FNIRSI LCR-ST2 Plus LCR Tester – 2.8 inch TFT, 100Hz-100kHz, L/C/R/ESR/D/Q, Rechargeable

On a crowded workbench, measuring inductors, capacitors, and resistors quickly becomes a challenge—especially when you need reliable readings for repair or matching components. The FNIRSI LCR-ST2 Plus is a pocket-sized multipurpose impedance tester that gives you confidence whether you're repairing a switching power supply, matching components for an audio crossover, or inspecting incoming parts for your repair shop. With five test frequencies from 100Hz to 100kHz and a true four-wire Kelvin test clip setup, it handles everything from large electrolytics to tiny SMD components.

Key specifications

• Measures L, C, R, ESR, D, Q and θ
• Test frequencies: 100Hz, 120Hz, 1kHz, 10kHz, 100kHz
• Inductance: 0.000μH to 2000H
• Capacitance: 0.000pF to 20mF
• Resistance: 0.00Ω to 20MΩ
• ESR: 0.00Ω to 2000Ω
• Basic accuracy: ±0.5% for R, C, L
• Display: 2.8-inch 320x240 TFT colour LCD
• Automatic/manual measurement modes
• Open and short circuit calibration
• Built-in 3.7V 1500mAh lithium battery with USB-C charging
• Auto power off

Why choose it

The LCR-ST2 Plus combines laboratory-style capabilities in a compact, battery-powered device. Its dual signal levels (0.2Vrms/0.5Vrms) let you choose the right voltage for the component under test, while the backlit display makes readings clear even in dim lighting. Fast and accurate, it's the tool you'll reach for again and again.

Ideal use cases

• Electronics repair and troubleshooting
• Component sorting and quality control
• Educational labs and prototyping
• Hobbyist projects and audio electronics

Good to know

The 4-wire Kelvin test clips eliminate lead resistance for low-value measurements, ensuring accuracy even with small resistances. The device supports data hold and operates within 0°C to 40°C, making it suitable for various environments.