Maker

Mechanism Ltd, Croydon, U.K.

Model

Type 2016

Serial Number

271/61

Dimensions

150 x 126 x 115 mm

Image

Description

Precision aneroid barometer with electronic pressure point detection and readout on a mechanical counter. Least count 0.1 mm Hg, estimate to 0.01 mm Hg.

The original cathode ray tube indicator was replaced by a red/green diode indicator (designed by the Electronics Laboratory of the School of Surveying) running off an 9 V battery . The side panel with the specification plaque can be removed to attach/detach the battery.

The device originally required two 30 V (hearing aid) batteries (in series) and one 1.4 V battery. The instruments were supplied with calibration charts over the pressure working range, for 20 degree and 35 degree temperatures.

Swiss Patent No. 342011, British Patent No. 816073

Range: 675 to 800 mm Hg

History & comments

Used for barometric heighting and for pressure measurements during (precision) electronic distance measurements.

Conservation

in wooden box with handle: 195 x 170 x 170 mm

Condition

some paint damage, the outside of the case is worn.

Remarks

This barometer design was later marketed by BAROMEC. A manual can be ordered from www.royalsignals.org.uk.

Box marked M5 and PC(plant card) 3079

Dates

Catalogued by JMR in 2012. Photo by JMR.