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Non-contact and plug-in testers
4 products · 2 guides
Outlet and GFCI testers compared: Klein's RT250 shows voltage and GFCI trip time, the RT210 shows lights. What each can and can't find, and how to test a GFCI.
Updated November 2, 2026Read
Non-contact voltage testers picked by job: Klein's dual-range NCVT3P, the one-button NCVT1P and the self-testing Fluke 1AC II, plus what no pen can detect.
Updated November 2, 2026Read
A pen-style non-contact AC voltage detector that senses 90 to 1000 V AC, glows red and beeps near live conductors, runs a continuous self-test and is rated CAT IV 1000V.
Comes in 4 versions: see which to buy
A basic pen-style non-contact AC voltage detector with a 50 to 1000 V AC range, a red LED and tone alert, and a CAT IV 1000V rating.
Comes in 4 versions: see which to buy
A pen-style non-contact AC voltage detector with two sensitivity modes (12 to 1000 V AC and 70 to 1000 V AC), a built-in flashlight and a CAT IV 1000V rating.
Comes in 4 versions: see which to buy
A three-light plug-in tester for standard and GFCI receptacles that shows common wiring faults and has a button to trip a GFCI.
Comes in 4 versions: see which to buy
