SigmaProbe SP5 Smart Vehicle Circuit Tester

SigmaProbe Automotive Smart Circuit tester



  • ① Display screen: (320 * 240 DPI) TFT true color display
  • ② Operating temperature: 0-60 ° c (32-140 F °)
  • ③ Storage temperature: 40-70 ° c (-40-185 F °)
  • ④ External power supply: battery powered 12V or 24V
  • ⑤ Minimum operating voltage: 9V
  • ⑥ Maximum operating voltage: 30V
  • ⑦ Maximum measuring voltage: 150V
  • ⑧ Minimum measuring voltage: 0.1V
  • ⑨ Resistance measurement range: 1 ~ 200K ohm
  • ⑩ Current measurement range: 0 ~ 18A
  • ⑪ Maximum continuous current: 18A


  • Powerful: SigmaProbe™ support measures voltage, current, resistance, frequency, diode, etc, it also equips a basic oscilloscope function to help you sampling & analysis the electrical signals efficiently & simply, all in one device
  • Safety: 25 amp Fuse Protection & program short-circuit automatic protection design offer “double insurance” guard SigmaProbe™ device’s safety
  • Flexible: With 20 Feet test line with 2 type brass test probes plus extension cable and top led light, SigmaProbe™ suitable for all dark & narrow spaces.
  • Comprehensive Application: Application 9-30V working voltage for Motorcycles, Cars, Trucks, RVs & Boats.
  • User-friendly Design: Available 14 multi-language and support firmware online upgrade, SigmaProbe™ can extend more function & fix bug in the future.


We do our best to process & ship all orders as soon as possible. Most orders are processed within 1~3 days. We process orders between Monday-Friday and do not ship on weekends.

We're proud to offer worldwide shipping for all orders.

Shipping methorCostDelivery time
DHL(Preferred)Free3-7 days(Worldwide)
Fedex(Preferred)Free3-7 days (Worldwide)
UPSFree3-7 days (Worldwide)
EMSfree15-25 days(Worldwide)

Shipping methorCostDelivery time
DHL(Preferred)Free3-7 days
Fedex(Preferred)Free3-7 days
UPSFree3-7 days
EMSFree15-25 days

*Please note:

These are estimated delivery times only, therefore Sigmaprobe is not guaranteeing delivery dates.

Tracking your order:

Our orders always include tracking information that is normally sent via email within 48 hours after the order has been shipped. 


Please contact us via e-mail or Whatsapp if you need any assistance.

We are here for you.

+86 185 6670 3079

SigmaProbe Smart Circuit Tester

Diagnose Vehicle Circuit Problems Efficiently!

Sigmaprobe circuit tester

Do More with SigmaProbe!

Overload   Protection



Resistance   Test



AC and DC   Voltage Test

AC and DC 

Voltage Test

Overload   Protection

Short Circuit Protection

Resistance   Test

Components Activation

AC and DC   Voltage Test

Professional Diagnosis

Short Circuit Protection

Short Circuit Protection

Components Activation

Components Activation

Professional Diagnosis

Professional Diagnosis

The Only Circuit Tester You'll Ever Need!

SigmaProbe Covers 90% Automotive Circuit Testing Scenarios.

Sigmaprobe Smart test

Smart Test

One click to identifies voltage, resistance, positive/negative

SigmaProbe™ recognizes the measured signal and displays values of VDC, OHM, AMP, P/N automatically in one mode.

No need to switch between different test modes.

Sigmaprobe Multimeter

Multimeter Mode

No multimeter is needed to test DIO\HZ\Duty Cycle

SigmaProbe™ support voltage, diode, current, resistance, & frequency test.Testing the condition of the wiring or components of an automotive circuit system through continuity testing

Multimeter Mode
Sigmaprobe Oscilloscope

Oscilloscope Mode

Help you sampling & analysis the electrical signals efficiently

Maximum 50KHz bandwidth, 800KSa/s sampling rate.

The SigmaProbe™ sampling time interval setting is available. which is used to measure AC voltages and can be used on any AC voltage or pulse waveform signal.

SigmaProbe™ can be used for tests such as checking diode ripple in alternators, ABS sensors, crankshaft sensors, etc.

Sigmaprobe relay test

Relay Test

Even newbies can get you up and running quickly

SigmaProbe™ offer 2 types of common automotive relay (5-terminal relay and 4-terminal relay) connection guide diagrams.

Easy to diagnose the relay condition. No worry mistake connection burned the component.

Relay Test
Sigmaprobe Injector Test

Injector Test

4 Pulse signal test, know your injector status more accuately

The SigmaProbe™ outputs different pulse signals to the injector and checks the spraying status of the injector. This function can help diagnose injector conditions. It can be used with any fuel pressure tester.

Sigmaprobe positive/negative test

Positive / Negative Test

Automatically judge the positive/negative poles and display on the screen

Use the Probe Tip to find the positive/negative wire of the power supply.

Through the identification of the probe, the positive interface voltage or negative grounding icon will be displayed on the screen.

Through the identification of the probe, the positive interface voltage or negative grounding icon will be displayed on the screen.

Positive / Negative Test
Component Activation

Component Activation

Test isolated components instantly by hooking up the SigmaProbe™ to the car battery

SigmaProbe™ has 3 activation modes:

MOMENT (moment activation)

LATCH (lock activation)

PULSE (pulse activation).

It's able to apply battery power or ground right to the probe tip gives you the ability to activate and dynamically test electrical components such as lights, motors, horns and other.

(Note: Can not be used for ECU, sensor module casually, there is a risk of burning)

Sigmaprobe power supply

0-5V Power Supply

Supports 0-5V voltage power supply, simulate the voltage output by the sensor to the ECU

Simulate the voltage output by the sensor to verify the wiring to the ECU. Sigmaprobe supports a power supply voltage of 0-5V. 

Note: 0-5V power supply mode designed as an active mode, but its function is different from the component activation mode. It can adjust the voltage output under 5V and limit the current to 100mA.

0-5V Power Supply

What are the Advantages of SigmaProbe?

High-quality accessories 

all in one storage

The Sigmaprobe and all accessories are stored in the tool box.

It is easy to carry, store and use, and is not easy to lose.

Double Overload Protection, Safe and Easy to Use

Power supply reverse protection

Built-in overload protection

25A circuit breaker

copper inner core

All copper inner core, PE line pipe 

Genuine materials, durable & wear-resistance

Customized 20ft test line 

for automotive circuit testing environment

LED light

LED Front Light 

Lighting up the surrounding night and day

Metal Probe Tip

Low power consumption, 

high performance

Humanized hook design

Easy to handle and store.

Fully enclosed anti electric

shock alligator battery clip

4 Steps Easy to Use the SimgaProbe Diagnose Circuit Problem

STEP 1: SigmaProbe Main Unit Connect to Alligator Clips

Connect SigmaProbe main unit to alligator power connector

STEP 2: Alligator Clips Tie To Battery

Alligator clips connect to Positive & Negative of the battery

STEP 3: Click "OK" Button In SigmaProbe

5 keys operating to choose the test function for working

STEP 4: SigmaProbe Start Diagnose

Connect Probe to circuit, relay, injector anywhere you need check to start electronic diagnose

Not Just for Car

18A maximum continuous current flow | 0.1-150V measuring range | 9-30V working voltage

Sigmaprobr support 9-30V vehicle

SigmaProbe Currently Support 14 Languages

Sigmaprobe Currently Support 14 Languages

Support languages

SigmaProbe Currently Support 14 Languages

Sigmaprobe other features
background setting

    Firmware Update

Keep up-to-date with the latest product features.

online update

Background Setting 

"Bright Mode" or "Dark Mode" , Choose as You Like

Sigmaprobe tester

SigmaProbe Specifications

 Display screen: (320 * 240 DPI) TFT true color display
 Operating temperature: 0-60 ° c (32-140 F °)
 Storage temperature: 40-70 ° c (-40-185 F °)
 External power supply: battery powered 12V or 24V
 Minimum operating voltage: 9V
⑥ Maximum operating voltage: 30V

⑦ Maximum measuring voltage: 150V
 Minimum measuring voltage: 0.1V
 Resistance measurement range: 1 ~ 200K ohm
 Current measurement range: 0 ~ 18A
⑪ Maximum continuous current: 18A

Frequently Asked Questions

Q: When will the order ship out?

A: Order ship out within two working days. The tracking number will update under order information.

Q: How can I contact SigmaProbe when I need help for SigmaProbe?

A: SigmaProbe offers technical support; keep your order No. to contact when you need after-sales service.

Q: When will the order ship out?

A: The parcel will be shipped by express way; estimate 3-9 working days arrive.

Q: What's the warranty?

A: SigmaProbe support 30 days return with, two-year free warranty.

Q: Does the cost including shipping? Do I pay for shipping fee?

A: The price including the shipping fee, no need to pay an extra shipping fee.

Q: If I need a large quantity, what's the price?

A: SigmaProbe is considering a dealer partnership, please contact

Q: Where can I get the SigmaProbe guide?

A: SigmaProbe comes with an instruction user manual. You can visit to check the instruction video as well.

Q: Is it possible free duty delivery to Europe?

A: SigmaProbe EU storage will start delivery from 1st June, supporting free-duty delivery to the EU.

Try Yours Completely Risk Free

We offer a 30-day no-questions asked money back guarantee on all orders. We make sure all of our customers are 100% delighted with their purchase.