Eisco Labs Aneroid Teaching Barometer

13cm dial numbered in inches and millibars Exposed aneroid shows change in pressure 28" to 31" of mercury , 960 to 1060 millibars EISCO Aneroid Teaching Barometer (1) Barometer with pump This is a high quality teaching barometer to demonstrate operation. The exposed aneroid shows the change in barometric pressure when you pump the attached bulb. The 13cm dial is numbered in inches and millibars.

13cm dial numbered in inches and millibars,Exposed aneroid shows change in pressure,28" to 31" of mercury , 960 to 1060 millibars