Recently, the "Differential Pressure Air Leak Detector" national standard (GB/T25752-2010) drafted by Yibo (Tianjin) Pneumatic was approved by experts and approved by the General Administration of Quality Supervision, Inspection and Quarantine and the National Standardization Administration. , was released on December 23, 2010 and implemented on October 1, 2011.

In the past, the traditional methods for detecting the tightness, such as the water-immersed visual bubble method or the pressure gauge pointer reading method, were low in detection accuracy and efficiency, and the influence of human factors was large, making it impossible to achieve automatic quantitative leak detection.

The differential pressure type airtight leak detector is based on the high precision measurement technology of the differential pressure sensor, which realizes direct differential pressure differential pressure leakage and overcomes the influence of ambient temperature. Objectively and automatically determine the quality of defective products, determine the output signal can also be used to drive external devices, is conducive to the realization of automation, with a high cost performance.

This standard is compiled on the basis of a summary of differential pressure leak detectors. The structure and product testing standards of leak detectors and sealed components leak detectors are given. Compared with the existing domestic and foreign standards, the standard is selected. The inspection method is more advanced and the content is more reasonable and perfect. The differential pressure leak detector makes positive contributions to the automotive, aerospace, electronics, and gas equipment, and also provides a broader space for development.