Electrical testers and current probes are essential tools for measuring voltage, current, continuity, and other electrical parameters in circuits and systems. Electrical testers provide quick diagnostics for wiring, components, and power sources, while current probes accurately measure AC/DC current without interrupting the circuit. Commonly used in design validation, troubleshooting, and field service, these tools support safe, non-invasive testing in electronics, industrial equipment, and power systems.