The FNIRSI LC1020E is a high-precision handheld LCR meter and digital bridge designed for fast, accurate measurement of inductance (L), capacitance (C), resistance (R), impedance (Z), and ESR. With a 2.8" TFT color display, up to 100 kHz test frequency, and 4.5-digit resolution, it’s built for professional labs, production lines, and serious hobbyists who need benchtop-grade performance in a portable unit.

Features :

• High precision, 4.5-digit resolution
  • Basic accuracy up to ±0.05% (often marketed as 0.05–0.3?pending on source)
  • 4.5-digit display gives fine resolution for component characterization 
• Wide parameter support
  • Measures: L, C, R, Z
  • Displays secondary parameters: X, D, Q, θ (phase angle), ESR
  • Supports measurement combinations: L/Q, C/D, R/D with series / parallel equivalent circuit models
• Five test frequencies up to 100 kHz
  • Selectable: 100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz
  • Covers low-frequency power components up to higher-frequency small signal parts 
• Selectable test voltage levels
  • 0.1 V, 0.3 V, 0.6 V (RMS)
  • Lets you match test conditions to sensitive components or standard production requirements
• Smart auto component identification
  • Automatically recognizes R, L, C components and switches to the appropriate measurement mode
  • Greatly speeds up sorting, QC, and repair work
• Sorting and comparison mode
  • Set nominal value + tolerance (0.1%–99.9%)
  • Instrument gives pass/fail audio-visual prompts for fast batch testing and quality control 
• Internal bias voltage
  • Built-in bias improves stability and accuracy for certain components in detailed analysis 
• Dual test ports with Kelvin support
  • 3-terminal and 5-terminal input options
  • 4-wire Kelvin configuration minimizes lead resistance for more accurate low-resistance and low-impedance measurements 
• 2.8" TFT color display
  • 2.8-inch HD TFT LCD shows both primary and secondary parameters simultaneously
  • Clear layout for L/C/R/Z plus X/D/Q/θ/ESR in real time 
• Data hold and logging
  • Short press: freeze the current reading (data hold)
  • Long press / special mode: enter logging/statistics mode with pass/fail counting and grouped statistics for production runs 
• Calibration functions
  • Open-circuit and short-circuit calibration to remove fixture and lead errors
  • Essential when changing test adapters or measuring very small values 
• Large rechargeable battery
  • Built-in 3.7 V, 3000 mAh lithium battery
  • USB Type-C charging; supports use while charging
  • Designed for long sessions in the lab or field

Specifications :

• Model / Brand
  • Brand: FNIRSI
  • Model: LC1020E 
• Measurement Functions
  • Primary: L, C, R, Z
  • Secondary: X, D, Q, θ, ESR
• Frequency & Test Level
  • Test frequencies: 100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz
  • Test levels (RMS): 0.1 V, 0.3 V, 0.6 V
  • Output impedance: ≈100 Ω 
• Display & Interface
  • 2.8" TFT color LCD
  • Dual-parameter display (main + secondary)
  • On-screen sorting result and pass/fail indication 
• Accuracy & Resolution
  • Resolution: 4.5 digits
  • Basic accuracy: up to ±0.05% (often listed as 0.05–0.3?pending on conditions)
• Power
  • Battery: 3.7 V 3000 mAh Li-ion
  • Charging: USB Type-C, supports external 5 V supply
• Mechanical / Form Factor
  • Type: handheld digital bridge / LCR meter
  • Form: rectangular handheld unit with front test jacks; works with clip leads, Kelvin fixtures, or optional tweezers 

Applications :

• Component testing & selection
  • Characterizing inductors, capacitors, resistors, and networks in design or repair
  • Evaluating ESR and Q of capacitors for power electronics
• Production line & QC
  • Use sorting mode with audio-visual pass/fail for mass component screening
  • Statistical logging to monitor batch quality in real time
• R&D and lab use
  • Studying frequency response of components up to 100 kHz
  • Comparing series/parallel models and analyzing phase angle and loss factors
• Field service and troubleshooting
  • Portable, battery-powered instrument for checking components on site
  • Handy for power supplies, RF sections (low-to-mid freq), and general electronics maintenance