The Pros and Cons of Non-Contact Voltage Detectors

Electricity is an essential component in today’s modern world.  Practically everything that people use runs on electricity, whether it’s a personal computer, a mobile phone or a microwave oven.  With it, everything is made convenient.

However, it’s also something that’s considered dangerous.  One can hear many reports about how some people tried to fix electrical problems in their homes and offices, only to end up being gravely injured or even killed.  The human body is a conductor, one that can be quite fatal depending on the power of the current passing through it.  It’s because of this that normal everyday folk shouldn’t take it upon themselves to deal with electrical problems.  Instead, they should leave it to the professionals, namely electric technicians.

These individuals make use of special equipment such as non-contact voltage testers.  These are devices which can provide utmost protection to electricians who are often expected to come in contact with energized components running on electricity.

It can be pretty difficult to find information from these devices on the Internet, yet they do have their own sets of benefits and shortcomings.  Below are some of the pros and cons of these types of voltage detectors.


  • These testers are quite small in size, often coming in a form similar to that of a rectangular pen.  This makes it easy for electricians to take with them wherever they go to fix an electric current problem.  It can fit in the pocket and is quite light in weight as well.
  • The benefit of such devices is that electricians can be warned whether a loose wire, a cable or even a seemingly non-functioning wall socket has live current running through it.
  • They are also quite affordable, making them easy to come by.  Despite their affordability, they are built in a rugged manner, which makes it possible for them to withstand overloads of electricity a lot better than some testers in the market, thus considered as highly durable.


  • Voltage detectors can emit electromagnetic radiation, which can be quite risky to the well being of all biological organisms, including humans.  Due to excessive use, there have been reports of people suffering from asthma, autism and even leukemia, illnesses which are often connected with electromagnetic radiation emitted by these devices.
  • Such a device may not always present accurate readings.  They may either be false positives or false negatives.  Considering that testers may have different features and settings, they can either be very sensitive in reading electrical current or may not be so accurate at all.  In the case of false negatives, this can be quite dangerous for electricians.  Therefore, one has to make sure that a detector with a specific purpose is used for the situations it was meant to deal with.

These are just a few of the things one can come to expect from non contact voltage detectors.  Despite their effectiveness, there is still some risk to be encountered, which is why choosing the right voltage detector is highly crucial to carry out a task which won’t put one’s life at serious risk.

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