ارت سنج UNI_T UT_521 
                                
                                
                                
                                
                                
                                
                                    - UT520 series earth resistance tester has the functions of backlight display, low battery display, data hold, data storage, auto power off and power saving.
 - It can not only be used for accurate three-wire measurement but also simple two-wire measurement.
 - It is applicable to measuring the earth resistance of all kinds of electrical power system, electrical equipment and anti-thunder equipment.
 - It can also measure the earth voltage.
 - It is applicable to testing operating earth systems of smelting, communication, manufacture, fossil oil, national defense, electricity, chemical industry and construction.