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High Speed, High Precision LCR Meter in Tweezers

Wide measurement range starting from 0.5pF, 0.5μH and 50mΩ

Capacitor ESR Value Display

Integrated Li-Ion Battery and Micro USB Charger 


● Espańol 

Datasheet ● Specifications STAD-3: ● Detailed Review ● Video Review

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LCR Meter - Smart Tweezers, RCL Meter, Multimeter, SMD Component Identifier

  • Built-in high-precision LCR probe
  • Convenient one-hand operation
  • Ideal for Surface Mount Devices
  • Automated component identification
  • Automated test range selection
  • Manual C, R, L, Z and ESR modes
  • Test signal levels 0.25-1.0 Vrms
  • Precise tips for small-size devices
  • Diode Polarity/Short Testing
  • Secondary D, Q, ESR parameters
  • Portable and ergonomic design
  • Built-in Li-Ion battery
  • Universal Micro USB charger

Smart Tweezers™ is a handheld electronic tool of a new concept.

Its unique design combines a pair of gold-plated SMD tweezers with ergonomic shielded handles and a precise full featured LCR impedance meter in a compact, lightweight instrument.

Smart Tweezers™ measures electronic component's capacitance, resistance and inductance with high speed and precision by evaluating circuit impedance. Additionally it tests diodes, measures ESR and impedance Z

Smart Tweezers™ provides a perfect solution for testing and identification of Surface Mount Devices (SMD) as well as for troubleshooting of complex electronic systems.

Handy Tool for Tiny SMD Components

Surface mount devices are usually tiny and without wire leads, making it more difficult to test and identify SMD than conventional components.

Smart Tweezers™ gives users an easy way to sort and evaluate loose components and to perform on-board measurements and debugging.

Precise gold-plated tips made of non-magnetic steel are able to pick and reliably contact even smallest SMD components (as small as 0201 format) or take measurements from the devices already mounted on a board. The probe can also be used to test conventional components with wire leads too short to insert into the test terminals.

Using LCR Meter Smart Tweezers

Smart Tweezers™  greatly simplifies
testing and troubleshooting process

Smart Tweezers™ ST5 - What is New?
  • Up to 6 times improved measurement precision:
    0.2% for C, 0.2% for R, 0.5% for L
  • Test signal can be varied from 0.25 to 1.0 Vrms.
    1.0Vrms allows higher precision measurements
    including X5R and similar ceramic capacitors.
    Low signal levels help in-board testings.
  • Test range can be adjusted
  • Dedicated ESR and Z modes
  • Math null function stores measurement offset
  • Tolerance function with audible indicator
    for component sorting
  • Multi-parameter dashboard display
  • Voltage/Trace Modes have been removed
  • 4-direction navigation control
    with quick mode selector
  • Built-in Rechargeable Li-Ion battery
  • Universal USB/Wall charger is included

Perfect for Conventional Components

Smart Tweezers™ works fine with conventional though-hole electronic components. The unit helps to verify values with high speed and precision.

Built-in Li-Ion Polymer Rechargeable battery  

Smart Tweezers™ comes equipped with a built-in high-capacity Li-Ion rechargeable battery. Battery replacements are not required.

Universal 110-220V power supply and Micro USB charging cord are included.

Automatic Component Recognition

Smart Tweezers™ automatically determines type of the component (resistance, capacitance or inductance), selects proper range and signal frequency for highest accuracy measurements. Manual  overrides are available as well.

Unit’s display clearly indicates the type of the component, measurement result and test conditions. The primary display shows the present reading. The secondary display (on top) shows the present reading of additional parameters or measurement conditions when the primary display shows some other feature (L, C). 

Resistance, capacitance and inductance can be measured with automatic selection of the test parameters and test range.

Ergonomic Design and Convenient Controls 

Default settings can be modified by navigating a set of menus with the Navigation Control. 

Meter's display can be easily flipped from the menu for left-handed use.

 LCR Meter - Smart Tweezers, Controls and Display

Continuity/Open Test, Diode Polarity Testing, Additional Parameters and Modes

Smart Tweezers™ LCR meter allows to test various component types, including secondary components of Dissipation Factor (D), Quality Factor (Q).

The built-in Equivalent Series Resistance (ESR) mode helps you better understand the inherent resistance - behavior typically found in capacitors across selected frequencies.

In its DIODE mode Smart Tweezers™ tests diode polarity and indicates if it is short.
Smart Tweezers™ has a continuity detector. Variable beeper sounds for resistance reading below set thresholds. Additionally, this function helps to locate shorted conductors (e.g. on a PCB).

In manual modes Smart Tweezers™ measures a specific circuit parameter — L, C, R, Z or ESR. Manual modes also improves component type identification for in-circuit tests.

Variable test signal output from 0.25 to 1.0Vrms allows to improve test precision in different situation e.g. for in-circuit measurement and loose leaded ceramic capacitors.

Visible and audible tolerance mode allows to perform component sorting.

Math null function allows to store a pre-measured offset and improve measurement precision.


Physical Specifications


Operating Temperature:

0 °C to +55 °C

Battery Type:

3.7V LiPO rechargeable 150mAH

Battery Life (continuous ):

80 Hours typical, 2 hours charging cycle

Electromagnetic Compatibility (EMC):

FCC 15 part B, SE


14.0 x 2.5 x 3.0 cm (3.94 x 0.9 x 1.5 in)


53 grams (0.11lb)


1 year

Technical Specifications


AC test mode Test frequency:

1 kHz, 10 kHz, 120Hz,100 Hz

Test frequency accuracy:

50 PPM (0.005%)

Test signal level:

0.25/0.5/1.0 +/- 5% Vrms Sine wave

Source impedance:

62.5Ω/1kΩ/16kΩ +/- 1%

Measurement Ranges and Precision







0.05 Ω to 9.9 MΩ


up to 0.2% (see datasheet for deatils)





0.5 pF to 4999 μF


up to 0.2% (see datasheet for deatils)





0.5 μH to 999 mH


up to 0.5% (see datasheet for deatils)


Quality factor Q:



0.001 to 1000*



Dissipation factor D:



0.001 to 1000*

* indication of the parameter not implemented in some versions


1 year from the purchase date. Advance replacement option is available.

Satisfaction Guarantee

If you are not satisfied with your purchase you may return the device for refund within 30 days from the purchase date.  The item must be in its original shape in the original box with manuals. Shipment charges are not refundable.

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