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Precision Aneroid Barometer

£1,250.00

Aneroid barometer for measurement of the absolute atmospheric pressure. Precision movement with self-stable set of five aneroid capsules made of a copper-beryllium alloy.

Measuring range 890 to 1050 hPa
Accuracy ± 0.7 hPa
Graduation 0.5 hPa

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 over the whole measuring range and for temperatures between -30 to +40 °C (-22 … 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 of the gearing. All bearings have an excellent fine finish. The Instruments have only got a minimum of idle friction because of the advantageous shape of the levers and bearings.

Case in polished or chromed brass, diameter 165 mm.
Mineral glass cover.

“Fischer aneroid from Germany, with a 5.5″ dial and a 5-cell movement is among the best of the aneroids available today. This instrument has an accuracy of better than +|-0.7 mb over its full working range of 890 to 1050 mb. Fischer aneroids have been used at sea for 60 years.” David F. Burch, PhD, Director of the Starpath School of Navigation Seattle USA

Overall dimension: 160mm Dial: 130mm

Lead time: average 6-8 weeks

SKU: 103pm Categories: Barometers for Sailing, Cast Brass, PRESTIGE Marine Range

Description

Description

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