Magnetic Pole Pen 862M±5mT (50Gs) High Sensitivity Magnet Polarity Tester North South Poles Tester Pen

Sensitive probe with high accuracy and high-quality chip make the measurement more sensitive and accurate. It is easy to see, LED light-emitting diodes will show their polarity in different colors, red is the N pole, green is the S pole. Magnetic pole identification pen is a fast, easy and safe tool. It is an instrument used to identify the polarity of a magnetic field. It has a portable pen holder design, which is and lightweight, easy to carry and can be measured anytime and anywhere without t