This item is a Smart Sensor ST4100 Earth Clamp Meter, a device used for measuring ground resistance without disconnecting the ground wire.
Resistance Measurement Range: 0.010Ω to 500Ω.
Data Storage: Capable of storing up to 500 groups of data.
Applications: Suitable for electric power, telecommunications, meteorology, and factory grounding networks.
Features: Includes an LCD display, alarm function, and automatic identification of interference signa