Voltage & Current Data Loggers

Voltage and current data loggers are instruments designed to record electrical parameters — including AC/DC voltage, current, power, and power quality indices — over time for analysis and compliance purposes. They bridge the gap between handheld multimeters and permanent power monitoring systems, offering portable, unattended measurement over hours, days, or weeks. Electrical engineers and facility managers deploy these loggers to characterize power distribution networks, document energy consumption, and capture intermittent faults that would be invisible during a spot measurement.

Instruments in this category span from compact single-channel voltage recorders to three-phase power quality analyzers capable of capturing harmonic distortion, voltage sags, swells, and transients. Many comply with IEC 61000-4-30 Class A or Class S standards for power quality measurement, making their data suitable for regulatory reporting and troubleshooting grid disturbances.

Typical Applications

Power quality analysis and compliance testing in industrial facilities and data centers
Energy auditing and load profiling for efficiency improvement programs
Electrical fault investigation — detecting voltage sags, transients, and harmonic distortion
Generator and UPS commissioning and acceptance testing
Renewable energy system performance monitoring in solar and wind installations
Motor drive and variable-frequency drive diagnostics in manufacturing

Popular Brands

Fluke is the dominant brand in portable power quality recording, with its 1760 series widely used by facility engineers and utilities. Keysight offers modular switching and matrix instruments for high-channel-count voltage logging in automated test systems. Yokogawa and Hioki provide high-accuracy power analyzers used in R&D and precision energy measurement. AEMC Instruments and Dranetz also serve the power quality and energy auditing markets.