The MKS 431 Cold Cathode Vacuum Sensor offers long-lasting, reliable measurement across a wide pressure range from 1.0x10-11 to 1.0x10-2 Torr. Based on an inverted magnetron design, it uses the ionization probability of gas through high voltage discharge to deliver accurate and stable readings. With no filaments to burn out, no need for degassing, and no adjustments required, this sensor ensures maintenance-free operation in high-demand scientific and industrial environments. Part of the extensive MKS Granville-Phillips vacuum measurement range, the 431 and 423 sensors bring proven reliability to critical processes.
Product Features
- Inverted magnetron design increases measurement range and reliability
- Wide measurement range: 1.0x10-11 to 1.0x10-2 Torr
- Dual feedthrough for ion collection improves measurement accuracy
- Sensor tubes can be mounted in any position without affecting reading
- No filaments to burn out, reducing downtime and maintenance
- No need to degas the gauge, simplifying daily use
- No adjustment in emission current or filament voltage required
- 431 model has higher operating temperature and customized versions available
- 423 model offers compact size, lower cost, and higher bake-out temperature
- Part of a complete family of MKS Granville-Phillips vacuum solutions: Stabil-Ion, Micro-Ion, Convectron, and classic Bayard-Alpert gauges
Applications
- High energy physics
- Analytical instruments
- Laser production
- Ion implantation
- Mass spectrometry
- PVD (Physical Vapor Deposition)
Benefits
- Long service life thanks to cold cathode design without fragile filaments
- Stable, accurate readings across ultra-high vacuum applications
- Flexible installation – mount in any orientation without accuracy loss
- Reduced maintenance needs lower operating costs
- Dependable performance under high temperature and bake-out conditions
- Ideal choice for precision applications where reliability is critical
Why Choose the MKS 431 Cold Cathode Sensor 2¾” CF?
With its rugged inverted magnetron design and broad measurement range, the MKS 431 Cold Cathode Sensor provides accurate vacuum measurement without filaments or frequent calibration. Designed for harsh lab and industrial environments, it offers reliable, maintenance-free operation—making it a trusted choice for demanding research and production applications worldwide.
