Updated on 19 October, 2021
How do Non Contact Voltage Meters Work? Non contact voltage meters work by detecting a very tiny amount of capacitively connected capacitance from the live wire to the meter and then back to the ground. There are generally three types of non contact voltage meters available: mechanical, electronic and contact. Mechanical non contact (NVD) meter works by detecting signals with a non metallic reference source such as a stylus, pen, fingernail, or an exposed screw. Electronic non contact (ECN) meter uses transistors, diodes and contacts to detect the signals.
With a Live Wire Tester you can easily check the output power and voltage level of any circuits that are to be tested. Using a Live Wire Tester, a meter reader is connected to the input terminals of the circuit to be tested and a series of currents are applied to it via the tester. As the current passes through the various conducting components, the resistance develops across the terminals and the reading on the meter shows the voltage drop. The sensitivity of the meter's measurement of the current variation results in a measurement of the resistance across the terminals. An ECN tester uses a diode to reduce or increase the resistance across the terminals. To test circuits that include conductors that are coated, a coating sleeve is used.
Some advantages of using a Live Wire Tester are: There is no need for manual setting of resistivity and cap compliance levels. When you are using a NVD type of voltage tester pen, it is easy to determine the polarity of a short circuit as they always tend to have a positive and a negative charge on the terminals. Also, you will find that the battery powered varieties are quite simple to operate as there is no need for setting up a power source. Finally, these devices are very compact and light in weight making them easy to carry around the lab.
When using a Live Wire Tester you will notice the use of both conductors and a small amount of a gel that will adhere to both sides of the terminal. This gel is what provides the electronic feedback as the current passes through the device. Another benefit that you will find with a non-contact variety is that you do not need to worry about surface contamination which can present a problem when using conductors. If the wire gets wet, it can usually be wiped clean without the use of water.
There are a few disadvantages of using non-contact voltage tester pens. For one thing, you should consider the length of time that you intend to use the device. Although this type of device typically lasts longer than other varieties, if you intend to utilize it for a longer period of time, you may want to consider another option. While you can easily extend the life span of these types of devices, you also have to consider the possibility of overloading. Some of these testers can overload if you leave it on continuously.
So, if you are interested in finding a non-contact voltage detector that can provide you with the feedback that you need in your experiments, you might want to consider the Lindberg Live Wire Tester. This brand has long been a trusted name for many laboratories and other research facilities. The Live Wire Tester is a very simple device to operate and you do not have to worry about contaminating anything while testing. It is designed in a way that allows it to detect low levels of voltage across the conductors. This makes it perfect for experiments that require conducting multiple experiments at once. These devices do not waste any power and are quite energy efficient.
If you are looking for an affordable option, there are many other types of non-contact voltage detectors available on the market. You can also find various accessories with these devices such as testing meters and probes. You can always mix and match the products that you purchase depending on what your needs are. For instance, some voltage testers come with a probe that can be used to determine the resistance level of a wire. You can also purchase a meter with many different input parameters so that you can test different wires simultaneously.
These are just some of the things that you can learn from a Live Wire Tester. Before purchasing one, you should make sure that you know which type you will need for the testing that you plan to do. There are many different models to choose from and this could leave you unsure as to which one is the best choice. Once you know your needs, you will be able to easily find a reliable Live Wire Tester that can help you determine the integrity of a wire and other materials.