Here you can get help before purchase and support after purchase. If you have any questions about the SigmaProbe products then we're in this page to assist you.

Download & Update

The SigmaProbe Supports Online Update

Software version: V30
V30 updated information:
1. Used to upgrade V26 version PCB
2. The input Maximum voltage is to 30V. When the input voltage (battery voltage) is greater than 30V, the screen will display the current voltage value, and automotive disconnect the device.
3. Fix the display problem of automatic test.
4. Fix the bug of obtaining the hardware version number.
5.Add ciruit breaker function
6.Add negative activation function
Zip Download link

User manual download link: 

SigmaProbe user manual

Every set of Sigmaprobe automotive circuit tester includes the user manual.

The user manual gives a detailed introduction to all aspects of Sigmaprobe automotive circuit tester, including appearance introduction, parameters introduction, packing list, function introduction, warranty period, etc. 

Download link:

SigmaProbe Circuit Tester Function Operation Videos

How to operate the Smart Test function?

How to use the Multimeter Mode?

How to use the Oscilloscope Mode?

How to use the Relay Test Mode? 

How to use the Injector Test Mode 

How to use the Component Activation Mode?

How to use the Positive and Negetive Test Mode?

How to use the 0-5V Power Supply Mode? 

Frequently Asked Questions

Q: Where can i buy replacement parts?

A: Our Sigmaprobe circuit tester is includes the parts, if your part has damaged, you can contatc our sales and buy from us. 

Q: Why should i buy a SigmaProbe?

A: Our products are designed to help you save time and money in electrical diagnostics.

Q: Where can i find training videos?

Q: Where are you located/ How can i contact SigmaProbe?

A: Address: Rm709, Block 7, Fuquan Building, Qingquan Road,LongHua. Shenzhen 518109, China. or contact us toll free at +86 18566703079.

Q: What do I do if my Sigmaprobe is broken (In warranty or out of warranty) ?

A: Call 86-185-6670-3079 and ask for TEK support or email

One year warranty

SIGMAPROBE Technology promises to provide warranty service for 1 year from the date of original purchase, if this product is purchased from an official channel, which must meet the following conditions: 

1) The warranty are limited to repairing or replacing new equipment, without additional cost, but need to mention for regular sales invoices or copies ofinvoices. 

2) The warranty does not cover the unauthorized disassembly of this product due to flooding, lightning strikes, or outside repair shops not authorized bythe company ,The personnel have repaired it and considered damage caused by improper use. 

3) SIGMAPROBE Technology is not responsible for any damages caused by use,misuse or installation and testing. Some countries limitations on the duration ofimplied warranties are not allowed, so the above limitations may not apply to you. 

4) All information in this manual is based on the latest and effective information at the time of publication, and there is no guarantee of its accuracy or completeness. SIGMAPROBE Technology reserves the right to make changes at any time without notice.

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