Flir vp52 cat iv vibrating non contact voltage detector and flashlight flir vp52 a cat iv non contact voltage ncv detector that is designed to work on the latest tamperproof outlets as well as standard electrical systems the detector has both normal and high sensitivity ranges with a 190 to 1000v or 24 to 1000v range respectively the tester has a built in flashlight and also has an inspection light in the tip that makes it easy to use in dark or restricted areas additional features such