Feature

●Applications: Empty box barometer is used to measure atmospheric pressure at the time, such as middle school physical education, weather observations, etc
●Operating Principle: The empty box barometer is an empty box group that moves in the axis according to the change of atmospheric pressure. Pointer passes through the pull rod and transmission mechanism to indicate the current atmospheric pressure
●Size: 15cm x 8.5cm /5.9" x 3.3"

Description