LCR Meters

LCR meters are precision test instruments designed to measure the three fundamental passive electrical properties: inductance (L), capacitance (C), and resistance (R). By applying an AC test signal at a defined frequency and analyzing the device response, these instruments determine impedance and derived parameters including ESR (equivalent series resistance), Q factor, D (dissipation factor), and phase angle. LCR meters are essential for characterizing passive components — resistors, capacitors, inductors, transformers, and ferrite cores — under realistic operating conditions.

Instruments range from portable handheld units for workshop use to high-precision benchtop models covering sub-hertz to several megahertz. Advanced models include built-in DC bias sources for testing components under rated conditions, fixture compensation to eliminate lead impedance errors, and binning outputs for automated sorting. Component test fixtures and SMD probing accessories extend their utility to automated production line testing.

Typical Applications

Incoming component inspection and goods-in verification in electronics manufacturing
SMD passive component characterization and binning on automated production lines
Transformer and inductor characterization in power electronics R&D
Filter design and resonant circuit verification in telecommunications engineering
Failure analysis and quality control of capacitors, ferrites, and magnetic cores
Evaluation of piezoelectric elements and MEMS devices for medical and automotive sectors

Popular Brands

Keysight Technologies offers a comprehensive portfolio from benchtop LCR meters to high-precision impedance analyzers, with a wide range of dedicated test fixtures for SMD and through-hole components. Hioki produces fast, accurate instruments widely used across Asian electronics manufacturing. Wayne Kerr specializes in high-frequency and high-voltage component characterization solutions.