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Low-voltage electron microscope is an electron microscope which operates at accelerating voltages of a few kiloelectronvolts or less. Traditional electron microscopes use accelerating voltages in the range of 10-1000 keV.
Low voltage imaging in transmitted electrons is possible in many new scanning electron detector.
Low cost alternative is dedicated table top low voltage transmission electron microscope. While its architecture is very similar to a conventional transmission electron microscope, it has a few key changes that enable it to take advantage of a 5 keV electron source, but trading off many advantages of higher voltage operations, including higher resolution, possibility of X-ray microanalysis and EELS, etc... Recently a new low voltage transmission electron microscope has been introduced that operates at variable voltage ranges between 6–25 kV.