Precision aneroid barometers are used for accurately measuring the absolute atmospheric pressure, which is vital for meteorology, ocean navigation, industry and research.
The five self-stabilized aneroid capsules in this instrument are made of a corrosion proof copper-beryllium alloy which has long been used for measuring atmospheric pressure because of its remarkable elastic properties. The aneroid capsules are 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 axis of the pointer by driving a wheel with high precision gearing. All the bearings have an excellent high precision finish. The instruments have the minimum possible internal friction because of the advantageous shape of the levers and bearings.
For barometer experts, this is among the very best aneroid barometers ever made wordwide. It is accurate to +/- 0.7 millibars and its precision double needle removes parallax error. It has a range of 890 – 1050 millibars.
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 and each has a unique serial number on a metal plate fixed to the top of the instrument.
Fischer barometers have been used at sea by professional mariners, navigators and weather services for over 70 years.
This instrument is featured in The Barometer Handbook by David Burch
Overall 160mm/Dial 130mm/Depth 80mm