Description

The FNIRSI LCR-ST2 is a compact dual-mode LCR and ESR meter built into a handheld tweezer form factor, designed for fast and accurate passive component measurement in both bench and field environments. It measures resistance, capacitance, inductance, ESR, diode forward voltage, and DC voltage up to 30V, with five selectable test frequencies from 100Hz to 100kHz and four adjustable RMS excitation levels from 0.1V to 1.0V.

The device supports both series and parallel equivalent circuit modes simultaneously, displaying D, Q, Z, X, theta, and ESR parameters alongside primary R/L/C values on a 1.47-inch HD color display that auto-rotates based on hand orientation. A full-band sweep mode runs a multi-frequency scan from 100Hz to 100kHz in a single action, allowing rapid frequency response characterization without manual frequency stepping.

For SMD component testing, the straight and curved tweezer tips allow direct contact on board-mounted or loose surface-mount parts. The Plus variant adds a Kelvin clip accessory for four-wire measurement of larger or through-hole components. An intelligent sorting function evaluates components against a preset nominal value and tolerance to pass or flag parts during batch testing, making the LCR-ST2 practical for component screening and stock verification.

For electronics repair technicians, PCB designers, and hobbyists in Karachi sourcing passive components from local markets in Saddar or Bolton Market, the LCR-ST2 provides on-the-spot verification of unmarked or pulled components without requiring bench-mounted test equipment.

Why Choose the FNIRSI LCR-ST2?

Accurate passive component measurement has historically required either a bench-top LCR bridge or a basic handheld meter with limited frequency range. The LCR-ST2 sits between those two categories — it covers 100Hz to 100kHz test frequencies, supports series and parallel equivalent modes, provides ESR measurement, and fits in a shirt pocket. For repair technicians dealing with unmarked SMD components, engineers verifying pulled stock, or hobbyists building filter circuits and needing accurate L and C values, the LCR-ST2 eliminates the need to work blind or rely on nominal markings alone. The addition of a Kelvin clip in the Plus variant extends the same precision to through-hole and larger components without a separate instrument.

FEATURES

Measures resistance from 10 mohm to 10 Mohm, capacitance from 1 pF to 22 mF, inductance from 1 uH to 10 H, diode forward voltage up to 0.7V, and DC voltage up to 30V.

Provides D, Q, Z, X, theta, and ESR secondary parameter readings alongside primary R/L/C values for complete component characterization.

Five selectable test frequencies — 100Hz, 120Hz, 1kHz, 10kHz, and 100kHz — cover the range required for accurate measurement across different component types and values.

Four adjustable RMS excitation levels of 0.1V, 0.3V, 0.6V, and 1.0V allow optimized measurement stability depending on component type and sensitivity.

Simultaneous series and parallel equivalent circuit display minimizes parasitic interference and improves measurement accuracy for real-world component behavior.

Full-band sweep mode performs a multi-frequency scan from 100Hz to 100kHz in a single action for rapid frequency response characterization.

Intelligent sorting mode evaluates each component against a user-defined nominal value and tolerance, returning an OK or NG result for efficient batch testing and component screening.

Dual-form design combines straight and curved tweezer tips for SMD testing with an optional Kelvin clip accessory for four-wire measurement of larger or through-hole components (Plus variant).

Automatic R/L/C component recognition identifies component type on contact, with dual-parameter display, HOLD, Max, and Min functions available during measurement.

1.47-inch HD color display with auto-rotate orientation accommodates both left-handed and right-handed operation without manual adjustment.

Magnetic attachment on the body provides a convenient storage and handling option for quick access in field or workshop environments.

Powered by a 300mAh lithium battery with USB Type-C charging, delivering approximately 3 hours of continuous operation per charge.

Dimensions of 31 x 170.7 x 20.3mm and weight of approximately 60.8g make it compact enough to store in a tool bag or component drawer.

SPECIFICATIONS

Model: LCR-ST2
Resistance range: 10 mohm to 10 Mohm
Capacitance range: 1 pF to 22 mF
Inductance range: 1 uH to 10 H
Diode measurement: On-state voltage up to 0.7V
Voltage measurement: up to 30V DC
Test frequencies: 100Hz, 120Hz, 1kHz, 10kHz, 100kHz
RMS excitation levels: 0.1V, 0.3V, 0.6V, 1.0V
Secondary parameters: D, Q, Z, X, theta, ESR
Equivalent modes: Series and parallel, simultaneous display
Display: 1.47-inch HD color, auto-rotate
Battery: 300mAh lithium
Charging: USB Type-C
Battery life: Approximately 3 hours
Dimensions: 31 x 170.7 x 20.3mm
Weight: Approximately 60.8g
Operating temperature: 0°C to 50°C (humidity up to 75%)
Storage temperature: -20°C to 60°C (humidity up to 75%)
Warranty: 2 years (direct purchase via fnirsi.com); 30-day return and refund guarantee