Clamp meters are essential electrical testing tools designed for measuring current without direct contact with conductors. Key features include non-invasive current measurement (AC/DC), compact design for portability, and additional functionalities like voltage/resistance testing. Widely used in industrial maintenance, HVAC systems, and electrical troubleshooting, they prioritize safety by eliminating the need to break circuits during live measurements. Common variants include basic models for general use and advanced versions with data logging or wireless capabilities for complex diagnostics.