Instrument selection|Pressure transmitter selection Guide——Measuring Medium
2024-07-19 14:57 Pressure transmitters are usually used to measure the pressure of gas or liquid. When selecting a dp pressure transmitter, it is essential to consider the nature of the measuring medium. For example, when measuring corrosive media, it is necessary to select a pressure transmitter with a corrosion-resistant material; When measuring high-temperature media, it is essential to choose a pressure transmitter that can withstand high temperatures. In addition, factors such as the density and viscosity of the measuring medium need to be considered to ensure the digital pressure transmitter(https://youtu.be/Mjo9f5fgh8w) can accurately measure the pressure.
Here are some common types of pressure transmitters and their application scenarios:
1、Gauge pressure transmitter(https://youtu.be/xlPTRkx3mao): local atmospheric pressure as a reference zero, suitable for atmospheric pressure as a benchmark measurement.
2、Absolute pressure transmitter(https://youtu.be/Mjo9f5fgh8w): With vacuum as reference zero, absolute pressure transmitter is suitable for measuring pressure relative to vacuum.
3、Differential pressure transmitter(https://youtu.be/Mjo9f5fgh8w): Measure the pressure difference between two pressure cavities, suitable for simultaneous measurement of two media or the same media at different points of the pressure difference.
4、Diaphragm level transmitters(https://youtu.be/u1_o1O61NWA)\Remote mount seal level transmitter(https://youtu.be/17nyHCIdyr4): Convert the pressure to liquid depth and are suitable for liquid measurement.
5、Medium and high-temperature pressure transmitter: suitable for measuring field ambient temperature or measuring medium temperature is high, with good zero temperature coefficient and sensitivity temperature coefficient, to ensure measurement accuracy in high-temperature environment.
In addition, Digital pressure transmitters, with corrosion resistance and long-term stability, are suitable for the measurement of gaseous media. Capacitive transmitters usually use stainless steel or aluminum alloy nozzles to adapt to the chemical characteristics of different gases. Digital pressure transmitters provide us with different options.