electroprobe

Test pencil is referred to as the "test pencil, pencil". Is a kind of electrical tools, used to test whether the line of electricity. The pen has a neon bulb, if the neon light bulb test, indicating wire electricity or pathway for fire. In a test pencil nib, a pen tail, is made of metal material, the pen is made of insulation material. Use the test pencil, must touch the metal part, the end of the test pencil, otherwise, because of the charged body shidianbi, the human body and the earth did not form a loop, a test pencil in the neon bulb does not light, resulting in a miscarriage of justice, that the charged body is not charged.