FNIRSI LCR-ST1 – Precision Mini Smart Tweezer LCR Meter & SMD ESR Tester for Surface-Mount Component Analysis

The FNIRSI LCR-ST1 is a compact, high-precision digital tweezer-style LCR meter and SMD ESR tester designed to revolutionize surface-mount component testing. With its lightweight pen-like form, intelligent auto-identification system, and crisp OLED display, this smart tool is an essential diagnostic companion for electronics engineers, repair technicians, and hobbyists working with compact or densely populated PCBs.

Engineered for SMD Precision

Built specifically for modern surface-mount devices (SMD), the LCR-ST1 combines the functionality of a traditional multimeter with the ease of precision tweezers. Simply grasp a component—no matter how small—and the device automatically detects and measures:

• Inductance (L)

• Capacitance (C)

• Resistance (R)

• ESR (Equivalent Series Resistance)

• Diodes & Continuity

• Component type & polarity

Whether you’re testing loose components or in-circuit parts, the FNIRSI LCR-ST1 delivers quick and accurate results without the hassle of manual mode switching.

High-Contrast OLED Display with Real-Time Readout

Equipped with a sharp OLED screen, this mini LCR tester provides real-time measurement data with clear visibility—even in low-light conditions. Displayed values include component type, pin configuration, and measurement metrics like resistance (Ω), capacitance (nF/μF), inductance (μH), and ESR (Ω).

• Auto-display rotation for left- or right-hand usage

• Live updates with test frequency and measurement mode

• Color-coded test result indication

Rechargeable, Portable, & Built for Daily Use

Designed for mobility, the FNIRSI LCR-ST1 is USB Type-C rechargeable and includes a long-lasting lithium battery, capable of supporting extended work sessions. Its compact tweezer-style design allows you to carry it easily in your pocket or toolkit.

• Battery Type: Built-in 300mAh lithium battery

• Charging Interface: USB Type-C

• Operation Time: 8–10 hours

• Weight: Only ~100g

Ideal For:

• Surface-mount device (SMD) testing

• On-site PCB diagnostics & repairs

• Rapid LCR measurement in laboratories

• Quality assurance in production lines

• Educational demonstrations and training

• DIY electronics prototyping & troubleshooting

Key Features Overview:

• Auto component identification (L, C, R, ESR, Diode)

• Tweezers-style design for one-handed operation

• OLED screen with real-time data visualization

• USB-C rechargeable with long battery life

• Supports in-circuit and loose part testing

• Compact & ergonomic – perfect for portable use

• High measurement accuracy across multiple ranges

• Anti-slip grip and high-quality stainless probes