Liquid cooling has moved from the plant room to the rack. To keep AI and HPC servers within their temperature limits, operators now run coolant straight to cold plates on the processors, or sink whole servers into tanks of dielectric fluid. The flow meters on the facility’s chilled water usually can’t follow it there. Most are magnetic meters, and a magnetic meter only reads liquids that conduct electricity. Dielectric fluid doesn’t conduct by design, and deionized water barely does. If you need flow data on those loops, you need a Coriolis meter. This article covers which coolants need which meter,