How much voltage can the pen measure

The power tester is divided into three categories according to the different voltages measured:

1, high-voltage tester can be used to detect the voltage in the project above 10kV;

2, low-voltage tester is suitable for the voltage range of 500V below the detection of energized facilities;

3, when the test voltage ranges from 6 ~ 24V, people often use weak power The power checking pen.

The front end of the tester is a metal probe, which is used to make contact with the equipment being tested. The back end is also metal, may be a metal hook, may be a metal plate, used to contact with the human body. Inside the insulated tube in the center is a neon light that glows, a resistor, and a pressure spring. Regardless of the type and construction of the tester, they work on the same principle.

Expanded Information

Precautions for use:

(1) Before using the test pen, first check the test pen with or without a safety resistor, and then visually check the test pen for damage, dampness or water, check the qualified before use.

(2) When using the test pen, can not touch the metal probe at the front end of the test pen, this will cause personal electric shock accident.

(3)When using the test pen, you must touch the metal part of the end of the test pen with your hand, otherwise, because the charged body, the test pen, the human body and the earth do not form a circuit, the neon bubble in the test pen will not glow, resulting in a misjudgment that the charged body is not electrified, which will lead to a dangerous occurrence.

Baidu Encyclopedia - Electricity Detection Pen