The electric tester is a very popular electrical testing tool in households and in the electronics and refrigeration repair industry. Below, we will learn about the basic information and necessary notes when using an electric tester .

I. What is an electric tester? Structure of an electric tester
II. Operating principle and uses of electric tester
III. Classification of electric test pens
IV. Buy genuine electric test pens at good prices at Phu Thai Tech

I. What is an electric tester? Structure of an electric tester

An electric tester is a tool to quickly check electrical equipment and electrical outlets before and after repairs, to determine whether there is electricity in the equipment or not. This is helpful in repairing equipment or electrical systems, or detecting electrical leaks to stay away from and ensure safety.

GARANT 2.5 mm flat tip electric tester

The basic structure of most electric test pens is quite simple, including an outer shell made of plastic to help insulate, and a metal tip used to contact the location to be tested. Inside the pen shell there are resistors, springs and neon bulbs. The pen tip is attached to a metal piece that is the place to contact the user's finger.

The structure of the electric tester is quite simple and compact, so it is very convenient, easy to hold in hand or put in pocket during repair.

II. Operating principle and uses of electric tester

The working principle of the electric test pen is based on the body's capacitance mechanism. When using it, you just need to place the metal tip of the electric test pen in the position to be tested, and touch the metal part on top of the pen tip with one finger. The electric current goes from the metal tip through the resistor to the neon bulb and through the human body's capacitance, forming a closed circuit that makes the bulb light up.
This current is usually very small so it does not cause shock to the user, very safe to use.

When you put the metal tip on the hot wire (phase wire), the light will turn on, but if you put it on the cold wire (neutral wire without electricity), the light will not turn on. If the light is on when placed on both wires, it means there is a problem at that position, you should check the power source again.

Distinguishing between direct current and alternating current: For direct current, the pole connected to the negative pole of the power source will light up. For alternating current, both poles of the neon bulb will alternately act as the negative and positive poles, so both poles will light up.

III. Classification of electric test pens

Electrical testers can be classified into two main types, contact electrical testers and non-contact electrical testers, based on the way they come into contact with materials to test their current and conductivity.

Contact Test Pen: This is the most common and widely used type of test pen. The contact test pen has a sharp metal tip, which is inserted to directly contact the wire connection points, connections or other electrical components to test the current .

247 flat tip 3mm electric tester

Non-contact testers : These are a newer type of tester that uses a different operating principle than contact testers. Instead of inserting a metal tip into direct contact with a wire junction, connection, or other electrical component, a non-contact tester uses an electric field to determine the conductivity of a material. Non-contact testers are often used to test conductive materials such as pipes or other electrical components without having to come into direct contact with them.

HOLEX NON-CONTACT ELECTRICAL TESTER

However, the price of non-contact electric tester is much higher than that of contact electric tester. Depending on the needs of use, we can choose a suitable type.

IV. Buy genuine electric test pens at good prices at Phu Thai Tech

PHU THAI TECH is proud to be the leading distributor of genuine high-end hand tools in Vietnam with more than 500 world famous brands.

PHU THAI TECH has a full range of electrical test pens from the world's leading hand tool brands.

If you want to find electric test pens in particular, and hand tools in general with genuine quality and the best prices in Vietnam, PHU THAI TECH will be your destination. Not only that, PHU THAI TECH also has a convenient Eshop system and showroom system across all 3 regions with attractive promotional programs that take place regularly. Whether you want to shop online or offline, PHU THAI TECH can provide shopping opportunities that are hard to refuse.

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