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Mettler Toledo: Microgram weights

Mettler Toledo announces a new range of microgram weights with nominal values from 0.05 mg to 0.5 mg.
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The microgram weights will allow National Measurement Institutes and customers with specialized nanotechnology applications to use the direct comparison method to verify weight values below 1 mg. The weights are available with a calibration certificate so customers can be assured of full traceability to the International Prototype Kilogram. Mettler Toledo is the only weights manufacturer in the world to offer calibrated weights with such low nominal values thanks to a joint venture with the British National Measurement Office.

At the extreme end of weights engineering, the nominal values of the weights range from 0.05 mg to 0.5 mg with an astounding level of uncertainty of just 0.0002 mg (0.2 micrograms). The microgram weights are available individually, as well as in a convenient kit containing specially designed accessories and handling tools. The kit provides users with everything they need for calibration of weights and mass verification in the microgram range.

The microgram weights range was developed largely in response to the needs of the nanotechnology market which typically involves the manufacture of objects with dimensions of less than 100 nanometers (smaller than one ten-millionth of a meter), for example: computer chips and microscopic devices. The microgram weights have a wide range of applications in the mechanical testing of nano- and bio-material sensors. For instance, they can be used to calibrate the very fine cantilever of an atomic force microscope which is drawn over an uneven object to reveal the surface contours at sub-nanometer level.

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