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Topic: Aneroid barometer

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Atmospheric pressure

	Barometer - Wikipedia, the free encyclopedia
		The mercury barometer's design gives rise to the expression of atmospheric pressure in inches or millibars: the pressure is quoted as the level of the mercury's height in the vertical column.
		A simple aneroid barometer can be made using a latex membrane from a glove or balloon stretched over the mouth of a bottle and held in place with a rubber band.
		Aneroid barometers have a mechanical adjustment for altitude that allows the equivalent sea level pressure to be read directly and without further adjustment if the instrument is not moved to a different altitude.
	en.wikipedia.org /wiki/Barometer (952 words)

	Aneroid Barometer - Background, History, Raw Materials, Design, The Manufacturing, Quality Control, Byproducts/Waste
		The aneroid barometer is sensitive to temperature variations both because the capsule and its linkages will expand or contract as the temperature changes and also because the capsule's elastic properties (how much the capsule will deflect under changes in outside pressure) also change with temperature.
		By arranging for the aneroid capsule to push or pull on a point near the pivot of a see-saw-like lever, the movement of the capsule is greatly magnified at the far end of the lever.
		All aneroid barometers come with a zeroing screw to adjust the initial position of the sweep indicator to be the same barometric pressure as that of a very precise standard barometer kept at the factory.
	www.madehow.com /Volume-7/Aneroid-Barometer.html (2244 words)

	Atmospheric Pressure - Page 9 (Site not responding. Last check: 2007-10-23)
		The third part transfers movement of the chamber and is a linking mechanism, #3 - #9, to the fourth part, a pointer on the face of the aneroid barometer or to a pen to record on a moving graph the atmospheric pressure.
		The aneroid barometer operates on the same principle as the mercury barometer - balancing the weight of the atmosphere, - but differs in that instead of balancing against a column of mercury, it balances against the combined forces of the spring and the residual air within the chamber.
		Using the aneroid barometer provided, measure and record the atmospheric pressure (with the barometer sitting on the floor) at the first and fifteenth floors.
	www.met.tamu.edu /class/Metr304/Pressuredir/pressure-pg9.html (447 words)

	Barometer World & Museum - Home
		With aneroid barometers once set there should be no need to correct for altitude as you should then always be reading your barometer as if it was at sea level.
		If you have a fortin barometer, which is a metal tube with a glass reservoir at the base and scale at the top it will be designed to adjust the level of the mercury in the lower reservoir to the fuducial point which is a small ivory point.
		Aneroid barometers generally are similar in accuracy to mercury barometers, both do have some small errors even if made well.
	www.barometerworld.co.uk /FAQ.htm (2204 words)

	Aneroid Barometer Sensor/Instrument Document
		An aneroid ("using no liquid") barometer is an instrument that measures atmospheric pressure and operates by the effect of atmospheric pressure on a diaphragm that forms one wall of an evacuated chamber.
		The NCAR aneroid barometer is an integrated self-contained device whose sensing elements, conditioning electronics, and micro-processors control parameter sampling, scaling, and communication with the master remote station computer.
		The barometer consists of an aneroid transducer connected to a pressure plate and is mounted at a height of 2 meters.
	www-eosdis.ornl.gov /sensor_documents/aneroid_barometer.html (674 words)

	Electronic barometer (Site not responding. Last check: 2007-10-23)
		Precision aneroid barometers are used for measuring the absolute atmospheric pressure.
		Because of the excellent instrument properties an aneroid barometer is indispensable particularly for meteorology, ocean shipping, industry and research.
		The aneroid capsules are nearly free of age-hardening, hysteresis and elastic after-effects.
	fischer-barometer.de /english/luftdruck/aneroidbarometer/produkt.htm (160 words)

	The Aneroid Barometer (Site not responding. Last check: 2007-10-23)
		The principle by which the aneroid barometer functions is the balancing of atmospheric pressure by the elasticity of metal.
		Aneroid barometers have the advantage of being relatively easy to read, and require no corrections for change in temperature or latitude.
		It is therefore necessary to compare its readings with a standard barometer at fairly frequent intervals (at least once every three months is recommended), to ensure that changes in the elasticity of the metal have not altered its readings.
	www.mid-c.com /manmar/The_Aner.htm (235 words)

	Australian Exploration and the Introduction of the Aneroid Barometer
		Instead of relying on a column of mercury to balance atmospheric pressure the aneroid barometer uses the expansion or contraction of a sealed metal bellows.
		Clarke compared the four aneroids with three mountain barometers, ‘sufficiently often, and under a range of nearly an inch of pressure during the period of the experiments’ that he felt the aneroids indicated the changes of the atmosphere ‘with as much precision’ as the mountain barometers.
		In 1852, Flavelle Brothers offered the ‘new aneroid barometers, with metallic plates and attached thermometers’.(25) These were among a large assortment of instruments directed to ‘Gentlemen engaged in, or having a taste for, scientific pursuits’.
	www.usyd.edu.au /su/macleay/dAB.htm (2459 words)

	Bureau-Bureau of Meteorology - The Aneroid Barometer
		A barometer's main use, however, is not to measure altitude, but to measure the actual changes in the pressure of air at a particular place.
		The aneroid barometer is operated by a metal cell containing only a very small amount of air, or a series of such cells joined together.
		Your barometer will most likely be marked in tens of hectopascals (990, 1000, 1010 etc.) with further graduations given for each hectopascal, which enable it to be read reasonably easily to the nearest half hectopascal.
	www.bom.gov.au /info/aneroid/aneroid.shtml (1257 words)

	Belfort Instrument: Aneroid Barometer: Model 6079 (Site not responding. Last check: 2007-10-23)
		The Model 6079 Barometer is housed in a fl-enameled aluminum case and may be either wall or panel mounted.
		The case is air-tight, with a 1/8 - 27 NPT vent, which serves to admit atmospheric pressure to the movement of the barometer during shipment.
		The aneroid barometers are manufactured to meet the requirements of Military Specification MIL-B- 17089 and NWS Specification G101SP004.
	www.belfortinstrument.com /products/pressure/m6079.html (149 words)

	Aneroid Barometer
		The aneroid barometer shown in figure 9-7 is an instrument that measures air pressure at sea level.
		Remember-the dial of an aneroid barometer always indicates absolute pressure, not relative.
		Bourdon gauges, barometers, and manometers are instruments for the measurement of pressure.
	www.tpub.com /machines/9e.htm (733 words)

	Aneroid Barometer (glossary definition)
		Aneroid barometer An instrument for measuring atmospheric pressure.
		It is constructed on the following principles: an aneroid capsule (Vidie capsule, which is a thin, disk-shaped box or capsule, usually metallic) is partially evacuated of gas, and is restrained from collapsing by an external or internal spring.
		Magnification of the spring deflection is obtained both by connecting capsules in series and by mechanical linkages.
	nsidc.org /arcticmet/glossary/aneroid_barometer.html (81 words)

	Barometer World Ltd English Banjo Barometers
		Mahogany veneered aneroid barometer with fl & white stringing to edge with swan neck pediment, spirit thermometer, hygrometer and convex mirror
		Aneroid barometer with burr walnut veneer Ref: 641.8
		Aneroid barometer with burr walnut veneer and satinwood edging, swan neck pediment with spirit thermometer, hygrometer above and level at base
	www.buybarometers.co.uk /acatalog/English_made_Banjo_Barometers.html (425 words)

	USATODAY.com (Site not responding. Last check: 2007-10-23)
		The aneroid barograph consists of a slowly rotating cylinder with paper on it that can give up to a week's worth of air pressure records before new paper is needed.
		The aneroid barometer has some advantages over a mercury barometer because it is much smaller and can also record a week's worth of data.
		The aneroid barometer is the heart of altimeters used in modern aviation.
	www.usatoday.com /weather/waneroid.htm (221 words)

	Aneroid Barometer (Site not responding. Last check: 2007-10-23)
		An aneroid barometer is another instrument for measuring atmospheric pressure, however, it is not as accurate as the mercury barometer but it is much more portable.
		As pressure changes, the chamber flexes causing an arm and pointer to move along a scale indicating the air pressure.
		Another instrument for measuring pressure is a mercury barometer.
	cse.cosm.sc.edu /erth_sci/Atmos/Aneroid.htm (84 words)

	Chelsea Ship's Bell Aneroid Weather Barometer
		The Chelsea Ship's Bell aneroid barometer comes in your choice of two sizes: a 4 1/2" dial and a 6" dial.
		The timeless forged brass casing along with a hand silvered dial that is made the same way that it was in the 19th century creates a truly impressive barometer.
		The Ship's Bell Aneroid Barometer with Mahogany base, engraving and blue Chelsea gift box is $556.00 for the 4 1/2" Dial and is $742.00 for the 6" Dial.
	www.gormangiftgallery.com /chelshipbelb.html (373 words)

	Aneroid Barometer Shipstrike by Chelsea Clock Co.
		The Shipstrike barometer comes in your choice of two sizes: a 4 1/2" dial or a 6" dial.
		The barometer can be removed from the wood base for wall mounting.
		The Shipstrike Barometer with Mahogany base, engraving and blue Chelsea gift box is $416.00 for the 4 1/2" Dial and is $582.00 for the 6" Dial.
	www.gormangiftgallery.com /chelshipanba.html (330 words)

	Marine Aneroid Barometer & Clock - mahogany from Harold Cox & Sons
		A marine aneroid barometer and precision quartz clock set on a mahogany board with curl veneer and a rope inlay.
		The barometer is driven by a temperature compensated aneroid movement.
		These ships marine instruments are of an outstanding quality that would grace any home or office and also provide a reliable local forecast and of course the time.
	www.haroldcox.com /site/product/productid.11373 (85 words)

	Chelsea 6" Double Bellows Aneroid Barometer - Lawsonwatch.com
		Come back in an hour or two and see whether the barometer is rising or falling.
		A rising barometer means fair weather - a falling barometer, stormy weather.
		Barometer can be removed from base for wall mounting.
	lawsonwatch.com /ch6dobeanba.html (371 words)

	THE ANEROID BAROMETER, IT
		THE ANEROID BAROMETER, IT The Aneroid Barometer, Its Construction and Use
		In the 19th Century, the savvy tourist traveled with a pocket barometer so he could keep track of changes in atmospheric pressure.
		The general principle of construction of all aneroids is the same.
	www.popula.com /items_fp/item_description.cfm?item_fp_ID=51513 (115 words)

	eBay - aneroid barometer, Science, Medical, Science Medicine items on eBay.com (Site not responding. Last check: 2007-10-23)
		VINTAGE ANEROID BAROMETER - PRE WWII - COPPER?
		Vintage Taylor OP 780 Aneroid Barometer Charts NR!
		Antique Aneroid Barometer Oak 35 1/2" long Beautiful
	search-desc.ebay.com /search/search.dll?query=aneroid+barometer&... (313 words)

	Find in a Library: The aneroid barometer : its construction and use.
		Find in a Library: The aneroid barometer : its construction and use.
		The aneroid barometer : its construction and use.
		WorldCat is provided by OCLC Online Computer Library Center, Inc. on behalf of its member libraries.
	www.worldcatlibraries.org /wcpa/ow/8297f1625dc6d90f.html (72 words)

	HighBeam Encyclopedia - aneroid barometer (Site not responding. Last check: 2007-10-23)
		Find newspaper and magazine articles plus images and maps related to "aneroid barometer" at HighBeam.
		Edward Whymper (1840-1911): mountaineer, writer and artist, best known for making the first successful ascent of the Matterhorn, improving the aneroid barometer and studying altitude sickness.(Late Great Geographers #44)
		Hurricane Camille.(damages brought about by super typhoon Camille)
	www.encyclopedia.com /html/X/X-aneroidb.asp (110 words)

	Measuring Pressure - Aneroid Barometer (Site not responding. Last check: 2007-10-23)
		OK, let's discuss the different types of barometers....
		most common type of barometer for home use
		the aneroid cell volume is very sensitive to changes in atmospheric pressure:
	apollo.lsc.vsc.edu /classes/met130/notes/chapter9/aneroid_bar.html (38 words)

	Barometers, Isobars, Atmospheric Pressure and Pressure Units
		Below is a checklist of barometers, isobars (constant pressure lines), and atmospheric pressure and pressure units on postal items (stamps, souvenir sheets, aerogrammes, postal cards, etc.).
		Catalog numbers, years of issue, and notes on the items featured are given when available.
		This Website created and maintained by Don Hillger and Garry Toth.
	www.cira.colostate.edu /ramm/hillger/barometer.htm (249 words)

	The Weather Store : French Aneroid Barometer
		Home > Antiques > Antique Barometers > French Aneroid Barometer
		Nice small French aneroid barometer in a brass case.
		The dial is engraved Derepas Opten, 24 Palais-Royal 24, Paris numbered 28842, Barometre Holosterique Scale reading from 60-79.
	www.theweatherstore.com /franba.html (55 words)

	Precision Aneroid Barometer
		The Precision Barometer 6in lacquered brass case houses a precision rack-and-pinion temperature-compensated movement, and the main pointer has a knife edge to minimize parallax error when taking readings.
		Click here for Inventory Status and Shipping Calculator...
		The Precision Barometer is rated at an amazing +/- 0.05 inches (about +/- 1.5 millibars) in mid-range.
	www.ambientweather.com /prba.html (63 words)

	Antique wall aneroid barometer
		Antique brass wall aneroid barometer of French manufacture and sold by of Aird and Thomson, Glasgow, Scotland circa 1900.
		It has a rare feature of double thermometers - Centegrade and Fahrenheit.
		No part of this internet site may be reproduced in any form without permission from the owners.
	www.antique-marine.com /anwaanba.html (59 words)

	Chelsea 4 1/2" Dial Aneroid Barometer - Lawsonwatch.com
		Chelsea 4 1/2" Dial Aneroid Barometer - Lawsonwatch.com
		Home > Weather Stations & Instruments > Temperature, Barometric Pressure & Humidity Instruments > Chelsea 4 1/2" Dial Aneroid Barometer-40071
		Barometers measure the constant change in air pressure.
	www.lawsonwatch.com /ch41dianba.html (304 words)

	Aneroid Barometer
		Since air pressure affects weather, you can see why
		the use of a barometer is so important to ships.
		The aneroid barometer shown in figure 9-7 is an
	www.tpub.com /content/engine/14037/css/14037_60.htm (314 words)

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