The method of this invention provides a means for altering commonly available inductive voltage detector instruments into dual sensitivity test instruments. By shielding the sensor probe with a metallic material, the probe is made to be unresponsive to energized conductors in near proximity when the...http://www.google.de/patents/US6259243?utm_source=gb-gplus-sharePatent US6259243 - Method for electromagnetically shielding inductive voltage detectors
