Martindale-IN2103-Insulation-&-Continuity-Tester-with-PI-&-DAR-Martindale-MARIN2103-P-The-Martindale-IN2103-is-the-top-of-the-range-insulation-tester-&-ideal-for-industrial-use-as-well-as-by-users-involved-with-the-repair-&-reconditioning-of-motors-P-P-Two-key-features-of-this-professional-tester-include-polarisation-index-PI-&-dielectric-absorption-ratio-measurements-DAR-These-sophisticated-tests-introduced-by-Martindale-for-the-first-time-in-a-handheld-instrument-all