A lovely innovative design by Casella, London and one of the last produced by this long-established company. Initially developed for the larger, open scale barograph, the movement is of the ‘Jib’ crane style and has proved to be extremely accurate and sensitive to small pressure movements. The contemporary finish is very stylish in white and polished metal with an acrylic lift-off lid and would be perfect in a modern office or domestic environment.
A quantity of weekly charts is included together with
a fresh bottle of special blue recording ink and a reprinted
pamphlet by Negretti & Zambra describing operating
instructions and how to interpret typical chart recordings.
295mm wide x 155mm deep x 173mm high.
 
Note! For a busy observer, a monthly rotating clock is available at an additional £285 including 2 years supply of recording charts. The monthly clock has exactly the same proportions as the weekly drum (even the same fixing positions) and one of the blogs on my website graphically explains the advantages of the monthly recording.