Precision Aneriod Barometer

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Fischer Precision aneroid Barometer 103PM

To all barometer experts, this Fischer aneroid Barometer is among the very best aneroid barometers ever made, worldwide. 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.

Features Size

Case 160mm Across

Dial 130mm

Depth 80mm

  • Precision aneroid barometers are used for measuring accurate values of the absolute atmospheric pressure.
  • Its precision double needle removes parallax error in reading.
  • Fischer barometers have been used at sea by professional mariners, navies, and weather services worldwide for over 70 years.
  • The new dial showing both mb and inches of mercury has been custom made for American and British users.
  • A certificate of accuracy is provided with each instrument.
  • Each has a unique serial number on a metal plate on the top of the instrument.

What is Barometric Pressure?

Pressure and Weather
Due to the gravity earth is surrounded by a mantle of air (atmosphere). The static pressure that acts to the surface of the earth is called atmospheric pressure. Because of variable warming of the different latitudes, formation of the continents and seas and motion processes in the atmosphere the atmospheric pressure is uneven. The global mean value of the atmospheric pressure at sea level is 1013.25 hPa. In Central Europe it varies mainly between 990 and 1040 hPa.

What materials is it made of?
  • The self-stabilized (eigenstabil) set of five aneroid capsules used in this precision instrument is made of a corrosion proof copper-beryllium-alloy. This alloy has been well established for measuring atmospheric pressure for many years because of its remarkable elastic properties.
  • Built to last
  • The aneroid capsules are essentially 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 bi-metal 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 axis of the pointer by driving a geared sector and wheel with high precision gearing.
  • All bearings also has an have excellent high precision finish.
  • The instruments have the minimum possible internal friction because of the advantageous shape of the levers and bearings.

Why choose a Fischer Aneroid Barometer?

Mechanical (aneroid) barometers have been used on land and sea continuously since the mid 1800s. By the 1960s, precision aneroid barometers were fully developed and available from selected dealers. Navies and weather-service vessels worldwide rely on these aneroid instruments daily. Mariners have historically cared only about pressure trends (up or down, fast or slow).



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