{"id":7965,"date":"2026-04-10T09:30:21","date_gmt":"2026-04-10T01:30:21","guid":{"rendered":"https:\/\/www.air-tester.com\/?p=7965"},"modified":"2026-04-11T09:49:11","modified_gmt":"2026-04-11T01:49:11","slug":"qa-jing-du-gao-yi-wu-pan","status":"publish","type":"post","link":"https:\/\/www.air-tester.com\/en\/qa-jing-du-gao-yi-wu-pan.html\/","title":{"rendered":"Q&A: The higher the precision, the easier it is to misjudge? Uncovering the real stability logic of production line airtightness testing"},"content":{"rendered":"

As a source manufacturer in the field of airtightness testing and quality engineering for 17 years, JCGK has seen too many factories pursuing the \"airtightness test\" for the sake of \"quality\".Extreme Precision<\/strong>\" and choose the wrong equipment.<\/p>\n\n\n\n

Today I want to tell you a very real truth:Those 0.02% F.S. high-precision parameters that strike you at first glance may well be the most sophisticated traps in the industry!<\/strong>The<\/p>\n\n\n\n

Official nominal accuracy & cost tables for the world's top pressure sensor brands:<\/p>\n\n\n\n

Precision echelon<\/th>True Accuracy<\/th>Branding<\/th>Estimated cost (\u00a5)<\/th>Marginal notes<\/th><\/tr><\/thead>
Metrological\/laboratory grade<\/td>0.008%~0.02%F.<\/td>Paroscientific<\/td>40000~80000+<\/td>The cost of a single piece is higher than that of the whole machine of ordinary domestic hermetic tester.<\/td><\/tr>
<\/td><\/td>Mensor\/WIKA<\/td>15000~30000<\/td>Sensor Module for High-Level Calibration<\/td><\/tr>
High-end industrial\/aerospace grade<\/td>0.025%~0.05%F.<\/td>Rosemount 3051S<\/td>8000~20000<\/td>High-end industrial process standard<\/td><\/tr>
<\/td><\/td>Honeywell PPT2<\/td>4000~10000<\/td>Intelligent Temperature Compensation Sensor<\/td><\/tr>
OEM On-Board Chip Level<\/td>Less than 0.02%F.<\/td>Precision MEAS\/TE<\/td>600~1000<\/td>24-bit ADC chip, easily advertised by stealing concepts<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Mid-range of the marketairtightness leak detector<\/a>It's impossible to install a metrological grade sensor that costs tens of thousands of dollars.<\/strong><\/p>\n\n\n\n

I. Three worlds, three perceptions<\/h2>\n\n\n\n

When we talk aboutaccurate<\/strong>\"At the time, there was a clear cognitive stratification in the industry<\/p>\n\n\n\n