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 […]

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

1. Introduction Electromagnetic flowmeters are widely used in water treatment, chemical, and industrial applications due to their high accuracy and reliability. However, in real field applications, users may occasionally encounter alarms such as: Empty Pipe Detection (EPD) Excitation Fault (EXC / EXT ERR) Unstable readings or signal loss This article shares a real field case

Project Background A customer in Taiwan required two inline thermal mass flow meters for industrial gas monitoring applications. The project involved different gases and operating conditions, including nitrogen (N₂) and natural gas measurement. The customer required: Stable low-flow gas measurement Compact inline installation RS485 communication Explosion-proof protection Local LCD display with totalizer High temperature resistance

Selecting a reliable flow meter for large diameter circulating water pipelines (starting from DN400 and extending to DN2000 or even larger) has never been an easy task. For small and medium pipe sizes (generally below DN400), electromagnetic flow meters are usually the preferred choice because they offer a good balance between accuracy and reliability. If

Why Some Electromagnetic Flowmeters Become Unstable Over Time? Many engineers focus on lining material, electrode type, or brand when selecting an electromagnetic flowmeter. However, in real industrial applications, one hidden factor often determines long-term stability and accuracy: 👉 Excitation Mode A wrong excitation type can lead to: Zero drift Unstable readings Noise interference Frequent maintenance

Introduction: Why Many Engineers Choose the Wrong Flowmeter In industrial projects, one of the most common mistakes is: 👉 Using the wrong flowmeter for the medium. This often leads to: ❌ No signal or unstable readings ❌ Large measurement errors ❌ Frequent alarms or maintenance Understanding the difference between electromagnetic flowmeters and vortex flowmeters is

Introduction: Why Flowmeters Fail in Real Projects Electromagnetic flowmeters are widely used for conductive liquids due to their high accuracy and reliability. However, in real industrial environments, many failures are not caused by the instrument itself — but by installation, maintenance, or environmental factors. In this article, we share 4 real cases from the field

Introduction: The Hidden Killer in Two-Phase Flow Measurement In two-phase flow measurement, most engineers focus on model selection. But in real industrial applications, the biggest problem is often something else: Installation. Even if you select the correct flow meter, small mistakes in: Installation position Back pressure Pipe stress Flow regime can lead to: Signal fluctuations

Vortex flow meters operate based on the Kármán vortex shedding principle.When fluid flows past a bluff body (vortex shedder), alternating vortices are generated downstream. The shedding frequency is directly proportional to the fluid velocity, allowing accurate flow measurement. Although vortex flow meters are widely used for steam, gas, and liquid flow measurement, some common faults