UNI-T UT502A Digital Insulation Resistance Tester 500V-2500V

The UNI-T UT502A Insulation Tester is a professional-grade tool designed to measure insulation resistance from 0MΩ to 20GΩ at selectable voltages of 500V, 1000V, and 2500V. It also features AC voltage (30V–600V) and low resistance (0.01Ω–200Ω) measurement capabilities. Essential functions include Polarization Index (PI), Dielectric Absorption Ratio (DAR), auto-ranging, high-voltage and overload alerts, automatic discharge, and real-time voltage display. With a short-circuit current under 2mA and 1mA test current, it complies with IEC 61557 safety standards. The tester includes a 70.6mm LCD backlit display, internal 10MΩ resistance test, and intuitive alarms for safety. Its compact 500g build and included accessories—batteries, leads, alligator clips, gallus, and probes—make it an ideal tool for testing transformers, generators, motors, capacitors, arresters, and cables in both industrial and maintenance environments.