AUTOOL SDT106 · Compact Smoke Leak Detector with Built-In Pump
Hang Portable Smoke Testing Close to the Vehicle
Use this compact automotive smoke leak detector for low-pressure smoke checks without a separate shop-air source. Hang it near the test area and trace visible smoke paths. SDT106 starts producing smoke in about five seconds for permitted EVAP, intake, exhaust, fuel-tank, vehicle-sealing, and line-fitting checks, with protection for cold operation and overheating.
- Built-In Pump, No Shop Air
- About 5-Second Smoke Start
- Hook-Mounted Test Position
- Permitted Low-Pressure Systems
- Cold And Overheat Protection

Key Features
Built-In Pump with an Integrated Work Light
Smoke Starts in About 5 Seconds
The detector starts producing smoke quickly after power-on. Allow the test line to fill with smoke, then inspect for escaping smoke to locate leaks.
Low-Pressure Leak Detection
Supports low-pressure checks on EVAP, intake, exhaust, fuel-tank, vehicle-sealing, and common line-fitting areas.
Built-In Air Pump
No extra air pump is required. The built-in air pump lets the unit operate without a separate shop-air supply.
Lightweight Hook Design
The compact body and hook design make it easy to position the unit near the test area, transport it, and store it after use.
Overheat and Low-Temperature Protection
Overheat protection turns off power when the unit exceeds 75°C, and the unit can operate at temperatures down to -20°C.
3 Years Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.
Safety & Compatibility
Confirm System Pressure and Keep Ignition Sources Away
12V Power and Built-In Air Pump
Connect SDT106 to a 12V DC battery before use. The built-in air pump provides the test airflow, so you do not need an external compressor.
Use Visible Smoke Within the Low-Pressure Limit
SDT106 outputs less than 12 psi and less than 5 L/min. Because it has no pressure gauge, flow meter, or flow adjustment, use visible smoke to locate permitted low-pressure leaks and stay within the service limits for the system you are testing.
Testing Oil Is Not Included
Testing oil is not included. Use liquid paraffin or baby oil and add 10–15 mL before first use.
Limit Continuous Use to 8 Minutes
Do not run SDT106 continuously for more than 8 minutes. Let the unit rest between test cycles.
75°C Overheat Protection
Automatic overheat protection shuts off power if the internal temperature exceeds 75°C. Let the unit cool before using it again.
Operating Temperature and Hot Surfaces
SDT106 supports operation down to -20°C. The round metal housing can become hot during use, so avoid touching hot surfaces directly.
Follow the Service Limits for the System
Do not introduce smoke into any component or system excluded by the vehicle or component service procedure. SDT106 is for permitted low-pressure smoke testing, not high-pressure system testing.
Use Smoke to Locate the Leak
Use visible smoke to locate the leak area, then repair and retest. If no smoke appears, recheck isolation, flow, and the test setup before continuing.
Never Refill While Running
Do not refill testing oil while SDT106 is running.
No Pressure Gauge Provided
Do not estimate test pressure from the unit because SDT106 has no pressure gauge.
Stay Within Low-Pressure Limits
Keep the test within the low-pressure range allowed by the vehicle or component service procedure.
Specifications
SDT106 Specifications
| Smoke Output & Protection | |
|---|---|
| Working Principle | Low Oxygen Combustion |
| Test Oil Filling Volume | 10-15ml |
| Rated Output Pressure | <12 psi machine-rated output; use the target-system procedure. |
| Rated Output Flow | <5L/min |
| High-Temperature Protection | Stops working above 75°C |
| Response Time | Produces smoke in 5 seconds |
| Power & Physical Size | |
| Input Power | DC12V |
| Rated Power | 50W |
| Net Weight (Main Unit) | 3.5kg |
| Main Unit Dimensions | 110mm*135mm*210mm |
| Monitoring & Controls | |
| Air Source Type | Built-in Air Pump |
| Mode Output | Smoke Mode |
Manual & Downloads
Use the Manual for Setup and Test Pressure

AUTOOL SDT106 User Manual
Open the PDF manual for SDT106 built-in pump operation, portable smoke testing, permitted system checks, test-oil handling, safety, maintenance, and troubleshooting.

Package
What’s Included
- Main UnitAUTOOL SDT106 smoke leak detector
- Power Cable12V DC battery clamp cable
- Smoke HoseSmoke output hose
- AdaptersCone adapter, airbag adapter, rubber plugs, and accessories
- Oil BottleEmpty testing oil bottle included; testing oil is not included
- DocumentationUser manual and SDT106 retail box
FAQs
Pump, Light, and Adapter Questions
What Testing Oil Should I Use for SDT106?
Use liquid paraffin or baby oil as the testing oil. Testing oil is not included; have liquid paraffin or baby oil ready before use.
How Much Testing Oil Should I Add?
For first use, add 10–15 mL testing oil. Do not exceed this range. Only refill when the smoke becomes thin, limit each fill to no more than 15 mL, and pour out the remaining oil before adding fresh oil.
Does SDT106 Need a 12V Battery?
Yes. The AUTOOL SDT106 smoke leak detector requires a 12V DC battery connection to operate. Confirm the power supply before starting a test.
How Long Can SDT106 Run Continuously?
Do not run the detector for more than 8 minutes continuously. Let the unit rest between uses.
What Happens If the Unit Gets Too Hot?
If the detector exceeds 75°C, automatic overheat protection turns off the power. Wait for the detector to cool before operating it again.
Which Systems Can the SDT106 EVAP Smoke Machine Test?
For low-pressure exhaust checks, SDT106 can be used as an exhaust leak smoke tester. It also supports EVAP, intake, fuel-tank, vehicle-sealing, and line-fitting areas. Do not introduce smoke into any component or system that the vehicle or component service procedure excludes from smoke testing.
Can I Use SDT106 as a Car Smoke Tester?
Yes. SDT106 supports 12V cars, motorcycles, snowmobiles, off-road vehicles, ATVs, light trucks, and speedboats. It is intended for low-pressure vehicle leak detection.
Can SDT106 Be Used for High-Pressure System Testing?
SDT106 is designed for low-pressure smoke leak detection, with rated output pressure below 12 psi. Do not use it as a high-pressure leak tester.
What Accessories Are Included?
Check the product listing or your selected package option for the exact items included. The package includes the SDT106 main unit, 12V DC battery clamp cable, smoke hose, cone adapter, airbag adapter, and rubber plugs. It also includes other accessories, an empty oil bottle, user manual, and retail box. Testing oil is not included.
How Does SDT106 Differ from Other AUTOOL Smoke Leak Detectors?
- SDT106 is a built-in-pump model with Smoke Mode, 12V DC power, <12 psi output pressure, and <5 L/min output flow.
- SDT203 adds a pressure gauge and flow adjustment.
- SDT205 and SDT205S support Air Mode and Smoke Mode.
- SDT206 uses dual built-in air pumps.
- SDT208 supports high pressure and low pressure modes.
What Should I Do If the Smoke Becomes Thin?
Stop operation first. Drain the remaining oil in the detector, then add fresh liquid paraffin or baby oil. Do not add more than 15 mL at one time.
How Long Is the Warranty?
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.





