The Fluke 381 is a heavy-duty industrial 1000 A True-RMS clamp meter with detachable remote wireless display. The innovative separate readout unit lets technicians take high-voltage high-current readings from a safe distance, drastically mitigating arc flash and electric shock hazards. The 52 mm extra-wide jaw accommodates all types of large busbars and bundled heavy cables, enabling full-range 1000 A AC/DC measurement without cable disassembly. Built-in inrush current capture and low-pass filter deliver precise results for distorted waveforms from motors, welders and variable frequency drives. Integrated full multimeter functions complete all electrical tests of current, voltage, resistance and frequency in one tool, with top-tier CAT IV 600 V service entrance safety rating, ideal for preventive inspection and safety acceptance of high-power equipment in PV, metallurgy, marine and power distribution industries.