Standard 500 models
X500S Tungsten Cathode
X500FE Schottky Field Emission

Model
X500S X500FE
Cathode options
Tungsten (W) Schottky FE
SEI Resolution at
High Vac.
<3.5nm @ 30kV <1.5nm @ 25kV
Accelerating Voltage
40kV Standard
50kV Option 25kV Standard
30kV Option