Hirschmann Volumetric Glassware Calibration

Hirschmann volumetric measuring instruments made of glass are calibrated fully automatic with absolute precision.

High-resolution stepper motors control the plungers, which fill the instruments for the calibration, cameras and sensors read the meniscus exactly and robots make sure that the calibration marks or the ringmarks are set at the right spot with the highest possible precision. This calibration technology makes sure that our volumetric glassware offers very good accuracy (small deviation from the nominal volume) and excellent reproducibility (standard deviation from the mean value).

There are three different ways to calibrate volumetric measuring instruments made of glass:

IN: The correctly filled amount of liquid in the instrument is equivalent to the indicated nominal volume. This is common for measuring cylinders and volumetric flasks.

EX: The amount of liquid, pipetted according to the regulations is equivalent to the indicated nominal volume. The liquid that remains in the instrument after the waiting time is over, is not part of the volume. This is common for pipettes and burettes.

Blow-out: The nominal volume is equivalent to the amount of liquid, which is blown out with overpressure. The portion of liquid, which remains in the instrument is far less than with EX calibrated instruments. Blow-out calibrated instruments are recommended, when using electrical pipet aids, since this makes sure that the ideal compromise between volumetric precision and practically-oriented, fast working is achieved.