A setup for single axis precision force measurements in horizontal plane by 20 nN resolution

Varity of applications in science and engineering require technical abilities to conduct force measurements with high accuracy and precision in traceable manner. An example of such is the Lorentz Force Velocimetry (LFV), where forces of about 1 μN and below acting in horizontal direction on the object with approximately 1 kg weight are required to be resolved. In this paper we present a setup initially developed for this application, however, showing also a potential to be used elsewhere as a portable and conceptually unique setup. By the setup presented the force measurements in horizontal direction with 20 nN are resolved with 5 % to 7 % accuracy on the full range of the scale up to several mN.