Test & Measurement

40116N, TESTER NCVD p-59992040 59992040

Southwire #: 59992040 Model #: 40116N

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Non-contact AC voltage detector quickly checks for the presence of live voltage on wiring and electrical devices. Features a built-in flashlight for added convenience.

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Features & Benefits

Audible & Visual Detection of AC voltage 100 – 600V
Increased Battery Life: Auto Power Off after 5 minutes of inactivity
Green LED indicates tester is ready for use and flashing Red LED with beeper means voltage is detected
High power rear flashlight and forward-facing flashlight
CAT IV 600V Safety Rating, UL and CUL listed
Low battery self-test: When the batteries are too low for reliable operation, the beeper will beep three times and the green LED will turn off indicating the tester is inoperative

Specifications

Model #	40116N 40116N
UPC #	032886963025 032886963025
Product Height	6.23 15.82	inch cm
Product Width	0.83 2.11	inch cm
Depth	0.99 2.51	inch cm
Product Weight	0.16 0.07	lbs kg
Safety Rating	CAT IV 600V CAT IV 600V

Resources

Tools & Measurement Booklet

40116N Operating Manual

40116N Instruction Manual

Rated 1 out of 5 by JSchmaltz from Absolute trash I’ve had other sensors before that could actually trace a wall. This one didn’t even work on a live outlet! See video

Date published: 2023-01-31

Rated 1 out of 5 by Wick from Everything metallic was shown as having current Everything metallic was shown as having current. Not telling me whether the line has current flowing through it just that it is metallic.

Date published: 2023-02-24

Rated 1 out of 5 by Losthorn from Doesn't Beep This unit has never beeped. Can't find anything in the sparse paperwork.

Date published: 2026-02-14