In the era of industrial automation, efficient communication between devices is crucial. Modbus, as a widely used communication standard, allows different devices to exchange data. However, with the advancement of internet technologies, converting Modbus data into HTTP protocol provides an easier way to achieve remote control and monitoring. This article discusses why it’s essential to […]
Why Convert Modbus to HTTP? Read More »
In the field of instrumentation and process control, theory is like a wrench—it may seem insignificant, but when it matters, it’s essential. Whether for obtaining basic certification or for daily tasks, concepts such as circuit diagrams, sensor principles, and troubleshooting are crucial. This series will continue to update, helping you master theoretical knowledge while providing
In industrial maintenance, instrument technicians often face the dilemma of using a high-precision multimeter but struggling to accurately determine the temperature or check the health of resistance thermometers (RTDs) and thermocouples. Why can’t we get the correct temperature even after measuring the resistance? Why does the millivolt reading from the thermocouple never match the actual
Mastering Multimeter Usage to Estimate Temperature and Troubleshoot Faults Read More »
1. Don’t Be Fooled by “Surface Calmness” One of the biggest misconceptions in workshop safety is the familiar saying, “If no hazards are found, then everything is safe.” Just because the equipment is running smoothly and the floor looks clean doesn’t mean everything is in order. Many accidents occur in environments that initially appear to
Not Finding Hazards Does Not Equal Safety Read More »
In industries like chemicals, petrochemicals, and storage, ensuring the safety of storage tanks is a critical and complex task. Among various safety measures, pressure alarm systems play a foundational and essential role. Like a “warning system” for the tank, these alarms trigger immediate alerts when internal pressure rises abnormally, allowing operators to take action and
What is Pressure Alarm in Storage Tanks? Read More »
In an industrial setting, a common issue arises when a process tank is equipped only with a magnetic float level switch (magnetic float type) without a remote transmission feature, making it impossible for the central control system to monitor the level. In such cases, instrumentation solutions must be explored to provide remote level transmission. This
Have you ever noticed the numbers on the top of a bolt—like 8.8, 10.9, or 12.9? These are not just random figures; they represent the strength grade of the bolt, and they hold the key to ensuring safety and reliability in various structures, from bridges to wind towers to industrial buildings, and even in your
Understanding Bolt Grade Numbers: What Do They Mean? Read More »
When working with piping systems, understanding the relationship between Nominal Diameter (DN) and Outside Diameter (De) is crucial for accurate pipe selection, installation, and compatibility with fittings. This guide provides detailed insights into the DN and De relationship across different types of materials, including steel pipes and plastic pipes (PVC/PE/PPR). What is Nominal Diameter (DN)?
A Comprehensive Guide to Nominal Diameter (DN) and Outside Diameter (De) of Pipes Read More »
In modern industries such as chemicals, oil, pharmaceuticals, food, and environmental protection, level measurement plays a critical role in process control. For special media environments that are corrosive, prone to crystallization, high-viscosity, or prone to solidification, traditional differential pressure transmitters with capillary tubes often experience blockages, corrosion, or signal drift. In these cases, dual-flange level
How to Choose a Dual-Flange Level Transmitter? This Guide Has It All Read More »
During a recent device debugging session, I encountered an unstable RS485 communication issue. It reminded me of a fundamental yet crucial point: why must the voltage of an RS485 signal be confined within the -7V to +7V range? Many people may know this as a requirement but may not fully understand the reasoning behind it.
Why Is the RS485 Voltage Range Set from -7V to +7V? Read More »
