In general, most barometers cannot be fixed or are too dangerous to fix. Aneroid barometers can occasionally be fixed if the beryllium and copper capsule is replaced in the unit.

Why do barometers stop working?

A barometer uses water, air, or mercury to measure atmospheric pressure (or weight of the air). ... If it is screwed too tightly the adjusting screw will prevent the mercury from falling when pressure falls, and only works when pressure increases.

How do you tell if a barometer is broken?

Hold the instrument at the 45-degree angle and check the the level of the mercury in the glass tube with a long "stick" barometer. If the barometer is working correctly, the mercury inside will rise quickly to fill the very tip of the tube, leaving no air bubble.