Cold Cathode Gauge Signal Fluctuation at Transition Pressure In vacuum systems that cycle repeatedly between atmosphere and high vacuum, the pressure region around 10−3 Torr is the most dynamic—and the most prone to signal instability. At this exact transition the flow regime shifts from viscous (continuum) to molecular, gas density drops sharply, and the Penning […]

In high-throughput vacuum processes such as reactive sputtering, plasma-enhanced CVD, and large-scale PVD coating, continuous gas injection creates significant gas loads—often 10–100 Torr·L/s or more. Maintaining stable process pressure while pumping away the introduced gas demands precise, repeatable vacuum measurement. Yet many gauges struggle under these conditions: thermal sensors drift with gas composition changes, while

In demanding industrial environments—physical vapor deposition (PVD), chemical vapor deposition (CVD), vacuum metallurgy, and heat-treatment furnaces—vacuum gauges face constant exposure to vibration, process-gas contamination, thermal cycling, and occasional pressure spikes. A gauge failure in these settings can halt a multi-million-dollar production line for hours or days. Hot-cathode ionization gauges (such as Bayard-Alpert or triode types)