Flow meter

The Flowmeter Was Powered On, But the Flow Reading Stayed at Zero In industrial applications, one of the most common complaints about electromagnetic flowmeters is: “The flowmeter is installed, powered on, but the display shows 0.00 m³/h even though the system is running.” When this happens, many users immediately suspect the flowmeter itself: The sensor […]

Many instrument engineers and technicians have a common question: “I work with instruments, calibration, and maintenance. Why do I need to understand laminar flow, transitional flow, and turbulent flow?” After all, fluid dynamics seems like a topic for process engineers rather than instrumentation specialists. However, in real industrial applications, many flow measurement problems are not

Introduction Orifice flow meters are widely used for measuring the flow rate of gases, steam, and liquids in industrial processes. However, when measuring compressible fluids such as gas and steam, the flow measurement accuracy can be significantly affected by changes in operating temperature and pressure. The reason is that the density of a compressible fluid

Electromagnetic flow meters are widely used for measuring the flow of conductive liquids in industries such as water treatment, chemical processing, mining, food production, and power generation. In normal operation, an electromagnetic flow meter provides a stable flow indication and sends the corresponding output signal to the control system. However, one of the common problems

Introduction During pipeline installation, one of the most common questions from field engineers is: “Can we simply weld the flow meter directly onto the pipeline?” Although welding may seem like a quick and convenient installation method, it is generally not recommended for most flow meters. The reason is simple: flow meters are precision measuring instruments,

Introduction In the world of industrial flow measurement, many advanced technologies have emerged in recent decades, including electromagnetic flow meters, ultrasonic flow meters, vortex flow meters, and Coriolis mass flow meters. However, the orifice plate flow meter, one of the oldest differential pressure flow measurement technologies, is still widely used in industries such as chemical

Your pump is running. The valve is open. There is liquid in the pipeline. But the electromagnetic flow meter still reads zero. What should you check first? Some technicians immediately check the grounding connection. Others disable the empty-pipe detection function or suspect that the transmitter has failed. However, a running process does not necessarily mean

A vortex flowmeter suddenly drops to zero. The operator calls and says: “Steam is still flowing, but the vortex meter shows nothing.” That sounds like a simple fault description. In reality, “no reading” can mean several completely different things: The local display is blank. The display is powered but instantaneous flow reads zero. The 4–20

Target flow meters are widely used for measuring challenging media such as high-viscosity fluids, slurry, liquids containing particles, and media prone to scaling. Compared with conventional flow meters, they are known for their excellent resistance to harsh operating conditions. However, like any industrial instrument, target flow meters can also experience signal problems during operation. Among

Introduction A magnetic flow meter (also called an electromagnetic flow meter or mag meter) measures flow based on Faraday’s Law of Electromagnetic Induction. Because the measurement signal generated by the electrodes is only at the millivolt level, the instrument is highly sensitive to: Ground potential differences Stray currents Electrical noise Improper grounding Static electricity interference