facebook 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 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 Professional

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 presenting at EPTECH On Demand, Canada's National Electronics Industry Trade Show. September 15th, 2021 at 3:20 PM EST

Del Mar Electronics & Manufacturing Show

DMEMS 2020

DMEMS 2020 was rescheduled for May 4th-5th 2022


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, LCR-Reader China, Taobao 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, LCR-Reader will automatically show you all you need to know with just a touch, with no set-up required. When a component is between the gold-plated tweezer tips, LCR-Reader will determine the type of component, main impedance value L, C or R, but also any ESR value and the frequency used.

Built for Simplicity

LCR-Reader Pro task kit in the LCR-Reader Store
Note: LCR-Reader Professional kit pictured; North American model
LCR-Reader handheld multimeter is a lightweight device that can determine and test components with just a touch of the gold-plated tweezer probes. When a component is between the tweezers' probes, LCR-Reader will automatically determine the type of component and select the best test mode and frequency to use for the component. All measurements are done using a 0.5% basic accuracy and data is instantly displayed on the OLED screen. The device will show the test mode (L, C, or R), main impedance value, secondary value (ESR) and test frequency used.

Controlled by a one-button navigation, the device will cycle through the test modes with each touch. These modes include Inductance, Resistance and Capacitance, ESR (Equivalent Series Resistance) and Auto mode which allows the device to select the component type to use.

The device is powered by a Li-Ion battery and recharged via micro-USB. The 80-hour continuous battery life, bright OLED display and 1 oz. lightweight, compact design makes LCR-Reader ultimately portable and useful for in-field tasks.LCR-Reader akin to Smart Tweezers

The display, shown on the left, is an example of LCR-Reader during a measurement. AM shows that the device is set to 'Automatic Mode' and is measuring a 'C' Capacitor with 20.08 pF, using a 10 kHz test frequency. The value on the top of the display is the secondary value, shown as Rs, the parasitic series resistance. A battery icon indicates the remaining charge of the devices.

Calibration Fixture and Accuracy Verification

To verify the LCR-Reader's accuracy, Siborg sent 4 randomly selected devices to Navair Technologies, one of Canada's leading calibration facilities for NIST certifications in Toronto, Ontario. The results returned were higher than expected, with basic accuracy closer to 0.5% than the believed 1%. View the results and certificates here. Calibration Fixture for LCR-Reader and Smart Tweezers

New 4-wire and 2-wire Calibration Fixtures were created for LCR-Reader and Smart Tweezers devices, including older models. The calibration fixture uses 14 known components within the LCR-Reader's measurement ranges. When connected, the calibration fixture signals a different component with each button press. The measurement values displayed are compared to the actual values of the components to confirm or reject the accuracy.

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

LCR-Reader is an alternative to the Smart Tweezers line of handheld digital multimeters. The tried-and-tested design of a set of tweezer probes combined with a multimeter that requires no set-up between measurements. There are a few differences between the devices, so which is best for you?

LCR-Reader was created a more affordable device, which was achievable by removing some features and LCR-Reader uses the same design as Smart Tweezers, with tweezer probes combined with a digital multimeter. Unlike Smart Tweezers, LCR-Reader is priced lower, around $200 USD, making it more affordable for hobbyists and non-professionals.

All measurements are done with a 0.5% basic accuracy, which is slightly lower than the 0.2% accuracy offered by Smart Tweezers. Smart Tweezers also offers more test signals (0.5 and 1.0 Vrms), variable tolerances (1, 5, 10 and 20%), more features including continuity and diode testing, and a semi-automatic offset removal. Smart Tweezers also uses a joy-stick navigation which allows for more customization for measurements, including the ability to change basic test parameters from the main display.

LCR-Reader is a far more stripped-down model with only LCR and ESR measurements, 0.5 Vrms test signal, and one button navigation, but these all contribute to the ability for a lower priced device.

For a better comparison between LCR-Reader and Smart Tweezers devices, consult the comparison table below. The table also outlines the features found on LCR-Reader-MPA, Siborg’s most recent device that offers more features and higher accuracy than both LCR-Reader and Smart Tweezers.

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, 0.5, 0.1 Vrms
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.

Feature Summary

  • Automatic measurement of L-C-R and ESR
  • Basic Accuracy of 0.5%
  • Automatic best range
  • Li-Ion rechargeable battery, Optional USB Charger
  • 28 gram (1 oz) weight
Colibri modes