Wheeler, London Compensated Pocket Barometer or Altimeter. Instrument marked 1941 on face, as well as B. Both marked with the Broad Arrow for British War Department. The outer rotating ring is quite stiff. The item “T Wheeler London Pocket Barometer Altimeter WW2 1941 Broad Arrow & Case” is in sale since Sunday, February 24, 2019. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “avionsunantiques” and is located in Victoria, British Columbia. This item can be shipped to United States, Canada, United Kingdom, China, Germany, Japan, France, Australia.

• Maker: T Wheeler
• Original/Reproduction: Original

DATED 1888 and with British Government “BROAD ARROW” that signifies that this Altimiter was once British Government Property and likely produced for a Military Contract. The previous owner advised that he believed that this was USED by the fledgling British Army ROYAL FLYING CORPS who did initially use BALLOONS and later early Biplane like aircraft that would NOT have had a great deal of instrumentation compared to later WW2 era or “modern” aircraft. An altimeter or an altitude meter is an instrument used to measure the altitude. Of an object above a fixed level. The measurement of altitude is called altimetry , which is related to the term bathymetry. The measurement of depth under water. A barometric altimeter, used along with a topographic map, can help to verify one’s location. It is more reliable, and often more accurate, than a GPS receiver for measuring altitude; the GPS signal may be unavailable, for example, when one is deep in a canyon, or it may give wildly inaccurate altitudes when all available satellites are near the horizon. Because barometric pressure changes with the weather, hikers must periodically re-calibrate their altimeters when they reach a known altitude, such as a trail junction or peak marked on a topographical map. Altitude can be determined based on the measurement of atmospheric pressure. The greater the altitude, the lower the pressure. When a barometer is supplied with a nonlinear calibration so as to indicate altitude, the instrument is called a pressure altimeter or barometric altimeter. A pressure altimeter is the altimeter found in most aircraft. And skydivers use wrist-mounted versions for similar purposes. Hikers and mountain climbers use wrist-mounted or hand-held altimeters, in addition to other navigational tools such as a map, magnetic compass, or GPS receiver. The calibration of an altimeter follows the equation. \displaystyle z=c\;T\;\log(P_{o}/P). Where c is a constant, T is the absolute temperature, P is the pressure at altitude z, and P. Is the pressure at sea level. The constant c depends on the acceleration of gravity and the molar mass of the air. However, one must be aware that this type of altimeter relies on “density altitude” and its readings can vary by hundreds of feet owing to a sudden change in air pressure, such as from a cold front, without any actual change in altitude. ALL my items are GUARANTEED 100% GENUINE, the GUARANTEE is GOOD for “life”. Track Page Views With. Auctiva’s FREE Counter. Add a map to your own listings. The item “Antique Altitude ALTIMETER 1888 British BROAD ARROW Marking by T. Wheeler London” is in sale since Thursday, November 02, 2017. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “phillip_in_new_zealand” and is located in Auckland (aprox. 12,000 “clicks” from USA). This item can be shipped worldwide.

• Maker: T. Wheeler Scientific Instruments London UK 1888
• Original/Reproduction: Original
• Balonist Mountain Climber Geographer: Brass Glass Leather enamel face Blued Steel hand

This item is located in Edinburgh Scotland. DATED 1888 and with British Government “BROAD ARROW” that signifies that this Altimiter was once British Government Property and likely produced for a Military Contract. The previous owner advised that he believed that this was USED by the fledgling British Army ROYAL FLYING CORPS who did initially use BALLOONS and later early Biplane like aircraft that would NOT have had a great deal of instrumentation compared to later WW2 era or “modern” aircraft. An altimeter or an altitude meter is an instrument used to measure the altitude. Of an object above a fixed level. The measurement of altitude is called altimetry , which is related to the term bathymetry. The measurement of depth under water. A barometric altimeter, used along with a topographic map, can help to verify one’s location. It is more reliable, and often more accurate, than a GPS receiver for measuring altitude; the GPS signal may be unavailable, for example, when one is deep in a canyon, or it may give wildly inaccurate altitudes when all available satellites are near the horizon. Because barometric pressure changes with the weather, hikers must periodically re-calibrate their altimeters when they reach a known altitude, such as a trail junction or peak marked on a topographical map. Altitude can be determined based on the measurement of atmospheric pressure. The greater the altitude, the lower the pressure. When a barometer is supplied with a nonlinear calibration so as to indicate altitude, the instrument is called a pressure altimeter or barometric altimeter. A pressure altimeter is the altimeter found in most aircraft. And skydivers use wrist-mounted versions for similar purposes. Hikers and mountain climbers use wrist-mounted or hand-held altimeters, in addition to other navigational tools such as a map, magnetic compass, or GPS receiver. The calibration of an altimeter follows the equation. \displaystyle z=c\;T\;\log(P_{o}/P). Where c is a constant, T is the absolute temperature, P is the pressure at altitude z, and P. Is the pressure at sea level. The constant c depends on the acceleration of gravity and the molar mass of the air. However, one must be aware that this type of altimeter relies on “density altitude” and its readings can vary by hundreds of feet owing to a sudden change in air pressure, such as from a cold front, without any actual change in altitude. ALL my items are GUARANTEED 100% GENUINE, the GUARANTEE is GOOD for “life”. Track Page Views With. Auctiva’s FREE Counter. Add a map to your own listings. The item “Antique Altitude ALTIMETER 1888 British BROAD ARROW Marking by T. Wheeler London” is in sale since Tuesday, September 12, 2017. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “phillip_in_new_zealand” and is located in Auckland (aprox. 12,000 “clicks” from USA). This item can be shipped worldwide.

• Maker: T. Wheeler Scientific Instruments London UK 1888
• Original/Reproduction: Original
• Balonist Mountain Climber Geographer: Brass Glass Leather enamel face Blued Steel hand

This item is located in Edinburgh Scotland. DATED 1888 and with British Government “BROAD ARROW” that signifies that this Altimiter was once British Government Property and likely produced for a Military Contract. The previous owner advised that he believed that this was USED by the fledgling British Army ROYAL FLYING CORPS who did initially use BALLOONS and later early Biplane like aircraft that would NOT have had a great deal of instrumentation compared to later WW2 era or “modern” aircraft. An altimeter or an altitude meter is an instrument used to measure the altitude. Of an object above a fixed level. The measurement of altitude is called altimetry , which is related to the term bathymetry. The measurement of depth under water. A barometric altimeter, used along with a topographic map, can help to verify one’s location. It is more reliable, and often more accurate, than a GPS receiver for measuring altitude; the GPS signal may be unavailable, for example, when one is deep in a canyon, or it may give wildly inaccurate altitudes when all available satellites are near the horizon. Because barometric pressure changes with the weather, hikers must periodically re-calibrate their altimeters when they reach a known altitude, such as a trail junction or peak marked on a topographical map. Altitude can be determined based on the measurement of atmospheric pressure. The greater the altitude, the lower the pressure. When a barometer is supplied with a nonlinear calibration so as to indicate altitude, the instrument is called a pressure altimeter or barometric altimeter. A pressure altimeter is the altimeter found in most aircraft. And skydivers use wrist-mounted versions for similar purposes. Hikers and mountain climbers use wrist-mounted or hand-held altimeters, in addition to other navigational tools such as a map, magnetic compass, or GPS receiver. The calibration of an altimeter follows the equation. \displaystyle z=c\;T\;\log(P_{o}/P). Where c is a constant, T is the absolute temperature, P is the pressure at altitude z, and P. Is the pressure at sea level. The constant c depends on the acceleration of gravity and the molar mass of the air. However, one must be aware that this type of altimeter relies on “density altitude” and its readings can vary by hundreds of feet owing to a sudden change in air pressure, such as from a cold front, without any actual change in altitude. ALL my items are GUARANTEED 100% GENUINE, the GUARANTEE is GOOD for “life”. Track Page Views With. Auctiva’s FREE Counter. Add a map to your own listings. The item “Antique Altitude ALTIMETER 1888 British BROAD ARROW Marking by T. Wheeler London” is in sale since Friday, September 01, 2017. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “phillip_in_new_zealand” and is located in Auckland (aprox. 12,000 “clicks” from USA). This item can be shipped worldwide.

• Maker: T. Wheeler Scientific Instruments London UK 1888
• Original/Reproduction: Original
• Balonist Mountain Climber Geographer: Brass Glass Leather enamel face Blued Steel hand

This item is located in Edinburgh Scotland. DATED 1888 and with British Government “BROAD ARROW” that signifies that this Altimiter was once British Government Property and likely produced for a Military Contract. The previous owner advised that he believed that this was USED by the fledgling British Army ROYAL FLYING CORPS who did initially use BALLOONS and later early Biplane like aircraft that would NOT have had a great deal of instrumentation compared to later WW2 era or “modern” aircraft. An altimeter or an altitude meter is an instrument used to measure the altitude. Of an object above a fixed level. The measurement of altitude is called altimetry , which is related to the term bathymetry. The measurement of depth under water. A barometric altimeter, used along with a topographic map, can help to verify one’s location. It is more reliable, and often more accurate, than a GPS receiver for measuring altitude; the GPS signal may be unavailable, for example, when one is deep in a canyon, or it may give wildly inaccurate altitudes when all available satellites are near the horizon. Because barometric pressure changes with the weather, hikers must periodically re-calibrate their altimeters when they reach a known altitude, such as a trail junction or peak marked on a topographical map. Altitude can be determined based on the measurement of atmospheric pressure. The greater the altitude, the lower the pressure. When a barometer is supplied with a nonlinear calibration so as to indicate altitude, the instrument is called a pressure altimeter or barometric altimeter. A pressure altimeter is the altimeter found in most aircraft. And skydivers use wrist-mounted versions for similar purposes. Hikers and mountain climbers use wrist-mounted or hand-held altimeters, in addition to other navigational tools such as a map, magnetic compass, or GPS receiver. The calibration of an altimeter follows the equation. \displaystyle z=c\;T\;\log(P_{o}/P). Where c is a constant, T is the absolute temperature, P is the pressure at altitude z, and P. Is the pressure at sea level. The constant c depends on the acceleration of gravity and the molar mass of the air. However, one must be aware that this type of altimeter relies on “density altitude” and its readings can vary by hundreds of feet owing to a sudden change in air pressure, such as from a cold front, without any actual change in altitude. ALL my items are GUARANTEED 100% GENUINE, the GUARANTEE is GOOD for “life”. Track Page Views With. Auctiva’s FREE Counter. Add a map to your own listings. The item “Antique Altitude ALTIMETER 1888 British BROAD ARROW Marking by T. Wheeler London” is in sale since Thursday, August 17, 2017. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “phillip_in_new_zealand” and is located in Auckland (aprox. 12,000 “clicks” from USA). This item can be shipped worldwide.

• Maker: T. Wheeler Scientific Instruments London UK 1888
• Original/Reproduction: Original
• Balonist Mountain Climber Geographer: Brass Glass Leather enamel face Blued Steel hand

Please excuse my low feedback, t. His is a new account that will eventually specialize in one of my collecting loves, steampunk. Is the title of a novel authored by the originator of the term “steampunk, ” j. Believe in customer service, and answer questions as quickly as. Want to provide you the information you need about. Know how important condition is to you. Please check the pictures closely and ask. Best to list all condition specifics, but.

+made in 1916 by t wheeler, london. +has the british ordinance “broad arrow” mark that denoted a decommissioned piece from the wwi period–may have been used in aviation or naval. +brass casing is in good condition, with only some light corrosion on the sides.

I took a pic of the worst. +bezel has a nicely milled coin edge with a blued metal indicator, and rotates freely as it should. +the hand is also blued metal and matches nicely. +measures approximately 4 1/2″ in diameter and 2″ deep. +flat, beveled crystal looks original and only has a few minor scratches. +fantastic engraved face with the cursive script which is not present in the numbers above no. 1400 that i have seen. +packed very carefully with bubble wrap and double boxed.

+a beautiful piece— thanks for looking! Check out my other items! Strive for 100% positive feedback, and will do.

The item “Antique Brass 1916 WWI COMPENSATED ANEROID BAROMETER No. 1318 by T Wheeler” is in sale since Sunday, November 09, 2014. This item is in the category “Antiques\Science & Medicine (Pre-1930)\Scientific Instruments\Barometers”. The seller is “infernal_devices” and is located in Saint Peters, Missouri. This item can be shipped worldwide.