Low voltage, 12 - 48 V, electrical tester in the form of a knife has a diode encased in the handle that lights up when the knife is placed in contact with a conductor that is carrying a current

摘要

Knife comprises a diode encased in its handle. The diode is in contact with the mounting ferrule for the blade. To test if a current is flowing the user applies the blade to a conductor or wire and if the diode lights up a current is flowing. If not current is flowing the diode remains unlit.