Horizontal comparator for the system calibration of digital levels – realization at the Faculty of civil engineering, CTU Prague and in the laboratory of the Department of survey and mapping Malaysia (JUPEM) in Kuala Lumpur.

Metrological procedures require a leveling staff calibration for an estimation of a true staff scale.  The calibration process is usually realized on laboratory comparators. Two automatic comparators for digital level calibration were built by the staff of Department of Geomatics. This article brings some information about properties of developed systems and about a control software for the comparators.