Prófunarpenni, plasthandfang, ryðfríu stálklemma

The principle of the electroprobe is that an electric current flowing through the rare gas in the electroprobe will give out a colored light. When you measure electricity, you touch the tail of the pen, because that's how you create a circuit, and the current flows in from one end of the pen, through the rare gas, to the tail, and then the current flows through the body into the ground. If you don't, the current can't flow from the pen directly down. Of course, this current is too small to cause harm, and noble gas resistance is very high. The test pen is a common tool used to check and measure whether the low-voltage conductor and the shell of electrical equipment are charged

Test pen is often made of pen type structure or small screwdriver structure. It has a metal probe at the front, neon bubbles, safety resistors and springs in the plastic shell at the back, and a metal end cap or pen-type metal nose at the end as the metal part that must be touched by the hand when using. A common test pen can measure the voltage between 60 and 500 VOLTS. The neon bubble of the test pen may not emit light when the voltage is above 60 volts. Do not use a common test pen when the voltage is above 500 volts, otherwise it may cause electric shock

When the tip of the test pen touches the charged body, the voltage on the charged body passes through the tip of the test pen, neon bubble, safety resistance, spring and the metal body at the end of the pen, and then connects to the earth to form a loop. If the voltage between the charged body and the earth exceeds 60 volts, the neon bubbles in the test pen will glow, indicating that the charged body is electrically charged