Multimeters are versatile electronic measuring instruments widely used in industrial applications for testing and diagnosing electrical systems. They combine multiple functions, including voltage, current, and resistance measurement, often with additional features like continuity testing, capacitance, and frequency measurement. Available in digital and analog variants, multimeters are essential tools for electricians, engineers, and technicians in maintenance, troubleshooting, and quality control. Industrial-grade models offer rugged designs, high accuracy, and safety certifications (e.g., CAT III/IV) for harsh environments. Common applications include power distribution, automation, HVAC, and machinery repair.