Knowledge
Welcome to the SJ Gauge Knowledge Center, featuring technical articles and application insights on pressure gauges, thermometers, diaphragm seals, smart transmitters, and industrial measurement instruments.
From selection guides and installation tips to real-world application experiences, we help improve measurement stability, equipment reliability, and overall process efficiency.
What Are the Internal Structures of Different Mechanical Pressure Gauges?
Why Can`t a Vacuum Gauge Reach -760 mmHg? How Does a Pressure Gauge Measure Vacuum?
What is a glass thermometer? How should you choose one? Learn 5 key facts about glass thermometers
What is a temperature probe? What are the differences in wiring between thermocouples and RTDs? How should you choose among K, N, S, E, and J types?
Dial Thermometer Selection Principles: Six Key Points for Purchasing Dial Thermometers!
Why are thermometers often inaccurate? What causes errors in temperature measurement?
The Difference Between Bimetal and Gas Expansion Thermometers?
The Accuracy Class and Limits of Error of Dial Thermometers
The Accuracy Grade and Tolerance Error of Dial Pressure Gauges
