Vacuum Gauge

Calibration Standards: Achieving Traceable Accuracy Vacuum gauge calibration is the foundation of reliable process control in mass spectrometry, PVD coating, vacuum heat treatment, battery manufacturing, and semiconductor applications. Without traceability to recognized standards, even the most expensive gauge can produce misleading data that compromises yield or experimental integrity. Industry best practice requires calibration against a

Electrode Wear: The Primary Life-Limiter in Cold Cathode Gauges Cold cathode vacuum gauges measure pressure through a self-sustaining Penning discharge in crossed electric and magnetic fields. In the VG-SM225 Cold Cathode Vacuum Transmitter from Poseidon Scientific, a ~100 Gauss NdFeB magnet and –2000 V (after –2500 V startup) potential drive electrons into long spiral trajectories,

Cold Cathode Ignition Threshold: The Physics Behind Premature “Zero” Readings High-vacuum cold cathode gauges, such as the VG-SM225 Cold Cathode Vacuum Transmitter from Poseidon Scientific, rely on a Penning discharge to generate a measurable ion current. A compact NdFeB magnet produces an axial field of ~100 Gauss while a high negative voltage (–2500 V for

Incorrect Polarity: The Most Common and Costly Mistake Connecting 24 V DC power with reversed polarity is the single most frequent wiring error when installing vacuum gauges in research labs, semiconductor tools, or vacuum heat-treatment systems. Both the VG-SP205 Pirani Vacuum Transmitter and VG-SM225 Cold Cathode Vacuum Gauge from Poseidon Scientific incorporate internal reverse-polarity protection