ارت سنج کلمپ UNI_T UT_278A 
                                
                                
                                
                                
                                
                                
                                    - UT270 series is widely used in earth ground and circuit resistance measurements of electric power, telecommunications, meteorology, oil field, construction and industrial electrical equipment.
 - It can measure the ground system of the circuit without disconnecting grounding wires, auxiliary electrode.
 - UT278A can also measure leakage current and neutralline current of earth ground system.