These voltage detectors are designed for “proving dead”, making sure that nominal voltage is actually absent on a circuit in an HV distribution system between 1kV and 69kV (no-voltage verification). The device detects any nominal voltage in a system or station. It makes it possible to avoid detecting induced voltages in order to allow earthing operations The visual indication is visible in all normal working conditions, in sunlight or fog, with a wide angle of visibility and from the side The 100dB sound signal, at 3 ft, is designed to remain audible even in traffic or strong wind, thanks to its acoustic “horn” The device will detect if the line become de-energized It features direct access to the battery and sealed electronics compartment and comes in a metal case.