Vacuum Gauge

Introduction Pirani vacuum transmitters provide fast, reliable pressure measurement in the rough-to-medium vacuum range by exploiting the thermal conductivity of residual gas. Unlike ionization gauges that require high voltage and magnetic fields, the Pirani operates on a simple thermal principle: gas molecules carry heat away from a heated filament, and the rate of heat loss […]

Introduction The cold cathode ionization gauge is a cornerstone of high-vacuum measurement, offering reliable pressure readings from 10−7 to 10−3 Torr without the filament-related limitations of hot-cathode designs. At Poseidon Scientific, we developed the VG-SM225 Cold Cathode Vacuum Gauge around the proven inverted-magnetron geometry to deliver stable, low-maintenance performance for semiconductor research, PVD systems, vacuum

Introduction Vacuum measurement ranges are the foundation of reliable process control in semiconductor manufacturing, physical vapor deposition (PVD), vacuum furnaces, and countless other industrial systems. Understanding where “rough,” “medium,” and “high” vacuum begin and end—and which gauge technology excels in each regime—helps engineers specify the right sensor the first time, avoid costly crossover errors, and