Precision, which scans hairspring; precise wet spiral; precision gearbox structure barometer movement; 1 second precision clock; metal pointer.
❤Comparison of measurements: The contrast pen on the lens is used to compare the measurements to determine if the atmospheric pressure rises or falls down over a certain period of time.
Wide applicability: can be used on ships, factories, laboratories, families.
Easy to install is light and easy to install, suitable for hanging or placed on a surface.
