Pressure Transmitter

📌 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

Paper, one of the Four Great Inventions of ancient China, remains a cornerstone of modern civilization. Today, the pulp and paper industry is not only essential to national economic development but also critical to environmental and societal progress. Among the many technologies supporting this industry, pressure sensors play a vital role across various stages—from raw

Hydropower generation harnesses the potential energy of elevated water sources—such as rivers, lakes, or reservoirs—and converts it into mechanical energy via a water turbine, which in turn drives a generator to produce electricity. As a renewable and environmentally friendly energy source, hydropower plays a vital role in the global energy mix. Pressure sensors are essential

1. Overview Bar-type flow meters, also known as insertion differential pressure flow meters, operate based on Bernoulli’s principle. By measuring the differential pressure generated across the sensor (total pressure minus static pressure), they calculate flow velocity and volume. Their simple structure, low pressure loss, and ease of installation make them ideal for large-diameter pipelines (typically

1. Differences in Application Requirements Pressure transmitters—especially differential pressure transmitters—often require range adjustments based on specific field conditions. For example, when used for level measurement in sealed tanks, condensation of the gas-phase medium can cause condensate to accumulate in the impulse lines or low-pressure chambers. This creates an unintended static pressure, resulting in output deviation.

Pressure transmitter accuracy is a key indicator of measurement reliability. However, the belief that “higher accuracy is always better” is not universally applicable. In industrial practice, the selection of a pressure transmitter should be based on actual application requirements, rather than pursuing the highest specification available. 1. Understanding Accuracy in Pressure Transmitters Accuracy defines how

1. Introduction Pressure gauges play a critical role in monitoring process pressure across industrial systems. Ensuring their safe and accurate performance is vital for operator safety, equipment protection, and process stability. This document outlines key safety measures including overpressure protection, environmental considerations, and vibration resistance for pressure gauges. 2. Overpressure and Pressure Relief Protection 2.1

This guide summarizes key field requirements for the installation and inspection of pressure instruments, following common industrial standards. 1. Installation Requirements Vertical Mounting: Vibration-resistant pressure gauges must be installed in a vertical orientation. Support Height: For pressure or differential pressure transmitters, the mounting pillar should be 1.2 meters tall. Capillary Tubes: Capillaries should be bundled