Smart Tweezers, LCR-Reader, LCR- and ESR-meters and accessories
LCR-Reader-MPA Product of the Year prize winner from Plant Engineering

LCR-Reader-MPA is the Bronze prize winner for Product of the Year 2020
according to the Plant Engineering Magazine
Click here to read more.

LCR-Reader-MPA Plant Engineering Product of the Year Winner

LCR-Reader-MPA: All-in-One Digital Multimeter with LED/Diode Tests, Oscilloscope and More

LCR-Reader at DigiKey

Buy LCR-Reader at DigiKey LCR-Reader at DigiKey

LCR-Reader / Smart Tweezers Comparison

LCR-Reader and Smart Tweezers Model Comparisons

New LCR-Reader MPA Logger

Speed-up component testing 10 times with LCR-Reader-MPA Bluetooth Logger

LCR-Reader MPA Video Inroduction

LCR-Reader-MPA Video

LCR-Reader-MPA Introduction Presentation

LCR-Reader-MPA Presentation

LCR-Reader-MPA Pro

Now Available: LCR-Reader-MPA Professional

This prebundled task kit comes with:


LCR-Reader-MPA handheld LCR/ESR meter


All-in-one digital multimeter with 0.1% basic accuracy, 100 kHz test frequency and an unrivaled functionality.

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LCR-Reader-MPA-BT Bluetooth Data Acquisition Tool

LCR-Reader-MPA Bluetooth

LCR-Reader-MPA with remote recording of all measurement data; one-click pass/fail assessment.

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LCR-Reader-MPA Pro Task Kit

LCR-Reader-MPA Pro Task Kit

LCR-Reader-MPA Pro task kit includes extra accessories

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LCR-Reader LCR-meter

Lower-cost model with 0.5% basic accuracy and less features.

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LCR-Reader Pro Task Kit

LCR-Reader Pro Task Kit

LCR-Reader Pro Task kit with various accessories and NIST traceable calibration certificate

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LCR-Reader Colibri

LCR-Reader Colibri

Colibri has the same features and functions as LCR-Reader with the added ability to manually select test frequency

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Smart Tweezers ST-5S

Smart Tweezers

LCR/ESR meter with 0.2% basic accuracy and variable settings; NIST traceable calibration certificate

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Smart Tweezers with Bluetooth

Smart Tweezers ST-5S Bluetooth

ST5S-BT2 sends and recieve measurement data over Bluetooth connection for PC, Android and iOS

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Kelvin Probe Connector Kit Low Energy Probe Station

Kelvin Probe Connector Kit

Probe Station for LCR-Reader, MPA and Smart Tweezers models. Extra-Fine and Fine pin probes available.

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LCR-Reader-MP Multipurpose Tester


Discontinued; still available on Amazon only

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LCR-Reader Offset Calibration Board

Offset Calibration Board

Provides accurate measuements of parasitics for removal

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LED Test Tweezers from Siborg Systems

Smart LED Tester

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LCR-Reader SMD Test Tweezers

SMD Test Tweezers

Tweezer probes for multimeters with 4 mm jack plugs

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Bent Tweezer Probes

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Bent tips for LCR-Reader, LCR-Reader-MPA and Smart Tweezers models

Bent Tweezer Probes

Trade Shows

EPTECH On Demand

EPTECH On Demand

Siborg is virtually attending EPTECH On Demand, Canada's National Electronics Industry Trade Show. April 28th, 2021

Del Mar Electronics & Manufacturing Show

DMEMS 2020

Siborg was at the Del Mar Electronics & Manufacturing Show in San Diego, CA from September 16-17, 2020, Booth #233


IEDM 2019

Visit Siborg at IEDM 2019 in San Francisco, California from December 7-11 at Booth #20

Nepcon Vietnam 2019

Nepcon Vietnam 2019

LCR-Reader and new LCR-Reader-MPA was at Nepcon Vietnam, September 11-13 2019.

Siborg Systems Inc presented LCR-Reader-MPA at Nepcon Korea in Seoul from May 15 - 17, 2019

Nepcon South China 2019

Nepcon South China 2019

Siborg took LCR-Reader-MPA and LCR-Reader to Nepcon South China, April 24-26 2019.

LCR-Reader-MP: Multipurpose LCR-Reader

Now Available: LCR-Reader-MPA, New Generation of MP

Siborg has released a new model in the MP line, the LCR-Reader-MPA. The device features a new design with lighter weight, easier-to-read display, and 4 way-joystick navigation button. Features include 3 test signal levels, more accurate LED testing, and 0.1% basic accuracy.

LCR-Reader-MP is still available for a limited time, Amazon only, shop now.

LCR-Reader Multipurpose
LCR-Reader-MP Introductory VideoLCR-Reader-MP Introductory Video

Instant Evaluations With Just One Touch

The title says it all, Smart Tweezers will show you component value right when you touch it, no adjustments needed to the component type, test frequency, test signal, etc. Not only will it show the main impedance component L, C or R but also the parasitics, such as R for L, C and C for R.

Built for Simplicity

LCR-Reader Pro task kit in the LCR-Reader Store
Note: LCR-Reader Professional kit pictured; North American model
LCR-Reader is twice as light as Smart Tweezers ST-5 and also powered by Li-Ion rechargeable battery with a micro-USB charger connector. Basic accuracy of the new device is about 0.5% which is not as good as that of Smart Tweezers ST5 (0.2%) but about exceeds that of previous models of Smart Tweezers ST-1, ST-2 and ST-3. It also has gold-plated stainless steel tweezer tips. There is just one button that turns the device on and allows to change the measurement mode by a single button push: A (automatic), L (inductance), C (capacitance), R (resistance), and ESR (equivalent series resistance). All measurements are done automatically, test signal amplitude is fixed at 0.5 Volts, test frequency is automatically adjusted according to the component type and value. Similarly to Smart Tweezers, LCR-Reader in addition to the the main impedance component L, C or R it will also show the parasitics, such as R for L, C and C for R.

One of the problems with Smart Tweezers LCR-meter has been the price point. Depending on the region and resellers, Smart Tweezers can be from $300 to $700. Criticism about the screen being crowded has also been sounded on the ST5 model. For companies and professionals using Smart Tweezers, there are few issues, but for the everyday hobbyist, the price point is far too high. Siborg had attempted creating a new device with a lower price (not featuring a 1 Volt test signal) but the price cut was only 20%, and would not affect the overall market.

Around a year ago, development of the LCR-Reader began, based on the availability of new microchips and ideas of how to simplify the circuit without losing much of the accuracy. The result evolved into the prototype pictured (Fig 1.), a physically smaller and lighter device and cheaper manufacturing cost (compared to the Smart Tweezers LCR-meter).

The new LCR-Reader is powered by a Li-Ion battery, rechargeable via micro-USB. The device features a lower weight, with about 0.5% basic accuracy.

LCR-Reader akin to Smart Tweezers Similarities to the Smart Tweezers models include the gold-plated tweezer tips that have attributed to Smart Tweezers identifiable design, a one-button navigation, and a Li-Ion battery that charges via micro-USB. The new device features a 0.5% basic accuracy, which is slightly lower than the ST5 model, but the same as the ST2 model. The button navigation provides a simple touch solution to switching modes of operation; A (Automatic component recognition), R (Resistance), L (Inductance), C (Capacitance), and ESR (Equivalent Series Resistance). All measurements are automatic, test signal amplitude is 0.5 Vrms, test frequency is automatically selected according to the component type and value.
The photo to the left shows an example of the device's screen while measuring. AM shows that the LCR-Reader is measuring in Automatic Mode, Rs is the parasitic series resistance of the non-ideal inductor, 10 kHz is the test frequency being used, L shows that the component under evaluation is an inductance and 104.8 uH shows the inductance value in micro-Henries, the battery icon shows its charge level.

Calibration Fixture and Accuracy Verification

Siborg sent 4 randomly selected LCR-Readers to Navair Technologies in Toronto, one of Canada's leading Calibration Facilities for NIST certifications. The results returned were higher than expected, view the results and certificates here. New 4-wire and 2-wire Calibration Fixtures have Calibration Fixture for LCR-Reader and Smart Tweezersbeen created for all models of Smart Tweezers including older models and the LCR-Reader.
The calibration fixture uses 14 known components within the Smart Tweezers and LCR-Reader's measurement ranges. When a device is connected, the calibration fixture signals a different component with each button press. The measurement values are immediately available on the Smart Tweezers or LCR-Reader's display. These values can then be compared to the known values of the components to confirm or reject accuracy.

LCR-Reader or Smart Tweezers ST-5S: Which Device is Best for You?

At first glance the ST-5S and the LCR-Reader are nearly identical, so how do you choose which device is right for you?

First, you need to decide what you want your device to do; both ST-5S and LCR-Reader will automatically identify the type of component and measure for L, C, R and ESR instantly. The main differences between the devices is the functions they preform. The pen-sized device is just 1 oz. weight, making it perfect to stow in a bag or pocket. Both use a Li-Ion battery with micro-USB charging that last up to 80 hours continuous use. All measurements are instantly displayed on a bright OLED display that makes reading the screen easy even in less than suitable conditions.

The ST-5S is best for professionals and companies alike that require more features for better customizing specific measurements, as well as coming with an NIST traceable calibration certificate. The ST-5S allows user to change the test signal (with 0.5 and 1.0 Vrms), as well as variable tolerances of 1%, 5%, 10%, and 20%. This device also does continuity and diode testing, and showed active and reactive impedance components on the display. As one of the features that saves times for users, a semi-automatic offset subtraction feature automatically removes parasitics after set-up. The ST-5S is controlled by a joystick-like navigation; pushing the button directionally will change the test mode, test signal, etc., while pressing the joystick will open the menu to allow more customized measurements and features like changing the screen orientation.

The LCR-Reader is a more budget-friendly model along the same lines as the Smart Tweezers models. While the look and feel of the LCR-Reader is the same as the ST-5S; the LCR-Reader is a more stripped down version, with the basic functions to get the job done. This model does not come with a calibration certificate, or have features such as component sorting, diode, continuity or open circuit testing, nor variable test signals, utilizing only a 0.5 Vrms test signal. The LCR-Reader has a one-button navigation that changes the test mode with each press. The main selling feature of the LCR-Reader is the price, retailing for less than $200 nearly half the price of the ST-5S.

Smart Tweezers ST-5S, LCR-Reader and LCR-Reader-MPA Comparison

A comparison of LCR-Reader and previous models of Smart Tweezers is given in a Comparison Table:

LCR-Reader Model Comparisons PDF

Feature ST-5S LCR-Reader LCR-Reader-MPA
Basic Accuracy 0.2% 0.5% 0.1%
Automatic L, C, R and ESR measurements Yes Yes Yes
Manual L, C, R and ESR measurements Yes Yes Yes
Designated ESR measurements Yes Yes Yes
Variable Tolerances 1, 5, 10, 20% tolerances N/A 1, 5, 10, 20% tolerances
Continuity and Diode testing Yes No Yes
Parasitic offset subtraction Yes No Yes
Li-Ion battery with micro-USB Yes Yes Yes
Display OLED OLED Backlit LCD
Weight 1 oz. 1 oz. 1.35 oz.
NIST Traceable Calibration Certificate Yes Yes Yes
Navigation 4-way joystick One-button 4-way joystick

Technical Specs

Frequency 100 Hz - 10 kHz 100 Hz, 1 kHz, 10 kHz 100 Hz - 100 kHz
Test Signal Level 0.45, 0.9 +/- 5% Vrms 0.45 +/- 5% Vrms 1.0±0.05 Vrms, 0.5±0.02 Vrms, 0.1±0.01 Vrms, 0.1±0.01 V/td>
Source Impedance 62.5 Ω/1k Ω/16k Ω +/- 1% 62.5 Ω/1k Ω/16k Ω +/- 1% 62.5 Ω/1k Ω/16k Ω +/- 1%

Typical Accuracy

Resistance 0.2% 0.5% 0.1%
Capacitance 0.2% 0.2% 0.1%
Inductance 0.5% 0.2% 0.1%

Measurement Range

Resistance 0.05 Ohm to 10 Mohms 0.1 Ohm to 10 Mohms 0.1 Ohm to 20 MOhm
Capacitance 0.5 pF to 1 mF 2 pF to 5 mF 0.1 pF to 1F
Inductance 0.5 uH to 1 H 0.5 uH to 1 H 10 nH to 100 H

The Colibri: Variable Test Frequencies

The Colibri is the model right between Smart Tweezers and the LCR-Reader. Built from the LCR-Reader, the Colibri offers a 0.5% basic accuracy, lower price, and easy-to-use design but allows users the ability to select the test frequency for more specific measurements. Just like LCR-Reader, Colibri is able to automatically determine the type of component and the best test mode and parameters for the component under test. The main difference between the Colibri and LCR-Reader is the variable test frequencies on the Colibri. When the button on the device is pressed, Colibri will change the measurement mode (AM, L, C, R, ESR) with frequencies of 10 kHz, 1 kHz, or 100Hz available for selection. To reset the device to the default fully-automatic mode, simply hold the button down until the display flashes. The Colibri is available for around $200, making it affordable for non-professionals. This model does not come with the NIST traceable Calibration Certificate. Colibri modes

Feature Summary