I run my barograph all the time, it`s a Norfolk barograph from Russell Scientific Instruments. I`ve had it for around 13 years so I`ve got charts going back that far. I was feeling a bit flush when I bought it for around £800 but todays price is around £1500.
If I had been aware of digital barographs back then I would probably have bought one instead. Mine only records air pressure while your digital one seems to do much more.
It`s a fine looking instrument though, all mahogany, brass, and bevelled glass (it should be for the price) and takes pride of place on top of the piano.
Eric. Cheadle Hulme, Stockport.