Instrumentation

SPD Grounding, Equipotential Bonding and Surge Current Paths Explained When people talk about lightning protection for industrial instruments, many simply think: “Just install a surge protection device (SPD) and connect a grounding wire.” However, engineers who have worked in real industrial plants know that lightning protection is far more complicated than that. Industrial instruments are […]

Introduction A level switch is one of the most commonly used instruments in industrial process control systems. It is mainly used for detecting whether the liquid or solid material level reaches a preset position and then sending a switching signal to control pumps, valves, alarms, or other equipment. Compared with continuous level measurement instruments such

PLC vs DCS: Is PLC Really an Automation System? Understanding the Difference Some engineers believe that process control must use a DCS system, while PLCs should only be used for machine control and cannot be considered a true automation system. This statement sounds reasonable at first glance, but is it really correct? What is the

Why More Alarms and Interlocks Do Not Always Mean Safer Operation? In industrial plants, engineers often assume: Earlier alarms, more interlocks, and more protection systems always mean higher safety. However, real process safety design does not work this way. Operating range, alarm limits, DCS interlock values, SIS trip settings, safety valve set pressure, and equipment

In a boiler feedwater system, engineers often find a pump installed before the main feedwater pump: Deaerator → Feedwater Booster Pump → Main Feedwater Pump → High-Pressure Heater → Boiler A common question for new engineers is: “The main feedwater pump already has the ability to increase pressure. Why do we need another pump in

Does More Maintenance Always Mean Better Equipment Reliability? Does increasing maintenance frequency always make equipment more reliable? Does installing vibration and temperature sensors automatically reduce equipment failures? The answer is not always. During discussions with industrial plants about equipment reliability, one question appears repeatedly: Should we use Preventive Maintenance (PM) or Predictive Maintenance (PdM)? Many

Extreme weather conditions such as typhoons, hurricanes, heavy rain, and thunderstorms can seriously challenge industrial instrumentation systems. For instrumentation engineers, a storm is not only a weather event — it is also a reliability test for field instruments, control systems, and electrical protection. During severe weather, problems such as water ingress, unstable signals, communication failures,

Difference Between Static Bonding and Static Grounding in Industrial Facilities In chemical plants, oil and gas facilities, pharmaceutical factories, coating systems, and powder handling processes, small metal bonding wires can often be found across pipe flanges, equipment doors, and removable covers. Many people assume these wires are simply “grounding cables.” However, their actual purpose is

Introduction In industrial environments, a portable gas detector is not simply a device that can be turned on and carried into the workplace. For operations involving confined spaces, chemical plants, wastewater treatment facilities, storage tanks, underground pipelines, and process equipment, proper use of a portable gas detector is critical for protecting workers from invisible hazards.

A Practical Guide to Current Transformers and Voltage Transformers Many engineers know the basic definition: CT measures current PT measures voltage This statement is correct, but in real electrical systems, this understanding is not enough. Both Current Transformers (CTs) and Potential Transformers (PTs), also called Voltage Transformers (VTs) are used to convert high-voltage system parameters