The 4 Best Non-Contact Voltage Tester Reviews In 2018

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.

Top Non-Contact Voltage Tester 2018

NameMain FeatureEditor's ScorePrice
Klein Tools NCVT-1 Bright LED A++ Check Price
Klein Tools NCVT-3 LED bar graph and buzzer A+ Check Price
Fluke 1AC-A1-II VoltAlert Dual indication system & LED A+ Check Price

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.

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.

Best Non Contact Voltage Tester Reviews

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

Fluke 1AC-A1-II VoltAlert Non-Contact Voltage Tester

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

Check Price on Amazon

2. Klein Tools NCVT-1 Non-Contact Voltage Tester

Klein Tools NCVT-1 Non-Contact Voltage Tester

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

Check Price on Amazon

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

Klein Tools NCVT-3 Non-Contact Voltage Tester

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

Check Price on Amazon

4. Sperry Instruments VD6505 Adjustable Non-Contact Voltage Sensor

Sperry Instruments VD6505 Adjustable Non-Contact Voltage Sensor

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

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.

David Rodriguez

David has been working with tool for last 7 years. This resource from his work experience with tools. In his personal life, he is the father of one child.

2 thoughts on “The 4 Best Non-Contact Voltage Tester 2018

Leave a Comment

Pin It on Pinterest

Share This