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Why the Sub-Meter Shows Flow but the Main Steam Flow Meter Reads Zero

Flow meter /

A Practical Troubleshooting Case Study In industrial steam measurement systems, discrepancies between sub-meters and the main flow meter are not uncommon. One particularly confusing situation is when the branch flow meter shows a stable flow rate, while the main meter continuously indicates zero flow. Is this a sensor failure?A wiring problem?Or is the issue hidden […]

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PROFIBUS vs. PROFINET: Key Differences in Industrial Communication Systems

Instrumentation /

In industrial automation, the comparison between PROFIBUS and PROFINET has been discussed for decades.Both communication technologies are defined and maintained by PI (PROFIBUS & PROFINET International) and belong to the same IEC standard family. While they share continuity in engineering philosophy and configuration concepts, their technical architectures represent two different generations of industrial communication systems.

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Understanding Analog and Digital Signals

Instrumentation /

In engineering and scientific fields, “signals” typically refer to a function that conveys information through variation with respect to some independent variable, most commonly time. The function’s values can represent physical quantities such as voltage, current, light intensity, sound pressure, or electromagnetic field strength. Analog Signals An analog signal is one that varies continuously in

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Common Corrosive Media and How to Select the Right Instruments

Instrumentation /

1. Overview In modern chemical and process industries, corrosion remains one of the most critical challenges affecting production stability, instrument reliability, and plant safety.Pipelines, flowmeters, level transmitters, and process sensors are exposed to a wide range of acids, alkalis, solvents, and gas–liquid mixtures, many of which may chemically attack wetted materials. Understanding the corrosive properties

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Small-Signal Cutoff in Flowmeters: Principles, Implementation, and Optimization

Flow meter /

Abstract Small-signal cutoff is an essential technique in industrial flow measurement used to suppress erroneous readings caused by zero drift, noise, and non-ideal process conditions.Although the phenomenon is common across all flowmeter types, the mechanisms that generate small signals differ significantly depending on measurement principle, instrument quality, environmental factors, and installation conditions.Appropriate cutoff configuration therefore

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Key Role of Dielectric Constant in Radar Level Measurement

Level meter /

Radar level transmitters are widely used across industrial applications to measure tank and vessel levels using microwave-based distance measurement.Among all selection parameters, the dielectric constant (εr) of the medium is one of the most critical factors affecting radar performance. 🔹 1. What Is Dielectric Constant and Why It Matters The dielectric constant, also called the

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Material Selection Guide for Electrode & Liner in Electromagnetic Flow Meters

Flow meter /

Selecting the proper electrode and liner materials is critical to ensure accuracy, reliability, and long service life of electromagnetic flow meters.Material choices must be made according to fluid properties such as corrosion, abrasiveness, temperature, and pressure. 1. Electrode Material Selection Principles Electrodes are in direct contact with the process fluid and serve as the signal

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5 Core Instrumentation Skills Every Technician Must Master

Instrumentation /

From Wiring and Calibration to Control Systems and Explosion Protection Anyone who works in field instrumentation knows the pain points: Wrong RTD wiring causing crazy temperature readings…Pressure transmitters damaged because someone forgot to depressurize…Control valves selected in the wrong fail-safe action…Or the constant pressure of working in hazardous zones… No worries—this guide summarizes five core

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Why Most Chemical Plants Prefer Radar Level Transmitters Over Ultrasonic

Level meter /

Level measurement may seem basic in process control, but its reliability directly impacts safety, efficiency, and production continuity.Across industries—especially chemical and petrochemical—engineering teams are increasingly replacing ultrasonic level transmitters with radar technology.Why is this shift happening? The answer lies in physics, performance, and field experience. 1. How They Detect Level: Radar vs. Ultrasonic Radar Level

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