Tungsten Filaments

Tungsten Filaments: Key Component in Electron Microscopy
Tungsten hairpin filaments represent the standard type widely used in Scanning Electron Microscopes (SEM), Transmission Electron Microscopes (TEM), and microprobe systems.

High-quality filaments are manufactured to original equipment manufacturer specifications, using special tools to ensure correct filament shape for optimal electron beam generation. Vacuum annealed, stress-free, and precisely aligned before shipment.

Material Properties
Tungsten filaments are made from high-quality tungsten, which has the highest melting point of all pure metals (3422°C / 6192°F), the lowest vapor pressure above 1650°C (3000°F), and the highest tensile strength. Tungsten also exhibits the lowest thermal expansion coefficient among pure metals, making it ideal for high-temperature applications.

Hitachi Type S Filaments
For new H-, S-, and X-series:

• Ceramic disk diameter: 9.8 mm
• Pin diameter: 1.2 mm
• Pin center-to-center distance: 2.7 mm

Pre-centered filaments available for Hitachi tabletop SEMs (TM3030plus, TM3030, TM3000, TM4000, TM1000) and models like S-3400N, S-3700N, SU800, SU900, SU-1500, SU1510, SU3500.

Characteristics and Benefits

• High-Quality Material: Selected for its high melting point and wear resistance, ideal for electron generation at elevated temperatures.
• Durability and Performance: Provide extended lifespan and stable output for continuous, efficient microscope operation.
• Versatile Applications: Used across scientific research and industrial materials inspection for nanoscale imaging detail.

Proper filament selection based on equipment specs and regular maintenance ensure optimal microscope performance.