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Detachable Cap Bimetallic Thermometer: Features, Applications, and Working Principle

Temperature transmitter /

1. Overview The detachable cap bimetallic thermometer, also known as a bayonet-type bimetallic thermometer or removable cap bimetallic thermometer, is a widely used temperature measurement device in industrial applications. It is designed to measure the temperature of liquids, steam, and gaseous media within the range of -80℃ to +500℃. This thermometer is commonly utilized in […]

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Comparison of Orifice Plate, Nozzle, and Venturi Flowmeters: Application Scenarios and Selection Guide

Flow meter /

1. Introduction Differential pressure flowmeters are widely used in industrial fluid measurement due to their simplicity, reliability, and suitability for various process conditions. Among them, orifice plates, nozzles, and Venturi flowmeters are three of the most common types. This article compares their applicable conditions, advantages, limitations, and provides guidance for selecting the right type for

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Key Considerations When Signing Instrumentation Technical Agreements for New Projects

Instrumentation /

Instrumentation technical agreements are critical documents that ensure the success of automation and control system projects. When entering into new projects, especially those involving custom instrumentation, R&D collaboration, or system integration, it is essential to define responsibilities, deliverables, and risk-sharing mechanisms clearly in written agreements. This article outlines the major considerations to keep in mind

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Common Faults and Troubleshooting Solutions for Four-Wire Ultrasonic Level Transmitters

Level meter /

Ultrasonic level transmitters are widely used in industrial process control due to their non-contact measurement, high accuracy, and easy installation. However, like all instruments, they may encounter various faults during field operation. This article summarizes the most common issues found in four-wire ultrasonic level transmitters, their causes, and practical troubleshooting solutions. 1. Power Supply and

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Why Intermediate Relays Are Used in DCS DI/DO Circuits and Why Safety Barriers Are Required in AI Channels

Instrumentation /

In Distributed Control Systems (DCS), the integration of intermediate relays in Digital Input (DI) and Digital Output (DO) circuits, as well as safety barriers in Analog Input (AI) channels, is a common engineering practice. These components play critical roles in enhancing system stability, safety, signal integrity, and maintainability. This article explains the key reasons behind

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How to Properly Install a Temperature Sensor

Temperature transmitter /

Introduction Temperature sensors are among the most commonly used detection devices in industrial and environmental monitoring systems. Platinum resistance temperature detectors (RTDs), such as the Pt100, are known for their high measurement accuracy and stable performance. These sensors are widely applied not only for process temperature monitoring but also as reference standards in calibration systems.

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Understanding the Differences Between Availability, Reliability, and SIL

PLC /

In the fields of industrial automation, engineering, and functional safety, three concepts often arise: Availability, Reliability, and Safety Integrity Level (SIL). Although they are related to system performance and safety, their definitions, evaluation methods, and applications are distinct. This article explores the core differences, applications, and evaluation techniques of each. 1. Availability Definition: Availability refers

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Understanding the Relationship Between SIL and PFDavg in Low Demand Mode

PLC /

1. What Is SIL? SIL stands for Safety Integrity Level, a key concept defined in the international functional safety standard IEC 61508. It represents the level of risk reduction provided by a Safety Instrumented Function (SIF). SIL is typically used to describe the reliability and effectiveness of Safety Instrumented Systems (SIS) in preventing hazardous events.

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Practical Guide to Troubleshooting Dual-Flange Level Transmitters

Level meter /

Introduction Dual-flange level transmitters are widely utilized in industries such as chemical processing, petroleum, natural gas, and power generation for precise level measurement. However, the complexity of operational environments and various influencing factors can lead to diverse malfunctions over extended use. Effective troubleshooting not only ensures long-term operational stability but also significantly reduces maintenance costs.

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