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Old 23-09-2007, 07:48   #16
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I have 1 of these at home (the bottom one) and it works a treat

Weather Stations

I had the older version for about 10 years previously (on the boat) and found it very accurate and liked the 24 hour trend graph

Dave
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Old 28-09-2007, 13:25   #17
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The majority of Boat Barometers are just indicators...useful (if you mind them) to indicate up or down pressure changes..if you want accuracy they must be calibrated frequently.
The index needle is what you want to set...then watch were the indicator needle goes..above or below the index .
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Old 28-09-2007, 14:44   #18
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Gord, I know the human barometer is a reality. after 4 broken legs, broken back several didgits and (the worse one, a thumb!) and numerous contusions over the years I also feel every change in the weather. But a warm sandy beach and a little "rum-o-therapy" seems to help rest my barometer.

Robert White is a great company to know. I think the gave Revere his compass. Great folks.
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Old 28-09-2007, 19:43   #19
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Quote:
Originally Posted by Lancerbye View Post
The old analogue barometer used for a long time used horse hair as an element , the new digital type use a variety of pressure elements to do the same job.
I thought the horse hair was used in analogue hygrometers only?
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Old 28-09-2007, 21:48   #20
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Your right. Having worked on too many different types of instruments and being of an age where confusion is increasingly evident one does screw up once in awhile. I was recalling an old hand windup spiral chart recorder that was brought to me a few years ago because the other people in the trade had never seen such an antique. I guess they figured I had worked on the navigation system on the Ark (bunch of young upstarts). This particular unit had both a hygrometer and a barometer which is where i saw the horse hair element. Good thing someone out there is keeping us old farts on track. LOL
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Old 28-09-2007, 22:20   #21
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Ah, these windup chart recorders. We had one of those at the weather station of my maritime college. The barometer part worked with some kind of flat cylindrical bellows, and I don't know how many little arms and levers. But you could at least see what it was doing.
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Old 29-09-2007, 02:17   #22
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A lot of those link and lever circular recorders are still used to measure pressure, temperature and differential pressure, but the hand windup clock mechanism has been upgraded to battery operated mechanisms. Mostly in remote natural gas drying stations.
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