EC TesterContact Us to PurchaseFeatures Compact and portable pen-type design. Easy to use and give instant results. High stability. Waterproof surface. Specification Model Type Spec Remark EC-0172-4 electrical conductivity (EC) tester meter 9V, range 0-20.0 EC Application Suitable using in water from tap water, bottled water, filtered water, drinking water(RO or ionizer water), farm, aquarium, fish farming...etc.