FNIRSI LCR-ST2 100K LCR ESR Meter is a professional handheld component tester designed for accurate measurement of resistance, capacitance, inductance, ESR, diode, and voltage. Supplied by BDTronics, it Featuring a dual-mode design with precision tweezers and Kelvin clip support, this advanced digital LCR meter delivers reliable testing for SMD components, through-hole components, PCB repair, electronics troubleshooting, laboratory testing, production quality control, and component sorting.

The FNIRSI LCR-ST2 combines high-precision measurement, intelligent component recognition, multi-frequency testing, and full-band sweep analysis in a compact portable design. Ideal for electronics engineers, technicians, students, hobbyists, repair professionals, and manufacturing environments. Available from BDTronics for professional electronic measurement applications.

Specifications:

• Brand: FNIRSI

• Model: LCR-ST2

• Product Type: Digital LCR ESR Meter

• Display: 1.47-inch HD Color Display

• Testing Method: Tweezer Probe + Kelvin Clip Support

• Interface: Type-C

• Battery Capacity: 300mAh Lithium Battery

• Operating Time: Approximately 3 Hours

• Dimensions: 31 × 170.7 × 20.3mm

• Weight: Approximately 60.8g

• Operating Temperature: 0°C to 50°C

• Operating Humidity: ≤75%

• Storage Temperature: -20°C to 60°C

• Storage Humidity: ≤75%

Resistance Measurement

• Measurement Range: 10mΩ to 10MΩ

10mΩ – 1Ω

• 100Hz/120Hz: ±2% + 3 digits

• 1kHz: ±2% + 3 digits

• 10kHz: ±2% + 3 digits

• 100kHz: ±5% + 3 digits

1Ω – 1kΩ

• 100Hz/120Hz: ±1% + 3 digits

• 1kHz: ±0.5% + 3 digits

• 10kHz: ±1% + 3 digits

• 100kHz: ±5% + 3 digits

1kΩ – 1MΩ

• 100Hz/120Hz: ±1% + 3 digits

• 1kHz: ±0.5% + 3 digits

• 10kHz: ±1% + 3 digits

1MΩ – 10MΩ

• 100Hz/120Hz: ±5% + 3 digits

• 1kHz: ±5% + 3 digits

Capacitance Measurement

• Measurement Range: 1pF to 22mF

1pF – 1nF

• 1kHz: ±2% + 3 digits

• 10kHz: ±2% + 3 digits

• 100kHz: ±5% + 3 digits

1nF – 1µF

• 100Hz/120Hz: ±2% + 3 digits

• 1kHz: ±0.5% + 3 digits

• 10kHz: ±0.5% + 3 digits

• 100kHz: ±5% + 3 digits

1µF – 1mF

• 100Hz/120Hz: ±2% + 3 digits

• 1kHz: ±2% + 3 digits

• 10kHz: ±2% + 3 digits

• 100kHz: ±5% + 3 digits

1mF – 22mF

• 100Hz/120Hz: ±5% + 3 digits

• 1kHz: ±5% + 3 digits

Inductance Measurement

• Measurement Range: 1µH to 10H

1µH – 10µH

• 1kHz: ±2% + 3 digits

• 10kHz: ±2% + 3 digits

• 100kHz: ±5% + 3 digits

10µH – 1mH

• 100Hz/120Hz: ±2% + 3 digits

• 1kHz: ±0.5% + 3 digits

• 10kHz: ±0.5% + 3 digits

• 100kHz: ±5% + 3 digits

1mH – 1H

• 100Hz/120Hz: ±2% + 3 digits

• 1kHz: ±2% + 3 digits

1H – 10H

• 100Hz/120Hz: ±5% + 3 digits

• 1kHz: ±5% + 3 digits

Diode Measurement

• On-State Voltage: ≤0.7V

Voltage Measurement

• Measurement Range: ±30V

Test Frequencies

• 100Hz

• 120Hz

• 1kHz

• 10kHz

• 100kHz

RMS Test Levels

• 0.1V

• 0.3V

• 0.6V

• 1.0V

Measured Parameters

• Resistance (R)

• Capacitance (C)

• Inductance (L)

• ESR

• Dissipation Factor (D)

• Quality Factor (Q)

• Impedance (Z)

• Reactance (X)

• Phase Angle (θ)

• Voltage

• Diode Forward Voltage

Features:

• Measures Resistance, Capacitance, Inductance, ESR, Diode, and Voltage

• Supports dual testing modes with Tweezer Tips and Kelvin Test Clip

• Automatic identification of resistor, capacitor, and inductor components

• Full-band frequency sweep from 100Hz to 100kHz

• Five selectable test frequencies:

  • 100Hz

  • 120Hz

  • 1kHz

  • 10kHz

  • 100kHz

• Four adjustable RMS test levels:

  • 0.1V

  • 0.3V

  • 0.6V

  • 1.0V

• Measures important electrical parameters:

  • ESR

  • D

  • Q

  • Z

  • X

  • θ

• Simultaneous Series and Parallel equivalent value comparison

• Intelligent component sorting and tolerance grading

• Fast OK/NG batch component testing

• High-precision ESR measurement for capacitor evaluation

• Supports diode forward voltage testing

• Built-in ±30V voltage measurement function

• Dual-parameter display for improved analysis

• HOLD, Maximum, and Minimum measurement functions

• Automatic screen rotation for left-handed and right-handed operation

• Magnetic attachment design for convenient storage

• 1.47-inch HD color display with clear measurement visibility

• Compact and lightweight portable design

• Rechargeable 300mAh lithium battery

• Type-C charging interface

• Up to approximately 3 hours operating time

• Suitable for electronics repair, PCB diagnostics, laboratory testing, educational use, and industrial maintenance

Applications:

• SMD component testing

• Capacitor ESR measurement

• Resistor testing

• Inductor testing

• Diode checking

• PCB troubleshooting

• Motherboard repair

• Mobile phone repair

• Laptop repair

• Power supply repair

• Electronics laboratory testing

• Production line inspection

• Component quality control

• Electronic component sorting

• Research and development projects

• Educational electronics training

How to Use:

• Power on the FNIRSI LCR-ST2 meter.

• Select desired test frequency and RMS level.

• Connect the component using tweezer tips or Kelvin clip.

• Allow automatic component recognition.

• View measured values on the HD display.

• Use sweep mode for frequency response analysis.

• Enable sorting mode for batch testing and tolerance classification.

• Use voltage mode for DC voltage measurement up to ±30V.

• Recharge the device using the Type-C charging port when battery level is low.

Package Contents (PLUS Version)

• FNIRSI LCR-ST2 Meter
• Storage Bag
• Curved Tweezer Tip
• Shorting Plate
• Kelvin Test Clip
• USB Type-C Cable

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