[Vortex Flowmeters VY series] Is there any issue if a vortex flowmeter is installed in a vertical pipe with the flow direction from top to bottom?

Most flowmeters cannot accurately measure flow unless the inside of the sensor is filled with fluid. Although a bottom-to-top flow is preferable for installation, if it is unavoidable to install in a top-to-bottom flow location, be sure to take care to ensure that it is filled with fluid.