FNIRSI LCR-ST1 Mini Smart Digital Tweezer (LCR/SMD/ESR Tester)

The FNIRSI LCR-ST1 Mini Smart Digital Tweezer is a bench essential for diagnosing densely packed drone electronics. When repairing flight controllers, ESCs, or video transmitters, identifying microscopic SMD components or finding shorted capacitors can be a frustrating process. This battery-powered tweezer meter integrates precision test probes with an LCR and ESR tester, allowing you to measure surface-mount components directly in-circuit with automatic component identification.

Key features

• Automatic measurement mode detects and measures inductance, capacitance, and resistance without manual range switching.
• Dedicated ESR testing capability for diagnosing degraded or blown filtering capacitors on ESCs.
• Gold-plated tweezer tips ensure low-resistance contact on tiny 0402 and 0603 surface-mount packages.
• Built-in 1.14-inch colour display directly on the handle for immediate reading of primary values and secondary parameters.
• Integrated 250mAh battery easily recharged via a standard USB-C port.
• Two replaceable tweezer heads (pointed and hook), plus test records that can be viewed and exported on a PC.

Specifications

• Display: 1.14-inch colour LCD
• Test Frequencies: 100Hz, 1kHz, 10kHz
• Test Levels: 0.3V / 0.6V RMS
• Resistance Range: 10mΩ - 10MΩ
• Capacitance Range: 1pF - 22mF
• Inductance Range: 1µH - 10H
• Other readings: ESR, D, Q, Z, X; diode and continuity
• Battery: 250mAh LiPo
• Dimensions: 150 x 28 x 19 mm
• Weight: 41g

This compact tool replaces bulky bench multimeters for intricate SMD work, making it significantly easier to troubleshoot 5V regulators, verify VTX antenna path inductors, or locate burnt resistors on micro AIO boards.