A device is described that permits the remote attachment of standard weights, for calibration purposes, on the beam of an electronic microbalance that is enclosed in a vacuum chamber. The weights can be manipulated in a reproducible and imperturbable manner. The device consists of a self‐heating bimetallic element that controls the displacement of a suspension arm on which standard weights are suspended. The displacement of the arm is controlled electrically and can be operated in a vacuum tight chamber over a range of pressure.