Fortin Barometer

The Fortin barometer is simple to use as it has a clear easy-to-read linear scale. These barometers can be mounted on a wall or suitable pillar.Fortin barometers can be moved without risk of damage but should always be carried flat or upside down. If a Fortin barometer is to be moved after installation, the following procedure must be followed: turn the adjustment screw until the mercury fills the reservoir and the mercury in the column is about 25 mm from the top of the scale. Remove the barometer from the wall, incline or tilt gently and then place in a flat position. Finally, adjust the screw further until a small air gap is left in the reservoir. The re-hang the instrument, reverse this procedure.