Usoro electromagnetic flowmeter JEF-300 nwere ihe mmetụta na ihe ntụgharị.Ọ dabere n'iwu Faraday nke induction electromagnetic, nke a na-eji tụọ ụda olu nke mmiri na-eduzi ya na conductivity karịrị 5μs/cm.Ọ bụ mita inductive maka ịlele ụda olu nke usoro ihe na-eduzi.