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Best Non Contact Voltage Tester

A non contact voltage tester is one of the primary tools for any electrician to have. You are going to agree with me in that this tool can LITERALLY be the difference between life and death during an electrician’s job.

A non contact voltage tester is sensitive to magnetic fields around live current and alerts you if a wire is life, when placed against the wire. Using this tool on your equipment before starting work is a great way to ensure that you do not get any unwarranted electric shocks.

There are hundreds of voltage testers available in the market at the time of writing this article. If it is your first time buying one, you may feel a bit confused as to how to select one for your job and which one to trust your life with (Big decision!). I understand this as I have been in your place before. To make the research and selection process easier for you, I have reviewed the most popular non contact voltage testers in the below section and have also mentioned some tips to get you to make the most optimum selection with respect to your job.


My Best Non Contact Voltage Testers List

NameDual range Range LEDSound Alarm FlashlightRating
Klein Tools NCVT-2Yes12-1000 Volts and 48-1000 VoltsYesYesNo4.4/5.0
Milwaukee-2202-20No50 to 1000 voltsYesYesNo4.5/5.0
Southwire 40126NYes100 to 600 volts,
24 to 600 volts
Fluke Voltage DetectorModel Dependent90 to 1000 volts / 200 to 1000 voltsYesYesNo4.6/5.0
Greenlee GT-12AYes50 to 1000 voltsYesYesNo4.3/5.0
FLIR VP50Yes90 to 1000 volts, 24 to 1000 voltsYesYesYes3.6/5.0


Klein Tools NCVT-2 Dual Range Non-Contact Voltage Tester

Klein is one of the popular brands on my website. It produces high quality products and has earned the respect of professionals, including electricians. Their NCVT 2 non contact voltage tester is quite high in standard and comes with the trust of Klein, ensuring that it is a great product to purchase.

The tester comes in yellow and black color scheme. It is a bit larger than the average voltage charger, but this means that it is easier for you to grip it while working. The tester can be turned on by clicking on the red button on top.

The device will immediately start working and if it detects live current, it will make beep sounds and LED flashes. The LED light is quite bright and can be seen even when you are working under the sun.
The tool is quite easy to use and with its prolonged tip you can easily access even the thinnest outlets. As mentioned in its specifications, it has a dual range and can measure voltages between 12 to 1000 volts and 48 to 1000 volts.
The NCVT 2 requires normal AA batteries to work and a single battery pair easily lasts three to four months, if you are using the unit daily.


  • Auto power-off
  • Dual Range
  • 12-1000 Volts and 48-1000 Volts
  • Automatic detection
  • CAT IV 1000 Volt rating
  • Durable
  • Pocket clip


  • Slightly bulky
  • LEDs reported to flicker


Milwaukee 2202-20 Voltage Detector with LED Light

Milwaukee is an American hardware tools manufacturer. It is a popular choice of several electricians and I understand why, considering its products are of high quality and quite durable. The company has a range of non contact voltage testers and I found the 2202-20 to be the best one from them all.

The 2202-20 voltage detector has the Milwaukee signature red and black color scheme, on a robust ABS plastic body. It comes with a LED light and looks quite simple, but is very practical at doing its jobs without any frills. When put near a voltage source and activated by pressing the rear button, the LED shines very brightly to indicate live current. The LED has a red color and is easily visible. Besides the LED warning, there is also an audible being alarm to make you aware of live current.
The voltage tester is quite easy to use and has a thin metal probe to conveniently check outlets, without awkward trying to angle it in. The specified range of detection for this tool is between 50 to 1000 volts and it is rated CAT IV 1000 volts. You will need a pair of AAA batteries to run the tool and might require to replace it every six months, if you use the unit regularly.


  • Good alert system
  • Easy to use
  • Easy to handle
  • Highly durable
  • Ideal for dark environment
  • Pen clip


  • Sensitivity issues
  • Not the fastest



Southwire Tools & Equipment 40126N NCV Dual Range Pen Type Detector with Flashlight, 24-600V AC

Southwire is a leading manufacturer of industrial and electrical machinery and OEM products. It has grown incredibly since it was founded several decades ago, and now is seen as an authority brand by several electricians.

The 40126N non contact voltage tester is one of the fine options in the company’s list of voltage testers. It has a unique brown and black color body, which makes it stand apart from other detectors in this list. The plastic body is incredibly robust and has been designed ergonomically to allow you to use the tester without losing grip.
The device has a bright LED that shines in red color when it detects a voltage signal, along with a pulsating beeping sound, that is bound to be recognized by you, even in a busy environment. You can start it by pressing the power button on the neck of the tester body and bring the device near the wire / outlet you want to test. It can detect voltage between 100 to 600 volts almost immediately and comes with a dual range of 24 to 600 volts to also detect low voltages in devices such as thermostat. You can use this unit for testing outlets, wirings, breakers, bulbs and anything else that you may encounter during your job.
One great add on that I found in this tester is that it has a flashlight embedded in it. This is pretty handy for electricians, especially in case of the professional flashlight malfunctioning.


  • Quick
  • 100 to 600 volts
  • 24 to 600 volts
  • Dual range
  • Built-in flashlight
  • Flashing red LED and pulsating beeper


  • Sensitivity issues


Fluke Voltage Detector, 1000V AC Voltage

Fluke is a premier manufacturer of electrical hardware and tools. They are extremely popular with electricians and I am certainly a big fan of their products. After having used several of their tools, I have come to an understanding that they are all reliable and innovative.

The Fluke non contact voltage tester is made from strong plastic, which can take on a few drops without showing any marks or breakage. It comes in a yellow and black color scheme, much like the Klein product I reviewed above.

The detector has a pair of LEDs inside the tip that signal you, depending on the presence of voltage. When you press the start button on the mid rim of the tool and put it against a live wire, the tip will glow red and a beeping sound will be released. While not in use, the tool produces random LED flashes to signal that the battery is charged and the device is working properly. The pen like device will make sure that you are made aware of the potential danger while at work.

After unboxing the voltage tester, you will be required to charge the device to get it running. It uses an inaccessible AA battery to power itself. The model can check for voltage between the range of 90 to 1000 volts or 200 to 1000 volts (dependent on model), which is more than sufficient for most electricians. The manufacturer warranties that the battery will last for two years minimum and shall replace it if it fails before this period.


  • Voltbeat technology
  • Tip glows and beeper sounds
  • 90 to 1000 volts / 200 to 1000 volts
  • CAT IV 1000 V
  • Yellow color with high visibility
  • 2 years warranty


  • Replacing the battery difficult
  • Need to find a sweet spot for optimum working


Greenlee GT-12A Non-Contact Voltage Detector

Greenlee is one of my favorite American manufacturer for electrical equipment. Its GT non contact voltage tester series is a trending one amongst electricians. I have chosen the GT 12 A as my fifth pick for this list. Let’s see what makes it special.

The GT 12A voltage detector has a black and green plastic body. It has a compact design and easily fits most hand grips.  The device comes with LED flashing and an alarm mechanism to alert you, when it detects live current.

However, the alarm mechanism can be switched off if you want to work quietly. This is a feature that is not commonly found in most voltage testers.

The tool automatically checks if it is working properly every two seconds, through a patented Greenlee verifying system. It is a smarter device than most listed on this list and can turn itself off after five minutes of no usage, to conserve battery charge and extend battery life. (Two AAA batteries included in the pack).

The tester can check for voltages between the range of 50 to 1000 volts. It comes with a CAT IV rating and has a lifetime warranty.


  • Automatic self test
  • Bright leds flash
  • Audible alarm
  • Silent mode
  • Safe
  • Automatic shut off
  • Lifetime warranty


  • Bulky
  • Battery hogger


FLIR VP50 Non-Contact Voltage Detector Plus Flashlight

The FLIR VP50 is the last non contact voltage tester in my list. I chose it because of its outstanding customer feedback and reputation, both online and in the hardware stores around my block.

The FLIR VP50 is a heavy duty voltage detector. It comes in an all black plastic body and feels very sturdy. In fact, it can take drops of up to three meters, without showing any signs of breaking.

If for some reason, your VP50 breaks within this distance, the company will replace it with a new one for you. The unit is quite easy to put to use once unpacked. Just put in the 2 AAA batteries and power it on. When it detects a voltage source, the device will alert you by flashing red LED light on either ends, releasing high pitched beeps and producing tactile vibration. With all these in motion, there is little chance that you can miss the presence of live electricity.

The voltage detector can check for two ranges of voltages, which are 90 to 1000 volts and 24 to 1000 volts, to allow you to test both low and high voltage systems. The manufacturer has upgraded the sensitivity and prolonged the probe, compared to previous generations of the product, which allows you to detect voltages quickly and stay safe at all times.

Besides the in job uses of this device, it also comes with some sweet add-ons such as slip resistant grip, anti-roll casing a flash light.


  • Cat iv 1000v
  • Vibration and red led alarms
  • High/low sensitivity modes
  • Flashlight
  • Slip resistant grip
  • Anti-roll casing
  • Limited lifetime warranty


  • Delay having to hold the button for testing or light
  • Sensitivity issues


Who Should Get A Non Contact Voltage Tester

All electricians must get themselves a non contact voltage tester. It is as simple as this. It does not matter if you are doing small scale or large scale jobs, if your work involves electricity, you must get this tool in your tool bag.
As you will learn, this is not an expensive device to own and as long as you get yourself a reliable model, you can use it for a couple of years without any worries.


How Did I Chose The Best Non Contact Voltage Testers

As I mentioned in the start, there is a great variety of voltage testers in the market. Therefore I had to make a solid procedure to decipher between these options and shortlist the best ones. Generally, most non contact testers work with only the standard voltages, but there are some which have dual ranges for greater versatility and flexible usage. Therefore, I decided to give preference to the testers with dual ranges.

Since all the testers are usually under 25 dollars, it really did not make a difference to priorities dual range testers. However, I have also covered standard voltage testers as well for the ultra-purist electricians.

I surveyed the products on online and offline market places and made a list of testers which had great customer feedback as well as outstanding specifications. From there, I narrowed my list and eliminated any similar products. Eventually, I was left with six excellent non contact voltage testers.

I tested these six testers at my home to see if the specified functionalities were actually on point or not. If you have read my previous reviews on this website, you would be aware that I like to get my products checked on hand by professionals and the non contact voltage testers were given the same treatment.

After getting the feedback from the professional electricians, I was quite satisfied and confident about my list.



I have now wrapped up with my list of best non contact voltage testers. While this is definitely not an exhaustive list, it does cover up the most popular products in the market and allow you to directly choose from within the best instead of wasting time in personal research or by trial and errors in purchasing.  All the products I have chosen are from reputable brands and can be picked with complete confidence.