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When Should a Venturi Flow Meter Use a Pressure Averaging Ring?

Flow meter /

Introduction Many engineers know that a Venturi flow meter works by measuring the differential pressure generated between the inlet section and the throat section. However, when it comes to special applications — such as high-pressure oxygen, dirty gas, slurry, black water, or systems with limited installation space — one important design question often appears: Should […]

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Industrial Instrument Environmental Requirements: Temperature, Humidity, Vibration and EMC Guidelines

Instrumentation /

Industrial instruments are widely used in harsh environments such as oil & gas, chemical plants, water treatment facilities, power generation, and manufacturing industries. However, even a high-quality instrument may experience measurement errors, signal instability, or premature failure if the installation environment does not meet its requirements. Environmental conditions such as temperature, humidity, vibration, electromagnetic interference,

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Valve Pressure Drop Explained: Why It Happens and How to Control It

Valve /

Introduction Valve pressure drop is one of the most important parameters in valve selection and piping system design. Many engineers have a common misunderstanding: “A higher upstream pressure means a higher valve pressure drop.” This statement is not always correct. Valve pressure drop is not determined by upstream pressure alone. The actual pressure loss across

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Why Does a Pressure Transmitter Leak Oil? Common Causes and Troubleshooting Guide

Pressure Transmitter /

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.

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How to Read AI, AO, DI, and DO Wiring in DCS Cabinets and Cable Schedules

Instrumentation /

Most Wiring Problems Are Not Equipment Failures During plant commissioning, many issues are not caused by defective instruments—they happen because the wiring drawings were misunderstood. A signal cable usually starts from an instrument in the field, passes through a junction box (JB), enters a marshalling cabinet, and finally reaches a DCS or PLC I/O module.

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The Future of Flow Meters: From Measurement Devices to Intelligent Industrial Nodes

Flow meter /

If you still think a flow meter is just an “industrial water meter” that only measures flow rate, you may be missing the biggest transformation happening in industrial instrumentation. Today’s flow meters are evolving from simple measurement devices into intelligent industrial assets. They are becoming connected, self-diagnosing, and increasingly integrated with automation systems, cloud platforms,

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Temperature and Pressure Compensation in Flow Measurement: Why It Matters for Accurate Gas and Steam Measurement

Instrumentation /

A Flow Meter Reading Is Not Always the Real Consumption A common misunderstanding in industrial flow measurement is that the value displayed on a flow meter always represents the actual amount of fluid consumed. However, this is not always true. In real industrial applications, temperature and pressure conditions are constantly changing. These changes directly affect

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Shielded vs. Unshielded Cables: What’s the Difference and How to Choose the Right One?

Instrumentation /

When selecting cables for industrial applications, many engineers encounter the same question: Why do some cables have shielding while others do not? Is a shielded cable always better? Can unshielded cables be used safely? The answer is not simply about price or cable quality. Choosing the wrong cable can lead to signal fluctuations, communication failures,

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The Flowmeter Is Still There — So What Changed Inside the Same Pipeline?

Flow meter /

The flowmeter may look the same, but the logic behind selecting one has changed dramatically. Ten years ago, if you walked into the instrumentation room of a chemical plant, you would see rows of orifice plates, vortex flowmeters, and variable area meters. Engineers carried thick selection manuals, turning to page 387 and checking boxes one

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How to Select an Electromagnetic Flow Meter for Chemical Applications

Flow meter /

Electromagnetic flow meters are widely used in the chemical industry because they provide reliable measurement with no moving parts and minimal pressure loss. Based on Faraday’s Law of Electromagnetic Induction, they are suitable only for conductive liquids and slurries. For chemical applications, proper selection depends on five key factors: Medium conductivity Liner material compatibility Electrode

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