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Why Should Pneumatic Valves Be Equipped with an Air Reservoir?

Valve /

1. Background In many field applications, pneumatic valves are installed with an auxiliary air reservoir (air tank), commonly referred to as a “gas bag.” However, feedback shows that operators often connect it incorrectly or even leave it unused, which compromises its intended function. The air reservoir plays a crucial role: under normal conditions it remains […]

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Integrating SIS and CCS in Chemical Plant Operations: Challenges and Considerations

PLC /

In the realm of chemical plant operations, the discussion about integrating Safety Instrumented Systems (SIS) with Central Control Systems (CCS) has gained attention. These two systems serve critical but distinct roles, and while integrating them might seem efficient, it poses significant technical and safety challenges. This article delves into the differences between SIS and CCS,

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Pressure Sensor/Transmitter Load Characteristics — An Engineer’s Guide

Pressure Transmitter /

Audience: Instrumentation engineers, system integrators, maintenance personnel Scope: Practical definition, sizing formulas, wiring topologies, worked examples, and checklists for 4–20 mA and 0–10 V outputs. 1) Why “load characteristics” matter Load characteristics (a.k.a. loading effect) describe how the measurement chain—sensor/transmitter, wiring, intrinsic‑safety devices, and receiving instruments—influences the signal. Any loading that steals compliance voltage or

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Classification of Pressure Sensors by Functional Application

Pressure Transmitter /

Pressure sensors, also known as pressure transducers, are devices that detect pressure changes in gases or liquids and convert these changes into standardized electrical signals. Based on their functional characteristics and application environments, pressure sensors can be categorized into several specialized types: 1. High-Temperature Pressure Sensors These sensors are designed to operate reliably in elevated

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Maintenance Guide for Electromagnetic Flowmeters

Flow meter /

Electromagnetic flowmeters are widely used in industrial processes for their accuracy, stability, and ability to measure conductive fluids. However, like all precision instruments, proper maintenance is essential to ensure long-term performance and reliability. This article outlines key maintenance tasks for electromagnetic flowmeters, including electrode cleaning, anti-corrosion care, routine inspection, and recalibration. 1. Electrode and Liner

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Practical Guide to Prevent Water Ingress in Radar Level Transmitters

Level meter /

Radar level transmitters are widely used in industries such as chemical processing, metallurgy, power generation, and water treatment due to their high accuracy and strong environmental adaptability. However, when installed outdoors, issues like rain, humidity, and condensation can lead to water ingress in the antenna cover, terminal housing, or electronics compartment—causing signal fluctuations, inaccurate measurements,

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Understanding Measurement Errors in Boiler Drum Water Level Using Differential Pressure Transmitters

Pressure Transmitter /

When monitoring and controlling boiler drum water levels, differential pressure (DP) transmitters are commonly employed due to their effectiveness in providing continuous and reliable measurements. However, understanding the potential sources of error in these systems is essential for maintaining accuracy and efficiency in boiler operations. Below, we delve into the primary factors that contribute to

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Pitot Tube Flowmeter Installation Guidelines (Part II)

Flow meter /

This document continues from Part I and focuses on installation requirements for Pitot tube flowmeters in gas and steam pipelines. Proper installation is essential to ensure reliable measurement and avoid common issues such as zero drift, oscillation, and excessive deviation. 3. Installation in Gas Pipelines Optimal Position in Horizontal Pipes When gas flows through horizontal

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White Paper: Cable Gland Thread Standards and Cable Outer Diameter Matching for Industrial Instrumentation

Instrumentation /

1. Importance of Cable Interfaces in Industrial Instruments Cable interfaces are critical components in industrial automation systems, ensuring reliable power supply and signal transmission between field devices and control systems. Their proper selection directly impacts: Mechanical stability (preventing cable loosening due to vibration or pull), Ingress protection (IP65/IP67) against dust, moisture, and corrosive gases, Electrical

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