The 10 Best Non Contact Voltage Tester [2023 Reviews]

If you are an electrician and are doing various kinds of electrical maintenance works, then a non-contact voltage tester becomes the primary and most essential tool to have in your gadget bag.

You may be wondering that why it becomes such important and why we are discussing this.

Why is Non-Contact Voltage Tester Necessary?

As we said earlier, it is a life-saving device for electricians. Whether you are an electrician or just making simple electrical repairs in your home,

Sometimes this is the thing that separates life from death, as it can detect voltages and provides an indication that a wire or an object is carrying current.

With this device by your side, you can quickly look for the faulty part in the circuit and make necessary changes, to assure its working. Also, these devices are very safe and easy to use such that it can be used by anyone in simple household projects.

In a Hurry?

Klein Tools NCVT-2 Dual Range Tester will be a great fit for you.

How Does Non-Contact Voltage Tester Work?

Well, this is the obvious question which most of you are having, let’s answer it first then we will discuss other this.

This tester works on a simple physical phenomenon which each and everyone one of you has studied back in school that “a current carrying conductor creates a magnetic field around it.”

The sensors inside the tester interact with the present magnetic field around an object and give an indication that whether or not any voltage is present or not.

The sensors are well calibrated to indicate voltage even though the conductor is buried under several layers of insulation.

How to Use Non-contact Voltage Tester?

Do you Need One in Your House?

Even though you have zero interest in electronics, this tool may always come in handy to replace a faulty electronics or replacing dimmer switches.

Also, if you are in a new house, it can help you map your breaker circuit box, in case if it is not labeled. Beside costs only a few bucks and has a long warranty so going by my experience and opinion, every house must have this magical tool.

And just in case you are a professional electrician you should have at least two of them, one for the work and another one as a backup if the primary gets damaged or starts malfunctioning.

Where are the Possible Applications of this Device?

Well, there are a lot of places where you can find the application of the testers; some of the most common use are listed below.

  • Testing switches and receptacle: It is very useful if you want to test that whether power is available at a particular wall socket or switch. Now you don’t need to test it with a small electrical appliance such as a bulb or fan, instead just insert its tip inside and you will come to know whether the voltage is available or not.
  • Replacing Switches: This device is very much helpful to confirm that you have turned off the appropriate circuit breaker if your breaker boxes in not mapped correctly. Thus it helps in avoiding the accidental electrical hazard.
  • Fixing open end wires: Let suppose that you came across an open end wire in your home. Before you start to fix that cable, the tester will get confirmation that whether power is flowing through it or not.
  • Troubleshooting power strip: Sometimes one or more power strips/outlets are not working properly; before you start diagnosing them you can check that whether the strip is receiving the power in the first place or not.
  • Patching broken wire: When it comes to internal wiring, all the power cables are twisted together to minimize interference with the communication devices. So if the cable breaks internally, it becomes quite difficult with conventional detectors to find it but the help of Non-Contact voltage detectors you can easily locate the fault just by running it over the wire.

There are many other uses of this magical electronic gadget(Non-Contact Voltage Tester) which we will be discussing at some other point in time.

Features of a Best Non-Contact Voltage Tester

If you are going to buy a Non-Contact voltage tester, there are certain standard features which you should look at before selecting the proper model for yourself. Some of the notable features are mentioned below.

  • Design: These devices are made compact and slimmer such that they easily fit in your pocket and can be carried away anywhere. Such a design ensures high portability and easier operation. Most of these are made from thick plastic which makes them durable. There should be a tight tip attached to tester such that you can clip it in your pocket and do not lose it.
  • Functionality: Always look at the way in which device functions, most of the devices get started upon pressing the power button. Now to check the current or voltage presences on any surface just press the tip against that surface. The will start glowing indicating the presence of voltage.
  • Indication system: Most of the regular systems incorporate a LED which glows to give a warning of the available voltage. But there are few in which an additional buzzer has been used which keeps beeping to give signs of present voltage. A system with two or more indicator is better one of them may get damaged anytime.
  • Range or compatibility: These devices are designed to work with AC electrical system and can easily detect a voltage anywhere in the range of 90V to 1000V, which is good enough for domestic as well as professional usage.
  • Battery option and life cycle: Well all of these devices work on battery. Most of them utilize tiny watch batteries as their power source whereas son of them uses AAA battery. So you are free to choose according to your convenience and battery life.
  • Price: A conventional non-contact voltage tester starts from few bucks and can go hundreds of dollars depending on the functionality. There are other individual features which we will have a look as we see specific products.

10 Best Non Contact Voltage Tester Reviews

#1. KAIWEETS Sensitive and Adjustable Non-contact Voltage Tester


Whether you have used a non-contact voltage tester before or not, this model has a very straightforward design that makes it easy to use.

The tester detects the presence of voltage by just placing the tip of the tester near the target terminal or cord. In case there is voltage, the pen responds by glowing red.

However, since sometimes you may fail to see the light especially when operating in a bright environment, the pen also beeps to alert of a live wire and produces a buzzer alarm when dealing with a null wire.

The visual voltage indicator presents readings using up to eight bar graphs that are easy to read and interpret.

Like NCVT-2 Model, this non-contact voltage tester handles both the standard voltage and the low voltage (12-1000AC/48-1000AC), making it the staple addition to your gadget bag.

The adaptable design allows you to adjust the tester for low voltage testing by simply pressing the S button.

Kaiweets Sensitive Non-Contact Voltage Tester utilizes an efficient design that comes out clearly in the auto-shutoff feature of the sensor when left unutilized for three minutes.

The battery-powered piece also alerts you when the battery is insufficient so that you can know when it’s time to replace the batteries.

Highlighted features:

  • It tests both standard and low voltages.
  • It presents the voltage in a graph.
  • It uses both visual and audible notification.


  • It is very easy to use.
  • The price is good.
  • The sensor auto-shuts when left idle.


  • The clip is too tight.

Check Price On Amazon

#2. Fluke 1AC-A1-II VoltAlert Non-Contact Voltage Tester

Fluke 1AC-A1-II VoltAlert

If you are electronics guy then there is no need to give an introduction for Fluke, it’s the premier supplier of electrical gadgets and is known for its high-quality equipment.

The reason for being the first choice of users across the globe is it’s reliable and top of the line products.

This non-contact tester is no different and is the perfect example of fluke’s craftsmanship and latest technology.

It is carved out of thick and durable plastic with Fluke’s traditional yellow and gray color combination.

It has a more compact and sleeker design which makes it stand out from rest of the gadgets. The tester can be activated by pressing the green start button, and you can start your routine. The tester features a dual indication system comprising of an led and a little buzzer.

The tip glows red to show the presence of voltage, and the siren makes a beeping sound, which is quite loud to get unnoticed. The device is compatible with a large voltage range and depending on the model you select it can even detect the 20V – 90V range.

It comes in five different models; the primary model can detect a voltage between 90V- 1000V AC. So you know it’s durable. It’s powered by internal batteries which are non-rechargeable and user replaceable.

Highlighted Features

  • Features dual indication system; sound and LED
  • Performs periodic self-test, checking battery and electronics
  • The battery can last up to one year


  • Non-conducting outer surface
  • Compact, fits in your pocket
  • Easy to use


  • Not drop safe
  • The battery could be a bit strong

No products found.

#3. Klein Tools NCVT-1 Non-Contact Voltage Tester

Klein Tools NCVT-1

Ok, I am myself surprised with the number two ranked product on our list, but has rightly earned its spot.

Although Klein is known for its high quality and top of the line professional tools all over the world, still they have developed a high standard product at a better price.

Thus they gained the trust of experts electricians all over the globe by creating electrical equipment which is trustworthy and durable.

The Klein Tools NCVT-1 Tester is made from lightweight and durable polycarbonate plastic resin, which makes it strong enough to withstand a fall from a height of 6 feet. The tester is slightly thicker than the Fluke mode which makes it easier to hold in hand while working.

Its working mechanism is similar, but it has a better voltage profile and can detect a voltage ranging from 50V to 1000V. The tester features a sturdy clip which makes sure that it stays securely in your pocket.

The tester is powered by two AAA batteries which can be replaced by you. It also has a battery and shutdown indicator which is controlled by a microprocessor.

Highlighted Features

  • Can detect smaller voltage as low as 50volts
  • Can withstand a 6 feet drop
  • Dual indication system to indicate the presence of voltage
  • The LED is bright enough to be seen in daylight


  • Non-conducting outer surface
  • Drop safe
  • Easy to use


  • It’s not as compact as other models

No products found.

#4. Klein Tools NCVT-3 Non-Contact Voltage Tester

Klein Tools NCVT-3

Klein has taken everyone by surprise and has caught many electronics companies off guard with a whole lot of electronic instrument.

The company is well known for making best quality products and has kept its promise to deliver quality products with innovative features.

The Klein Tools NCVT-3 Non-Contact Voltage Tester can be used as the best example for above said. When you are looking for a non-contact tester with standout features, this becomes your ideal choice.

It features dual voltage indicators and has an improved voltage profile, which can detect low voltages as 12V to large 1000V.

The tester features a five led bar graph indicator whose LEDs lit up in proportion to the voltage sensed or closeness to a voltage source.

Also, it features a strong flashlight which comes in handy when power cuts off suddenly while working, this flashlight can be used independently with regard to the tester.

The frequency of alarm is in correspondence to the sensed voltage. This tester is dust and waterproof and made from an IP67 panel.

It also drops safely from a height of 6.6 feet and features an auto shutdown to conserve battery.

Highlighted Features

  • Can detect smaller voltage as low as 12 volts
  • Can withstand a 6.6 feet drop
  • LED bar graph and buzzer, which is proportional to the voltage sensed
  • Features an independent LED torch


  • Non-conducting outer surface
  • Drop safe
  • Easy to use
  • LED flashlight


  • Too sensitive for a crowded box
  • Cannot be inserted directly into sockets

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#5. Tacklife Non-Contact Voltage Tester with Adjustable Sensitivity


If you thought that for you to get a quality non-contact tester you have to break the bank, this is one of the options that prove that you can still get a combination of great quality and good price.

To test for voltage, simply point the object you want to examine from a close distance using the sensor end and the detector will trigger the buzzing alarm and red warning light when the test is a live wire.

In case the tested cord is a null wire, this detector signals using a green flashlight and a slow-paced buzzer alarm.

Therefore, even without having to look at the screen, it is easy to tell whether the test is live or null wire by just paying attention to the pace of the alarm.

The HD LCD Screen of this tester indicates the voltage intensity through the brightness bar and lights up in red/green color to distinguish live/null wire.

The screen also shows you when the battery power is insufficient to let you know when its the right time to replace the batteries.

The Tacklife VT02 comes as an improved version and only retains two buttons. Of the two, one is the power button while the other button allows for sensitivity adjustments when still doubling up as the LED light button.

The two buttons make using the tester a cinch even for the first-timers.

Highlighted features:

  • It only has two buttons.
  • It uses sound and light alarm mode.
  • It has auto shutdown functionality.


  • It is affordable.
  • It is easy to use.
  • The screen is easy to read.


  • The instructional manual is not clear.

No products found.

#6. Sperry Instruments VD6505 Adjustable Non-Contact Voltage Sensor

Sperry Instruments VD6505

This Non-contact voltage tester from Sperry in one of the most versatile testers designed for professionals.

It is one of the must-have components in any electronic toolkit and is carefully engineered to specifications for professional electricians who work in the closet and require more precision while working.

This unique tester features a sensitivity dial which can be used to change the adjust the voltage profile of the tester.

This tester can detect AC quantity of magnitude anything between 12 volts to 1000 volts.

It provides both audios as well as a visual indicator to show the presence of voltage; the red LED is 360 degrees mounted.

It features a patented battery checking mechanism which is designed to check proper working of battery and tester.

The tester is fully insulated and avoids contact with live wires while testing. It has a 250lbs crush rated impact resistant ABS along with protective rubber over mold to make it drop safe.

Also, it features pocket clip for safe and secure fit in your pocket.

Highlighted Features

  • Can detect smaller voltage as low as 12 volts
  • Can withstand a 6.6 feet drop
  • Works on single AAA battery


  • Non-conducting outer surface
  • Drop safe
  • Easy to use
  • Sensitivity dial to adjust the sensitivity


  • Too sensitive for a crowded box

Check Price On Amazon

#7. Klein Tools NCVT-2 Dual Range Tester

Klein Tools NCVT-2

This non-contact tester is among the few options you may rely upon when addressing any electrical issues. The tester comes with a similar design to other competing models although the NVCT-2 Dual Tester is quite large to offer a better grip.

Majority of the electricians who have interacted with this tester appreciate the very bright LED lights which make it easy to read even when operating in an environment with good lighting.

The green LED lights also help to illuminate your workspace when operating in dark areas or poorly-lit areas.

NCVT-2 is a dual-voltage tester. In other words, the professional-grade tester can handle two ranges of voltage and can be used for detecting voltages as low as 12V up to 1000V.

Therefore, we can say that this tester comes with versatility in mind since with this range you can use it for registering standard voltage such as home wiring projects as well as for low voltage applications such as doorbells, telephone network, and thermostats.

The tester features the polycarbonate plastic resin construction. This construction makes the tester highly durable when still maintaining a low weight for easy portability.

The bright red clip is a standout and attaches to your belt or pocket for easy transportation and convenient access.

Highlighted Features:

  • It has a detecting range of 12-1000V.
  • It has green LED lights.
  • It has a handy red clip.


  • It suits a wide range of uses.
  • It is easy to handle.
  • It has an automatic shut-off.


  • It can sometimes be oversensitive.

Check Price On Amazon

#8. Milwaukee 2202-20 Voltage Detector with LED Light

Milwaukee 2202-20

Milwaukee remains one of the most trusted manufacturers when it comes to making safe and reliable tools that are easy to use.

Therefore, in case you have never used a non-contact tester before, or maybe you have but want one that is simple to use, this should be a good option for you.

The product has a rear push-button design for ease of use as compared to other non-contact testers of its class.

The tester adopts an ergonomic design that provides the user a better grasp than most products of the same class and price.

Also, it has a very durable construction that can stand up to the abuse in a busy job site for years and still come out in great shape without compromising the integrity of its functionality.

The extra bright LED will light up your working space so that you will never have to operate in the dark again while the green indicator shows whether the voltage indicator is functioning properly.

The voltage detector responds when voltage is present by producing a red light but also produces beeping sound that grows as you draw closer to the live wire.

Milwaukee 2202-20 Voltage Detector is certified, you can use it with the peace of mind that you are safe.

The pocket clip allows you to attach it to the pocket of your shirt for easy access. The AAA batteries power the unit and are easy to replace when the need arises.

Highlighted features:

  • It as an easy-use rear push-button design.
  • It uses top-class voltage detection technology.
  • It measures six inches long.


  • The LED flashlight is a plus.
  • It is reliable.
  • It does work correctly.


  • It turns itself on and off constantly at intervals.

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#9. Southwire 40150N Advanced AC Non-Contact Voltage Tester Pen

By: Southwire

In case you deal with outdoor projects mostly, this non-contact tester can be a good addition to your tool kit.

The checker pen features a waterproof IP67 housing that has excellent waterproof properties for years of use in the outdoor work sites.

In fact, apart from resisting water, Southwire 40150N can stand up to a six-foot fall.

The option features a handy flashlight at the rear which helps to illuminate your work area when operating in the dark while the other flashlight at the front provides user convenience you will hardly get in other competing models.

Southwire 40150N also features dual detection range that goes from 12 to 1000V and 100 to 1000V, to allow the user to measure both standard voltage and low voltage.

This feature makes it a multi-purpose option, eliminating the need for having multiple job-specific non-contact testers.

When testing the presence of an electric current in a wire, this professional-grade piece produces both audio and visual warning to alert you that the source is live.

Also, most electricians and home DIYers who have used this tester pen love that it has a thinner probe tip since this feature allows them to use it in confined spaces where other models cannot access such as on wall outlets.

Highlighted features:

  • The construction is waterproof.
  • It can withstand a six-foot drop.
  • It has two flashlights; one at the front and the other at the rear side.


  • It is multi-functional.
  • It is very durable.
  • The two flashlights are a real help when working in dark spots.


  • The buzzer is not audible enough.

Check Price On Amazon

#10. Greenlee GT-12A Non-Contact Voltage Detector

by Greenlee

Greenlee GT-12A also packs several exciting features that earn it a spot on our top-notch reviews.

Like most of the preceding models, this piece delivers reliable performance when contacting a non-contact voltage testing.

The professional-grade gadget responds by producing both visual and audio signals when what you are checking has AC voltage.

The detector utilizes the unique self-testing verification technology that checks the integrity of the unit after every two seconds to alert you immediately in case its detection mechanism gets compromised.

The self-test feature implies that it is one of the safest models to use.

The detector runs on two replaceable AAA batteries and has an automatic shut-off feature that switches it off after five minutes of non-use.

The single-button design makes it easy to use since it eliminates the complexity that comes with multiple buttons.

Another adorable trait about this detector is that it can also operate on silent mode, making it an ideal tool for use in areas where silence is need.

And of course, you will still be able to hear the audio alert even when running on silent mode so that you always remain safe.

However, this option reads only the standard voltage which limits its applicability.

Highlighted features:

  • It has a single button
  • It has automatic shutdown functionality.
  • It has a silent mode feature.


  • It is easy to use.
  • The beep is loud enough.
  • The silent mode is an additional feature.


  • The battery cover is quite hard to remove.
  • It does not measure low voltage.

Check Price On Amazon

Frequently Asked Questions (FAQS)

What is non-contact voltage detection?

This is a check done to determine whether an object has an AC voltage or not without having to touch any wires. It allows the user to distinguish between the live and null cords when performing electrical repairs by positioning the sensor near the object that needs to be measured.

What is dual-range voltage tester?

A dual-range voltage tester is a type of tester that allows you to measure both standard voltage and low voltage. Standard voltage is found in things like wall outlets and general home wiring while the low voltage range allows you to detect low voltage in applications such as alarm systems, irrigation systems, communication, and environmental control systems.

Can a multimeter be used as a voltage detector?

Although you can use it, it is not the ideal one for the job since you have to keep on readjusting it depending on the expected voltage in the object you are measuring. Also, multimeters have a limited range since most of them can measure up to 600V, unlike the testers which most of them measure up to 1000 Volts.

How do voltage sensors work?

A sensor of a non-contact voltage tester is located at the tip of the pen. The detector works by sensing the presence of electromagnetic waves which come from sources with voltage. After the electromagnetic waves hit the tip (sensor) of the detector, the unit responds by sending a signal through the circuit to activate the light or sound to alert the user on the live wire test.

How can I tell which wire is hot?

Answer: When using a non-contact voltage checker, you can tell whether a wire is hot (live) or not (null) by interpreting the alert signals. Normally, a red flash may symbolize a hot wire while a green indicator signifies null wire test. However, it is important to read the manual first to understand how to interpret the alarm mechanism of your chosen model.

Final Verdict

So if you are looking to get a new tester, then any of the Non-contact testers on the list could be a decent choice and meet all your demands. Personally,

I prefer Klein Tools NCVT-3 Non-Contact Voltage Tester as it has a flashlight and the LED bar graph & Buzzer work according to voltage intensity or closeness.

Never hesitate to spend some extra bucks to get high-quality products as it will serve you better and longer.

The Team That Worked On This Review

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