JEF-300 ikurikirana ya electromagnetic flowmeter igizwe na sensor hamwe nuhindura.Ishingiye ku mategeko ya Faraday yo kwinjiza amashanyarazi, akoreshwa mu gupima ingano y’amazi atwara ibintu hamwe na 5μs / cm.Ni metero inductive yo gupima ingano yimikorere yimikorere.