That is, the working principle of the electric pen The low-voltage electric test pen is an electrician's eye, a tool used to detect whether wires, electrical appliances and electrical equipment are charged. It is mainly composed of pen tips, neon bulbs, step-down resistors, springs, etc. The principle is that the potential difference between the charged body and the earth exceeds a certain value, and the neon bulb will emit light, and if it is lower than a certain value, it will not emit light, so as to determine whether the low-voltage electrical equipment is charged. The voltage measurement range of ordinary low-voltage electroscopes is 60 to 500v. Neon bulbs may not emit light below 60v. Voltages higher than 500v must be measured with an electroscope of the corresponding voltage level to avoid electric shock accidents. In addition to measuring whether the equipment is charged, the test pen for testing AC, DC and DC positive and negative electrodes can also test AC, DC, and the positive and negative electrodes of DC. The neon bulb of the direct current test pen has only one head glowing. When testing alternating current, the middle of the neon bulb will glow.
AC Voltage Tester Pen GD116C :
Pls Clink Below Photo and Read more details about this עט בודק מתח AC GD116C :
