The Sigma has a Schottky FEG, which provides good resolution and the Gemini column offers ease of use. The Sigma VP has a variable pressure mode for poorly conductive samples.

• Emitter: Schottky FEG
• Installation year: 2012
• Detectors: In-column SE, ETSE, BSE (5 segment), VPSE, STEM
• Resolution:
• Acceleration voltage: 0.1 - 30 kV
• Probe current: 4 pA - 20 nA
• Operating modes: High vacuum (10^-5 Pa), Variable pressure (2-133 Pa in N2)
• Stage: Motorized 5 axis (compucentric), X & Y 125 mm, Z 50 mm, T 0 - 90°, R 360°
• Specimen size: max. 250 mm diameter, max. 145 mm height