Porthole Barometer Brass

Meridian Zero Porthole Barometer - Medium - Brass
Barometers made of solid unlacquered brass with an opening latch and beveled glass. The barometer has an adjustment mechanism, because in addition to changes associated with weather patterns, barometric pressure also changes with altitude - decreasing the higher you are.
It is necessary to adjust your barometer by turning the screw on the back.
A barometer should be placed with good airflow around it, not by an air conditioning unit or heater.

Measure
• Rear flange diameter 220mm
• Diameter of board 144 mm