New FEI-Philips Tungsten Hair Pin Type Electron Microscope Filaments AR-Loop, Box of 10

New Tungsten Hair Pin Type Electron Microscope Filaments -AR Loop
For FEI and FEI-Philips, All Models - Box of 10

Tungsten Filament:         AR Tip
Base Type:                        Philips, FEI

Base Dimensions (mm)
Diameter of ceramic disc: 26.0mm
Diameter of pins: 1.0mm
Center to center distance of pins: 5.0mm

The AR loop filament represents a new level in the art in filament technology. Commonly used in multi-user environments and teaching laboratories, these filaments are excellent for applications which demand mechanical stability and long operating life. The etched taper loop configuration and unique tip geometry enhance contrast and brightness, even at low KV.
Philips and FEI standard S-loop and V-loop filaments are also available.
SPI Supplies tungsten hairpin filaments are the standard type filaments widely used in Scanning Electron Microscopes, Transmission Electron Microscopes and Microprobe systems. Produced to the original equipment manufacturer's specifications, these high-quality filaments are made using special tools to ensure the correct shape so as to generate the optimum electron beam. Manufactured from high-grade tungsten.

Tungsten filaments are also called cathodes or electron emitters or electron sources. We are oftentimes asked about "expected filament lifetimes" and that is a hard question to answer. Quite a bit is already known as to the factors that influence filament lifetimes; be sure you are aware of how you can get the maximum lifetime out of your tungsten filaments, be they new or retipped. In addition, the quality of the cleaning of the wehnelt cap when changing a filament can be, at least in some instruments, the single most critical factor affecting filament lifetimes.