What models of LCR-Reader and Smart Tweezers are available?

• The first model of Smart Tweezers ST-1 was released in 2004
• Smart Tweezers ST-2 was released in 2007
• A rechargeable version of the ST-2, the STIC, was released in 2008
• The ST-2.3 was released in 2010 and featured a new LCD display
• The professional model, the ST-5, was released in November of 2011
• The LCR-Reader was released in September of 2013. This model is intended for the consumer electronic market
• The ST-5S was released in 2014; it features the same functionality as the ST-5 with an updated look akin to the LCR-Reader
• The LCR-Reader-MPA was released in September of 2019. This model with 0.1 basic accuracy, is intended for the professional users in electronics, aviation, military, etc. It offers a variety of functions: AC/DC voltage and frequency measurements, LED/diode test, signal generator, and oscilloscope.
• The LCR-Reader-R2 was released in December of 2021. This 0.1 basic accuracy model offers LCR/ESR measurements, LED/diode test and Analog Signature Analysis
• The LCR-Reader-R3 was released in August of 2023. This 0.2 basic accuracy model offers LCR/ESR measurements, LED/diode test, Analog Signature Analysis and Multilingual User interface
• The LCR-Reader-MPB was released in September of 2025. This professional model offers all features of the previously released models.

 

What is the LCR-Reader mostly used for?

LCR-Reader is an efficient device for identifying and measuring Surface Mount Technology (SMD). It is able to automatically determine the type of component and measure accordingly, saving time and effort on the user’s part.

How accurate is LCR-Reader?

Typical basic accuracy of the LCR-Reader-R1 model is 0.5%. All later models offer 0.1% basic accuracy

 

Can LCR-Reader be used on a PCB circuit?

Yes, if the user understands the circuit, LCR-Reader can be used to test components on a PCB.

 

Can LCR-Reader measure current?

LCR-Reader is able to measure AC/DC voltage. LCR-Reader-MPA/MPB, R2 and R3 and offer many other functionalities in addition to LCR measurements.

 

LCR-Reader automatically turns off too quickly. Sometimes it hinders me from my work.

LCR-Reader-R1 is designed to turn off after 30 seconds of not being used. All later models allow changing the turn-off time.

 

I prefer to keep tweezers in my left hand. Is LCR-Reader only for right handed-use?

Sort of, though the device is operable with both hands, the screen orientation can be changed on all LCR-Reader models except for LCR-Reader-R1 as well as on Smart Tweezers models.

 

Does LCR-Reader come with a calibration certificate?

Most do. Make sure that when you purchase your device, the Calibration Certificate is included.

 

Is LCR-Reader design patented?

The patent is in force in Europe, USA, Canada, Japan, China, Taiwan, Hong Kong and India.

 

The battery discharges very quickly, what was done wrong?

The general reason for batteries to quickly deplete on the LCR-Reader is due to the device constantly measuring when it shouldn’t be. This could be caused by high frequency measurements (such as 10 kHz) or if the tips have been recently changed a piece of debris could be caught between the tips and the flex cable. To fix this problem, remove the tips and clean the flex, tips and screws with isopropyl alcohol.

 

Why would I need an extra pair of tips for the LCR-Reader?

The LCR-Reader’s tips are gold plated which can wear out over time. The quality of the surface being touched will effect the lifespan, but they usually last about 2-3 years with moderate usage. Worn out tips may effect readings.

 

I’ve replaced the tips on my LCR-Reader but now the device shows a measurement and won’t turn off. Why?

There are a few reasons as to why the device won’t turn off. You can read a helpful guide as to how to remove these false measurements here.

 

What if my LCR-Reader needs replacement parts besides the tips, such as a screen or battery?

You can buy all sorts of accessories and replacement parts at the LCR-Reader Store. If you are unsure of what model of device you have, you can look at the Smart Tweezers Catalog. There is an online repair guide available here.

 

Where can I purchase an LCR-Reader?

LCR-Readers are available on the LCR-Reader Store, on Amazon.com, Amazon.ca, Amazon Europe sales channels