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SS Scientific manufacture a wide range of High Quality replacement filaments to exact specification for electron, ion guns, x-ray sources, gauges and mass spectrometers. Our wealth of experience in manufacturing techniques used to produce these items is your guarantee of unbeatable quality.



The high quality of our filament manufacture is ensured by the use of filament alignment and tensioning jigs which have been custom designed. Our staff have great experience and expertise in all aspects of filament design, manufacture and coating which has contributed to improved mass spectrometer performance with increased filament lifetime, and reduced cost for our customers.

We currently manufacture filaments on an exclusive OEM basis for several instrument companies. If you have a need for a custom design filament, SS Scientific can help you with the design and manufacture the filament. If you are an Original Equipment Manufacturer (OEM), SS Scientific can aid you in the design of your filaments, produce prototypes and provide you with high quality filaments with timely delivery, all backed by our no-quibble warranty.

We also supply one off prototype filament assemblies from your specifications and drawings, manufacturing in quantities as required. At all times we work in partnership with you to develop a filament that is right for your application.


Filament Type:
  • Straight
  • Coiled
  • Custom Design


Choice Of Material:
  • Tungsten
  • Thoria
  • Yttria


Special Services:
  • Prototypes
  • Production quantities
  • Project Management

Filament Cleaning

Facilities and techniques used to clean filaments during manufacture include:

  • Sandblasting
  • Buffing wheels and Micromesh abrasives
  • Electropolish
  • UHV cleaning procedures


Filament Alignment

We operate a quality control procedure to ensure the accurate alignment of the filament carrier and wire. Using a video microscope enables us to accurately align the filament wire over the mass spec source ion entrance hole as well as perform quality control inspections of the filament and the welding process.

Precision Spot Welding

Different sized spot welder systems are used for manufacturing mass spec filaments. Depending on the filament, unique jigs have been custom designed and manufactured for the accurate alignment and tensioning of the filament wire on the filament support body during the spot welding process.

Filament Coating

We offer thoria or yttria filament coating, either as part of the filament manufacturing process, or as a service for coating filaments that you supply to us. The coating service has a no-quibble guarantee on performance.

Filament Conditioning

All filaments outgas when initially powered, but new filaments require a careful power ramp-up to avoid debris contaminating a UHV system. After coating, our filaments can be fully conditioned on a degassing rig to ensure that they arrive with you ready for immediate use.