Dual-Chamber Vacuum Helium Leak Testing Equipment for Automotive Air Springs, ≤1*10⁻⁶ mbar·L/s High-Sensitivity Leak Detection with Helium Recovery Product Brief Description HeJin Dual-Chamber Vacuum Helium Leak Testing Equipment is designed for high-precision airtightness and micro-leak testing of automotive air springs and related pneumatic sealing components. Using nitrogen for large-leak detection and helium as the tracer gas for micro-leak detection, the system combines