Why are these barometer scales different?

[Spirit (of Glenans)]

Why 'should'? As it happens, I continue to use mm Hg, but my old hall barometer reads in inches and I am not aware of any law that forbids its use. I can't get used to names such as pascals, or even newtons for that matter, so for my remaining decade or so I shall ignore the thought police and use whatever suits me at the time.

It is, of course, your prerogative, not to be compelled to use any particular units, but for my part, I prefer use the same ones as the Met Office.

 

[john_morris_uk]

from which captains cabin did you nick that ?

Very funny.

eBay

 

[tico]

I bought my dad an identical barograph after he had hankered after one for many years - Ex Carrier Met officer

 

[LONG_KEELER]

I rely on a Garmin watch for air pressure although I do like the look of a nice barometer in a cabin.

The watch beeps if there is a drop in so many millibars over a particular time which can be set.
I think I'm learning more about weather/pressure with the watch than the I did with the fixed one. I used to radio the Coastguard each season for a setting when near a station. They were always very accommodating . I expect the service has finished now.

 

[snowbird30ds]

I like the gerbils per square furlong scale, anyone got a conversion chart?

 

[AntarcticPilot]

I like the gerbils per square furlong scale, anyone got a conversion chart?

The Register has a useful conversion chart