Pressure Transmitter

Introduction In industries such as oil & gas, petrochemical, power generation, metallurgy, water treatment, and chemical processing, pressure transmitters and differential pressure (DP) transmitters are among the most widely used process instruments. They act as the “sensing nerve” of industrial control systems, providing critical measurement data for process control, safety protection, and equipment operation. However, […]

1. Preparation Before Inspection Before inspecting a differential pressure (DP) level transmitter equipped with a diaphragm seal and remote seal system, the following preparations should be completed: Contact the process operator and confirm the operating conditions. Obtain the required work permit according to site safety procedures. If the measurement loop is connected to a control

Why Does a Differential Pressure Transmitter Keep Fluctuating? In industrial process measurement, differential pressure (DP) transmitters are widely used for flow, level, and pressure measurement because of their reliability, simple structure, and wide application range. However, unstable DP transmitter output is one of the most frustrating problems faced by instrument engineers. A fluctuating DP signal

Oil leakage from an instrument sensor is one of the most common problems encountered in industrial measurement systems. When engineers discover oil leaking from a pressure transmitter or differential pressure transmitter, the first reaction is often: “The sealing ring must be damaged. Just replace it.” However, after replacing the seal, the leakage may appear again.

Many Installations Are Wrong — And It Can Affect Accuracy or Even Damage the Instrument In refineries, chemical plants, and storage terminals, remote seal differential pressure transmitters are widely used for level measurement in pressurized, vacuum, high-temperature, or corrosive applications. However, one installation detail is often overlooked: Where should the transmitter body be mounted relative

Pressure transmitters are widely used in industrial process control systems to measure pressure, differential pressure, and level. In real field applications, incorrect readings, unstable signals, or complete signal failure are common issues. These problems are often not caused by the transmitter itself, but by installation, wiring, process conditions, or maintenance practices. This guide summarizes the

Selecting a pressure transmitter may seem straightforward, but choosing the right model for a specific application requires careful consideration of many factors. A pressure transmitter that performs perfectly in one process may experience measurement errors, shortened service life, or even failure in another due to differences in temperature, pressure, medium properties, or installation conditions. Successful

During routine field inspections, pressure gauges are always one of the key checkpoints. Inspectors usually look for questions such as: Does the pointer return to zero? Is the calibration label still valid? Is the seal intact? Is there a red mark on the dial? Most people understand the first few items. But when it comes

In industrial pressure measurement, many engineers focus only on pressure range, output signal, or installation size, while overlooking one critical factor: Should the application use a gauge pressure transmitter or an absolute pressure transmitter? In many normal applications, a gauge pressure transmitter is completely sufficient. However, in some special operating conditions — especially vacuum, low-pressure,

Common Causes of Zero Drift and Practical Solutions Anyone working in instrumentation has probably encountered this problem: Low differential pressure transmitters and micro-pressure transmitters are among the most unstable instruments in industrial sites when it comes to zero drift. This is especially common in applications such as: Furnace draft pressure Air duct micro-pressure Clean room