Pressure Transmitter

📖 Introduction An Absolute Pressure Transmitter is a precision instrument designed to measure pressure relative to a perfect vacuum (zero absolute pressure). Unlike gauge pressure transmitters, which reference atmospheric pressure, absolute pressure transmitters use a sealed vacuum as the reference point. This makes them essential in applications where atmospheric pressure variations would otherwise affect accuracy. […]

1. Introduction Pressure sensors are among the most widely used devices in industrial automation, with applications spanning water and wastewater systems, railway transportation, intelligent building management, aerospace, defense, petrochemicals, oil and gas production, power generation, and manufacturing. Their ability to accurately monitor and control pressure in diverse environments makes them indispensable for ensuring process reliability

1. Background Urban water supply systems rely heavily on modern communication, control, and sensing technologies to ensure safe, efficient, and reliable water distribution. Among these technologies, pressure sensors play a crucial role in monitoring pipeline conditions, detecting system faults early, optimizing maintenance efforts, and minimizing operational risks. By continuously measuring pipeline pressure and transmitting real-time

1. OverviewFlange-type level transmitters are widely used in industrial processes for continuous level measurement in various storage tanks, vessels, and reaction containers. These instruments are commonly applied in sectors such as metallurgy, chemical processing, environmental protection, electric power, pulp and paper, pharmaceuticals, textiles, food and beverage, and municipal engineering. Their popularity is closely related to

In the specialized environment of cold storage, accurate pressure measurement is critical to the stable operation of refrigeration systems and the safe preservation of stored goods. However, the low temperature and high humidity conditions commonly found in cold storage facilities pose significant challenges to the performance and reliability of pressure gauges. Understanding how pressure gauges

Pressure sensors are among the most widely used devices in industrial applications. They are essential for automation and monitoring across industries such as hydropower, transportation, aerospace, military, petrochemicals, oil fields, power generation, and building automation. This article introduces the working principles of four common types of pressure sensors. 1. Piezoresistive Pressure Sensors Working Principle: Piezoresistive

1. Preparation Ensure that both high-pressure and low-pressure isolation valves are closed. Confirm that the equalizing valve is in the open position. 2. Line Flushing Open the drain valve. Slowly open the primary process valve to flush the impulse lines. Perform flushing at least twice. Close the drain valve after flushing. 3. Cooling and Air

📌 Background In a 200,000-ton/year Linear Alkylbenzene (LAB) production unit, pressure transmitters located at the fractionation tower outlet were frequently failing due to severe corrosion. The process medium contained high-temperature, moist hydrofluoric acid (HF), which quickly attacked the Monel diaphragm of the pressure transmitters. On average, the transmitters lasted only 2–3 days before showing drifting

The diaphragm of a pressure transmitter plays a crucial role in determining measurement accuracy, long-term stability, and the overall reliability of the device. Choosing the correct diaphragm material and structure is essential to ensure optimal performance and durability, especially in demanding industrial environments. 1. Understand the Properties of the Measured Medium The first step in

In industrial operations, it’s common for engineers and inspectors to ask:“Must every pressure gauge have a red line indicating the maximum working pressure?”And if a gauge lacks this red mark, does it represent a safety hazard? Let’s explore this question from three critical perspectives: the purpose of the red mark, relevant regulatory requirements, and practical