This precision barograph used for continuous measurement of athmospheric air pressure. It is manufactured in the Schwazwald by the BARIGO company.
The machanic barograph has a battiere operated quartz clockwork in the solid brass drum, which makes the drum rotate once a week. A fiber pen attached to the tip of the writing arm records the change in air pressure on a graph paper attached to the drum. The air pressure and its change is measured by eight stacked pressure probes and precisely transferred to the writing arm by a mechanical linkage. The graph created, the barogram, provides the expert with information about the local weather trends, whereby it is not the absolute value of the air pressure that is relevant, but the changes in pressure.
The varnished mahogany wood case has a modern, simple handle and can be opened.
Supplied with one year's set of chart paper and one fiber pen.
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