LCR-ST2 100kHz LCR ESR Meter Tweezer - SMD Tester for Hobbyists

In this review the FNIRSI LCR-ST2 proves to be a compact, focused tool for anyone working with surface-mount parts; it is aimed at technicians, hobbyists, and small labs who need quick, reliable component verification. The single biggest reason to buy is its all-in-one capability: the tweezer meter measures resistors, capacitors, inductors, diodes, continuity and voltage while offering a full-range frequency scan up to 100 kHz, which makes it useful from RF components to large electrolytics.

Key Features

• All-in-one measurement: The unit tests R, C, L, diodes, continuity and voltage so users can verify most passive and diode components without swapping instruments.
• Full-range frequency scan: The selectable 100 Hz/120 Hz/1 kHz/10 kHz/100 kHz test frequencies let you examine components from low-frequency electrolytics to RF parts.
• Adjustable RMS levels and modes: Four RMS test voltages and a series/parallel mode reduce parasitic effects and improve accuracy for different component types.
• Primary and secondary readouts: Auto measurement displays primary parameters (R/C/L/Z) and secondary details (X/D/Q/) for more complete analysis of component behavior.
• Portable kit and tips: Gold-plated straight and angled tweezer tips, a storage pouch, Type-C charging and a rear magnet make the meter convenient for bench and field use.

Who It's For

The LCR-ST2 is ideal for electronics technicians, PCB repairers, and serious hobbyists who need a fast way to identify and verify SMD parts on boards or in reels without desoldering. Its full-frequency scan and series/parallel modes are useful for those testing both RF components and larger capacitors.

Less suitable for those who require Kelvin measurements for extremely low-resistance testing or instruments certified for lab-grade calibration; the kit also excludes Kelvin clips, so engineers needing 4-wire precision probes should look at dedicated lab LCR meters instead.

Pros & Cons

Pros

• Compact tweezer form factor with gold-plated tips speeds up SMD testing on the bench.
• Wide test frequency range and four RMS voltages provide flexibility for many component types.
• Primary and secondary parameter display gives detailed information for more confident diagnostics.
• Built-in rechargeable battery and Type-C charging make it convenient for portable use.

Cons

• No Kelvin clips included, limiting four-wire low-resistance measurements for specialist tasks.
• The screen is small, so very detailed numeric readouts can require close viewing.

Specifications

Product type	LCR ESR tweezer meter
Test frequencies	100 Hz, 120 Hz, 1 kHz, 10 kHz, 100 kHz
Measurement ranges	Capacitors 1 pF to 22 mF; Resistors 10 m to 10 M; Inductors 1 mH to 10 H
Test voltages	Four RMS levels: 0.1 / 0.3 / 0.6 / 1.0 V
Voltage/continuity	Voltage up to 30 V and continuity/diode check included
Power	Built-in 300 mAh rechargeable battery, Type-C charging
Accessories	Gold-plated straight and angled tweezer tips, storage pouch

Our Verdict

The LCR-ST2 is a practical, value-focused LCR tweezer that covers most needs for SMD verification and diagnostics; its full-range frequency options and series/parallel modes make it versatile from RF to electrolytic capacitors. For bench technicians and advanced hobbyists who want a compact tester with detailed readouts and portable power, it represents a sensible purchase, though users requiring four-wire Kelvin testing will need additional accessories or a lab meter.

Frequently Asked Questions

Can the meter test diodes and continuity?
Yes, it includes a diode check and continuity test in addition to R, C, L and voltage measurements.

Does it include different tweezer tips?
Yes, the kit ships with gold-plated straight and angled tweezer tips for different SMD form factors.

Is a separate charger required?
No, it uses a built-in 300 mAh battery and charges via a Type-C cable, which is convenient for bench and field use.