Hall-effect AC/DC current probes are an important tool in modern electrical measurement, which can safely measure AC and DC currents without disconnecting the circuit. Its core principle is the Hall effect-the magnetic field signal is converted into a voltage signal, and then the current value is calculated.

This effect was discovered by physicist Edwin Hall in 1879: when a current flows in a semiconductor perpendicular to an external magnetic field, a Hall voltage proportional to the magnetic induction is generated on both sides of the element. This 1 of the magnetic field in the probe is coming from the current in the wire being measured.

The probe structure cleverly uses this principle. The jaw is embedded with a high sensitivity Hall element and is precisely installed in the air gap of the magnetic core. The magnetic core collects the magnetic field generated by the wire current and makes it pass vertically through the Hall element, which greatly improves the detection sensitivity.

Its working process is efficient and simple: the wire current generates a magnetic field, which is concentrated by the magnetic core and then acts on the Hall element. The element outputs a small voltage, which is then amplified, zeroed and compensated by the internal circuit, and finally outputs a standard electrical signal.

Due to the direct induction of magnetic field strength rather than the rate of change, this type of probe naturally has the ability to measure AC and DC, and the scope of application is much wider than the transformer clamp meter that can only measure AC.