Filter by Product All MULTIMETER CLAMP METER INSULATION TESTER EARTH TESTER POWER METER LOGGER INSULATION TESTER All ANALOG INSULATION TESTER ANALOG INSULATION / CONTINUITY TESTER DIGITAL INSULATION / CONTINUITY TESTER HIGH VOLTAGE INSULATION TESTER MULTI FUNCTION INSTALLATION TESTER PV INSULATION EARTH TESTER EARTH RESISTANCE & RESISTIVITY TESTER What does a low insulation reading mean? t means insulation damage or moisture, which could cause leakage current or short circuit. If you cannot find the answer on the FAQ pages, please contact us from here.