Non-contact AC voltage detector

A non-contact AC voltage detector is a handheld electrical testing tool used to determine the presence of AC voltage without the need for direct contact with live wires or conductors. It provides a quick and convenient method for identifying the presence of voltage in electrical circuits or outlets. The non-contact AC voltage detector operates based on the principle of capacitive coupling. When brought near an energized conductor, the detector's sensing tip detects the presence of an alternating electric field and provides an indication to the user, typically through a visual or audible signal.