High voltage detectors UVN80-2M/1-C, UVNU-2M/1-C with LED indication are used for checking presence or absence of voltage in AC and DC electrical installations with nominal voltage from 6 up to 10kV. The detectors works without earthing of any its part in all electrical installations. The distinction of these devices is minimal energy consumption from built-in power source. UVNU-2M/1 detector have built-in self checking device.