applications: Because the differential pressure transmitter can measure and calculate the value of differential pressure, it is more suitable for occasions that require the measurement of flow, liquid level, gas density and other parameters.
For example, in the petrochemical industry, air conditioning systems and other fields, differential pressure transmitters are widely used in flow meters, liquid level meters and other equipment.
While pressure transmitters are more suitable for occasions where pressure values need to be measured individually. For example, in automobile manufacturing, pressure vessel monitoring and other fields, pressure transmitters are widely used in pressure monitoring and control systems.
Different measuring range and accuracy: the measuring range of differential pressure transmitter is usually larger, and different models and specifications can be selected according to the actual demand. Its measurement accuracy is also relatively high, often reaching 0.1% or higher accuracy.
The measuring range and accuracy of smart pressure transducer is relatively small, generally applicable to a smaller range of pressure measurement. Its measurement accuracy is usually 0.5% to 1%.
Different output signals: Differential pressure transmitters usually output analog signals, such as 4-20mA or 0-10 V. Such output signals can be easily connected and integrated with other instrumentation.
The output signal of smart pressure transducer can be selected as analog or digital signal according to different products and applications.
The analog signal output is similar to that of a differential pressure transmitter, while the digital signal output can be used to communicate with devices such as PLCs via a fieldbus interface.
Smart Pressure Transducer
smart differential pressure transmitter
Gas or liquid pressure monitoring: widely used in various industrial occasions, such as petrochemical industry, used to monitor the gas or liquid pressure inside the pipeline. In the natural gas transmission pipeline, the pressure transmitter can measure the pressure of natural gas in the pipeline in real time, to ensure that the pressure is within the safety range, to prevent pipeline rupture and other accidents.
Hydraulic system pressure control: In hydraulic equipment, pressure transmitters are used to measure and control the pressure of hydraulic oil. For example, in the hydraulic system of an injection molding machine, a pressure transmitter can accurately measure the system pressure to ensure the smooth running of the injection molding process.
Flow measurement: Used in conjunction with a throttling device (e.g., orifice plate, venturi, etc.), it calculates the flow rate by measuring the pressure difference before and after the throttling device. In water supply systems, the differential pressure transmitter is combined with an orifice plate flow meter in the pipeline to calculate the water flow rate based on the pressure difference.
Liquid Level Measurement: For liquid level measurement in sealed containers, differential pressure transmitters can determine the liquid level height based on the pressure difference between the bottom and top of the liquid (gas phase space). In chemical reactors, liquid level measurement by differential pressure transmitters can accurately control the addition of reaction materials.
is to consider the measuring range, the required accuracy of the measurement and the measurement function to be achieved.
is to consider the environment in which the instrument is used, whether there are toxic and hazardous gases and flammable gases.
is the nature of the measured medium, such as whether it belongs to the strong acid, strong alkali, whether viscous, whether easy to solidify or crystallize, whether gasification will occur. 4. is the change of operating conditions.
is the change of operating conditions. Such as several important parameters (temperature, pressure, etc.), and sometimes should also be considered to start and to normal production, the concentration of the two phases of the medium and density changes.
is to consider the actual properties of the object vessel under test. Such as whether its structure is complex, shape and size compliance. In addition, whether it can have an impact on its internal equipment accessories and import and export material orifice.
The actual properties of the container of the object under test are taken into account. For example, the complexity of its structure and the conformity of its shape and dimensions. In addition, whether its internal equipment accessories and import and export of material to the mouth of the impact.
is to consider the generality of the instrument selection, mainly to reduce the specification varieties, saving spare parts.
is to consider the actual process conditions. Such as the type of equipment to be measured, the physical and chemical properties of the medium, cleanliness, etc.. General selection of single-flange differential pressure transmitter is appropriate. For easy precipitation production is prone to produce junction products, should be used to insert the double-flange type.
The main difference between a smart pressure transducer and a differential pressure transmitter is that they measure different types of pressure. Pressure transmitters are used to measure a single pressure source, i.e., they measure the pressure at a single point, and are usually used to measure the pressure of gases or liquids. Differential pressure transmitters, on the other hand, measure the difference in pressure between two different pressure points, and are commonly used to measure the difference in pressure that occurs when a fluid flows through a pipe, for example, to measure the flow of a liquid. In short, a smart pressure transducer measures the absolute pressure, while a differential pressure transmitter measures the relative pressure difference. In practice, pressure transmitters are often used to monitor pressure levels in a system, such as inside a tank, pipe or vessel. They can provide continuous pressure readings to help ensure that the system is operating within a safe and efficient pressure range.
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