Autool SDT103 Automotive Smoke Tester with External Flow Meter & 12V Power for EVAP Leak Detection

The AUTOOL SDT103 is a reliable, compact EVAP smoke leak detector engineered for precise automotive diagnostics. Powered by a 12V DC supply and using an external air source, it produces smoke in seconds to help you pinpoint leaks in vacuum lines, intake systems, EVAP components, and more. The unit includes a built-in flow meter for pressure control, along with overheat and freeze protection to keep your testing safe and consistent.

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Key Features

• Produces smoke within 10–30 seconds

• Requires an external air source (no internal pump)

• Built-in flow meter for adjustable pressure control

• Auto shutoff above 75 °C to prevent overheating

• Cold-resistant: operates down to −20 °C

• Powered by any 12V car battery

• Compact and portable: easy to hang in the engine bay

• Works on cars, bikes, light trucks, snowmobiles, ATVs, and more

• Uses baby oil or liquid paraffin (10–15 ml fill)

• Includes 3-year warranty

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Use Cases

• Diagnose vacuum leaks causing engine misfires or poor idle

• Locate hard-to-find EVAP leaks triggering check engine lights

• Identify turbo system or boost pressure loss

• Verify hose, line, or gasket seal integrity during installation

• Essential for workshops, mobile mechanics, and DIY users

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Technical Specs

• Power Supply: 12V DC
• Outlet Pressure: 3.2 kPa
• Oil Capacity: 10–15 ml
• Operating Temp: −20 °C to +75 °C
• Smoke Output: ~10–30 seconds after activation

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How To Use

1. Fill the oil reservoir with 10–15 ml of baby oil or paraffin.

2. Hang the SDT103 in the engine bay using the attached hook.

3. Connect the unit’s power clips to a 12V vehicle battery.

4. Connect the smoke output hose to the target system or pipe.

5. Connect external air source and open airflow valve.

6. Activate the device and observe the flow meter.

7. Wait 10–30 seconds for visible smoke.

8. Use a flashlight or inspection light to locate leak points.

9. Turn off the unit and allow to cool after use.

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Download User Manual (PDF)

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What’s in the Box

1 × SDT103 Smoke Leak Detector
1 × Power Cable (Battery Clips)
1 × Smoke Hose
1 × Cone Adapter
1 × Oil Filler Bottle
1 × Instruction Manual