September 12, 2026

This article systematically introduces the methodology for selecting domestically produced airtightness testers, using JCGK Jingcheng Engineering as an example, analyzing the technical characteristics and application scenarios of testing principles such as direct pressure, differential pressure, flow, volumetric, and negative pressure. The article emphasizes that repeatability is more important than accuracy and highlights the importance of custom fixture design and automation integration capabilities. It argues that the core of domestic substitution lies in total cost and implementation capabilities, rather than simple brand rankings.