UT13A/B is a non-contact inductive electroprobe. It is of new appearance, safe,reliable and high sensitive. The AC voltage induction range of UT13A isfrom 24V to 600V. The AC voltage induction range of UT13B is from 50V to1000V. It is applied to judging whether conductorsare conductive. It is not only the necessary inspection tool of factory andhome but also smelting,electron,communication,manufacture,fossil oil,national defense,electric power,chemical engineering and colleges. It is the ideal tool ofmaintaining circuit and electrical equipment.