microbarograph
/ˌmaɪkroʊˈbɛrəˌɡræf/
noun
- An instrument that records very small changes in atmospheric pressure over time.
- A microbarograph can reveal tiny pressure variations caused by wind or passing weather fronts.
- The microbarograph at the observatory detected the pressure wave from the volcanic eruption.
- Researchers used a microbarograph to track infrasound from distant thunderstorms.