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Core Applications and Technical Advantages of Bimetal Thermometers

Temperature transmitter /

Bimetal thermometers are widely used mechanical temperature measurement devices known for their robust design, wide temperature range, and ability to function without external power supply. Based on the principle of thermal expansion, they convert temperature changes into mechanical displacement via bimetallic strips, which drive a pointer on a dial for direct reading. Due to their […]

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Installation Guidelines for Electromagnetic Flowmeters

Flow meter /

Electromagnetic flowmeters are precise instruments used in various industries for flow measurement. Proper installation is critical to ensure accuracy, reliability, and longevity of the device. This article outlines key installation considerations and provides detailed guidelines for achieving optimal performance. 1. Transportation and Handling Guideline: For flowmeters smaller than DN100 (4 inches), avoid applying force to

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Routine Maintenance Guide for Four-Wire Ultrasonic Level Transmitters

Level meter /

Ultrasonic level transmitters are widely used in industrial applications for continuous level monitoring. Proper maintenance ensures their measurement accuracy and prolongs service life. This guide outlines detailed and practical maintenance steps for four-wire ultrasonic level meters. 1. Sensor Surface Cleaning Regular Cleaning Use a clean, soft cloth or cotton swab moistened with alcohol to gently

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A Typical Case of Emergency Shutdown Due to Misoperation of Regenerated Catalyst Slide Valve in FCC Unit

Instrumentation /

1. Background In a 1 million tons/year Fluid Catalytic Cracking (FCC) unit, the regenerated catalyst slide valve (commonly referred to as the “spent catalyst slide valve”) plays a critical role. It is used to: Cut off catalyst circulation during startup and shutdown; Regulate the catalyst circulation rate during normal operation to control stripper level and

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Key Considerations for PLC System Configuration

PLC /

Introduction To make full use of a PLC (Programmable Logic Controller), two main tasks must be accomplished: hardware system configuration and user program design. This article focuses on how to configure the PLC system properly. System configuration refers to the hardware composition of the PLC. It includes selecting appropriate modules, quantities, and combinations based on

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Why Is a Reset Switch Essential in Interlock Systems? Design Principles, Logic, and Application

Instrumentation /

In the field of industrial automation, interlock logic diagrams act as the “safety brain” of a system—precisely controlling equipment startup/shutdown, alarm responses, and emergency shutdown sequences. They are directly tied to personnel safety and the stable operation of multimillion-dollar facilities. An improperly designed reset switch can render interlock protection ineffective. Even worse, a small error

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Intrinsically Safe Instruments: A Comprehensive Overview

Flow meter /

Intrinsically Safe (IS) Instruments are critical safety devices designed for use in hazardous environments where explosive gases, vapors, or dust may be present. These instruments operate by limiting the electrical energy available to a level that is too low to ignite a potential explosive atmosphere, thus providing a key layer of safety in industries such

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Characteristics of Chipless Tapping and Its Application in Vibrating Level Instruments

Level meter /

Abstract Chipless tapping, also known as extrusion tapping or roll tapping, is an internal threading process based on the principle of metal plastic deformation. This article provides a detailed explanation of the definition, advantages, and application scenarios of chipless tapping, particularly in vibrating level instruments. 1. Definition of Chipless Tapping Chipless tapping, also referred to

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How to Operate Analog Output in PLC: Three Common Methods Explained

PLC /

Introduction Analog output is widely used in industrial automation for controlling devices such as valves, variable frequency drives (VFDs), and actuators. In a Programmable Logic Controller (PLC), analog output represents a continuously variable signal (such as 4–20mA or 0–10V) rather than discrete ON/OFF switching. This article introduces three common methods for implementing analog output using

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