The electric test pen is one of the necessary tools for electricians. It is used to test whether the conductor is live. It is mainly used to check whether the electrical circuit and electrical equipment are live. The structure of the electric test pen is introduced here.
The structure of the test pen is generally composed of contact electrodes, resistors, neon bulbs, springs and metal end caps (hand contact electrodes). For digital, it is also composed of display screen, indicator light, electric test time key and power-off test key.
There are many appearances of the electric test pen, such as the shape of a screwdriver, but it cannot be used as a screwdriver, and it cannot be used to fasten screws or remove screws. There are also some new types of test pens, such as digital ones, which can not only observe whether there is electricity in the wire, but also measure the value of the voltage. In addition, some electrician friends use the electric test pen which is inductive, which is very convenient to use. There are many types of test pens, which increase the choice of electricians.
