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Fischer Precision Aneroid Barometer Accuracy: ± 0.7 mb (± 0.02 inHg) Graduation: 0.5 mb and 0.01 inHg Dial: flat white finish; diameter 5.1" Units on dial: mb and inches of mercury Housing Diameter: 6.5" Weight: 1.6 pounds Measuring Range: 890 to 1050 mb = 26.30" to 31.00" For use at elevations below 2,600 ft. Why buy a barometer? $695.00   ...item# 1872f

Click an image for a larger view Alternate Dial Precision aneroid barometers are used for measuring the absolute atmospheric pressure. Because of the excellent instrument properties an aneroid barometer is indispensable for meteorology, ocean navigation, industry, and research. The self-stable set of five aneroid capsules, used in our precision aneroid barometers, is made of a corrosion proof copper-beryllium-alloy. This alloy has been well established for measuring the atmospheric pressure for many years because of its remarkable elastic properties. The aneroid capsules are nearly free of age-hardening, hysteresis and elastic after-effects. The influence of temperature on the set of aneroid capsules and the transmission system is compensated by a bimetal arm over the whole measuring range and for temperatures between -30 to +40 °C (-22 to 104 °F). The motion of the aneroid capsule is transmitted to the axle of the pointer by driving a segment and wheel with an excellent fine finish gearing. All bearings also have an excellent fine finish. The Instruments have only a bare minimum of idle friction because of the advantageous shape of the levers and bearings. To most experts, this is one of the highest quality aneroid barometers in the world. It has been tested at sea for over 70 years, and used by Navies and Weather Services around the world. The double needle design removes parallax error in reading. To access the set screw: The bottom of the instrument has a large plug. Use a wide screwdriver to remove this plug to reveal the small screw that sets the instrument as needed. You will find it has a very smooth, positive motion, so you can easily set the instrument to within a fraction of a mb, which is quite the contrary to what is observed in lesser instruments. The new dials showing both millibars (mb) and inches of mercury have been custom made for American and British users on land and sea. The mb (same as hectoPascals) dial is the international standard for maritime applications. A certificate of accuracy (view sample) is provided with each instrument. Each has a unique serial number on a metal plate on the top of the instrument. Download color brochure. Fischer Precision Barographs We also have available Fischer Precision Barographs in several models. Each is custom assembled to meet your needs. Prices as low as $850. Please allow 3 weeks for delivery. Choices include: housing style (approx. dimensions 11.5" x 6" x 7.5"), movement finishes, with or without extra dampening for use at sea, quartz clock or wind-up timers, and pressure range (depending on elevation of use). All devices have a certified accuracy of better than ± 0.7 mb over the full working range. Please contact us so we can help you meet your barograph needs with one of these extraordinary instruments that will provide generations of good service. Unique new barometer calibration resource at www.starpath.com/barometers. Go to that page, enter your latitude and longitude and elevation, and it will tell you the 10 closest sources of accurate pressure with a link to each one. There is also an instructions sheet with work forms.