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Internet # 325285937

Model # 59992040

Store SKU # 1009560219

NCV Dual Range Pen Type Detector with Flashlight, 24-600-Volt AC

  • AC Line Splitter: Measure current without cutting cords
  • Auto Power Off: Extends battery life after 5 mins
  • Built-in Flashlight: Illuminate dark areas easily
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Return this item within 90 days of purchase. Read Return Policy
Product Details

About This Product

Southwire 40116N AC non-contact voltage (NCV) pen tester is a valuable addition to your tool bag. Use it whenever you perform electrical work to identify where voltage is present. Detects voltage in wires, light switches, circuit breakers, outlets and light fixtures. Press the On button and the detection tip glows green. Move the detector tip close to the electrical wire or device being tested. If voltage is detected, the detection tip will change from green to red and begin flashing. The NCV will also beep loudly. The 40116N can also be inserted directly into electrical outlets to verify operation. All Southwire non-contact voltage detectors come with a built-in focused LED flashlight so you can illuminate dark areas. Auto power off feature helps conserve battery power. As an added safety feature, the 40116N has a low-battery self test which periodically checks the condition of the batteries. If battery voltage becomes too low, the self-test circuit turn off the non-contact voltage detector until the batteries are replaced. The 40116N is UL Listed. Not designed for use with Tamper Resistant (TR) outlets.


  • Convenient way to measure current: Southwire, ac line splitter allows a clamp meter to measure ac current of plug-in appliances and other electrical devices without having to cut and separate the conductors of the power cord
  • Increased battery life with auto power off after 5 minutes of inactivity
  • Ready for use indicated by green LED
  • Built-in flashlight for added convenience
  • CAT IV 600-Volt safety rating
  • Return Policy
  • California residents
     see Prop 65 WARNINGS

Product Information

Internet # 325285937

Model # 59992040

Store SKU # 1009560219

Additional Resources

Shop All Southwire


Dimensions: H 6.23 in, W 0.83 in, D 0.99 in


Product Depth (in.)

0.99 in

Product Height (in.)

6.23 in

Product Width (in.)

0.83 in


Battery Power Type


Battery Size


Control Type


Display Type


Electrical Tools Features

LED Meter, Portable


No Additional Items Included



Number of Batteries Required


Product Weight (lb.)

0.16 lb



Test Meter Type

Voltage Tester

Tools Product Type

Test Meter

Warranty / Certifications

Manufacturer Warranty

1 year limited

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

4.5 out of 5

  • 4.5 out of 46 reviews
  • 88% recommend this product
Filter by:
Showing 1-10 of 46 reviews
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
    [This review was collected as part of a promotion.] So Im pretty sure I have spent my portion on AC detectors pretty funny how everyone is using yellow except for the Milwaukee that uses red so I like the color of southwire detector I also like that it is longer then the rest sometimes the further you can get from a live wire better many tight spots also enjoy the light at the end it will come in handy what I have seen from most detectors is the power button on the side and I'm always putting my hot stick in my bags and here the chirping so it powers on so I noticed that the buttons on the southwire are not that temperamental so hopefully once I start using this new toy it will not turn on its own I like the light part on the southwire hot stick the light is at the top not at the bottom so that light lenses will hopefully not get scratched the clip looks pretty the same to the rest but the battery compartment was the best it wasn't hard to take off to install battery because the clip is basically two parts so that helped for sure the feel is durable a good thing
      • Recommended
      Great Features
      [This review was collected as part of a promotion.] I am very happy with this non-contact voltage detector from Southwire. I found it to operate on several different gauges of wire in an industrial setting. The flashlight on the opposite end is an outstanding feature. It is very comfortable to use and has a nice rubber molding to keep in secure while in use.
        • Recommended
        Southwire NCV
        [This review was collected as part of a promotion.] I received this in the mail about 3 days ago and since then i have switch between this and the pro. So i do like how it feels in your hand its light and has a really good flashlight. I was able to try it today on a 120v, 277v, 480v and did not have a problem. The beep is very loud and wish it could have the no beep like the pro, but i do like the color change to red when hot. I also was able to drop it from 5 feet and the only thing that happen was the clip broke off. I really do love the flashlight but it's not as bright as the pro but for the money it's good. I give it 4 stars as i do wish the flashlight would turn off when the tester is on as to save battery lift. For the money it ranks right up to others in the same class if not better.
          • Recommended
          Great voltage detector
          [This review was collected as part of a promotion.] I've been using this detector for about two weeks. It works great and has a nice flashlight and plus it has a nice audio or you can go silent mode. It has not gave me a false reading at all. Highly Detector. The only thing I wish it had was the flashlight could stay on and set of just holding the button
            • Recommended
            Great tester with nice features
            [This review was collected as part of a promotion.] Works great! Nice rubber grip on it makes it easy to use with gloves on. Audible tone is nice and loud can hear it in other room. Love the light feature on end of tool and that you can use it with out turning tester portion on.
              • Recommended
              Ncv detector
              [This review was collected as part of a promotion.] Got this new ncv detecter the other day. Works great. flashlight on it comes in really handy. Have pros and cons on the green light that stays on while turned on.
                • Recommended
                • Verified Purchase
                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.
                  Good voltage detector
                  [This review was collected as part of a promotion.] My brother is an electrician and he said the detector was very reliable and easy to use
                    Showing 1-10 of 46 reviews