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AUTOOL SDT103 EVAP Smoke Machine with Flow Meter & Adjustable Airflow
US$90.00
Key Features
- Fixed 0.46 PSI Output
- Flow Feedback + Control
- Shop-Air Powered
- Airbag & Cone Adapters
- Fixed 0.46 PSI Output: Uses controlled 3.2 kPa / 0.46 psi output for EVAP-oriented low-pressure testing.
- Flow Feedback + Control: See relative airflow through the flow meter and adjust output for different pipe volumes and test conditions.
- Shop-Air Powered: Requires an external compressed-air source; rated flow above 10 L/min supports steady workshop use.
- Airbag & Cone Adapters: Included sealing adapters help close intake and pipe openings instead of relying on improvised plugs.
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- 3-Year Warranty Main unit 3 years · Accessories 1 year
- 90-Day Returns Eligible returns within 90 days
- Official Store Genuine products · Direct support
AUTOOL SDT103 · 0.46 psi EVAP Smoke Leak Detector with Flow Control
Low-Pressure EVAP Testing with Visible, Adjustable Airflow
The AUTOOL SDT103 is an EVAP smoke tester for low-pressure line checks. It uses an external air source and 12V DC vehicle power. Use 10–15 mL liquid paraffin or baby oil as testing oil. A visual airflow meter helps you monitor flow while locating small leaks in EVAP, intake, exhaust, fuel-tank, line-fitting, and vehicle-sealing areas.
- 3.2 kPa / 0.46 psi EVAP
- Visual Airflow Meter
- Adjustable Smoke Flow
- External Air Source
5 SecondsSmoke Output
1.15 kgMain Unit Weight
12VVehicle Power Requirement
3 YearsMain Unit Warranty
Core leak-detection capabilities
Key Features
SDT103 combines a fixed 3.2 kPa / 0.46 psi EVAP-focused output with visible airflow monitoring and adjustable smoke flow. The main unit includes 3-year warranty support.
EVAP-Focused 3.2 kPa / 0.46 psi Testing
SDT103 is designed for EVAP system testing with an output pressure of 3.2 kPa / 0.46 psi, helping reduce the risk of damage from excessive pressure. Designed for low-pressure EVAP smoke testing at 3.2 kPa / 0.46 psi.
Visual Airflow Meter
The external flow meter shows the current airflow, making it easier to adjust smoke output and protect the system under test.
Adjustable Smoke Flow
The airflow regulator helps adjust smoke flow for different test lines. Avoid excessive pressure and use the minimum practical airflow for the test.
Quick Smoke Generation
The unit generates smoke quickly to improve leak-check efficiency. Actual line filling time depends on line volume, adapter setup, airflow, and test conditions.
External-Air Setup
SDT103 accepts shop air or an external compressor through its air-source interface, then lets you monitor and adjust airflow at the unit.
Airbag Adapter Sealing Support
The airbag adapter supports test-port sealing during leak checks.
Engine, Lines, Vehicle Sealing and Fuel-Tank Checks
Supports intake system, exhaust system, throttle, intercooler, crankcase, oil seal, and line-fitting leak checks. Can help inspect vehicle sealing areas, fuel-tank leaks, valves that do not close fully, and air or water leak paths for low-pressure smoke checks.
Low-Pressure Systems Only
Use SDT103 only for low-pressure systems that the applicable vehicle or component service procedure permits for smoke testing. Do not use it on high-pressure systems or excluded components.
Compact Portable Design
The compact body is designed for carrying, storage, and positioning around the engine bay.
Grouped Controls and Connections
The handle, flow meter, smoke switch, power socket, air source interface, and smoke output are grouped together for quick component identification during setup.
Overheat and Low-Temperature Protection
The protection system shuts down power above 75°C and supports operation down to about -20°C.
12V Vehicle Coverage
Compatible with 12V cars, motorcycles, snowmobiles, off-road vehicles, ATVs, light trucks, and speedboats.
3-Year Warranty Support
Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy
Step-by-step smoke leak testing
Step-by-Step Instructions
SDT103 separates supplied airflow, pressure control, smoke generation, and visual leak location into a low-pressure EVAP test process.
Step 01
Add Testing Oil
Fill 10–15 mL baby oil or liquid paraffin into the detector before first use. Do not overfill.
Step 02
Connect the Test Line
Access the system to be tested and position the detector as needed. Disconnect the line you want to test, then connect it to the smoke output hose or the adapter that matches the selected test port.
Step 03
Connect External Air Source
Connect shop air or an air compressor to the air source interface. SDT103 does not have a built-in air pump.
Step 04
Connect 12V DC Power
Connect the detector to a 12V DC vehicle battery, then turn on the power switch to start the detector.
Step 05
Open Airflow and Start Smoke
Gently turn the airflow regulator valve to open airflow, then switch on smoke generation. Observe the flow meter while testing.
Step 06
Locate Leaks
The line under test can fill with smoke in about 30 seconds, depending on system volume and setup. Inspect for escaping smoke to locate leaks and use a headlamp if necessary.
External air, fixed EVAP pressure, airflow adjustment, testing oil, and low-pressure limits
Safety & Compatibility
SDT103 uses an external air source, keeps the EVAP test output fixed at 3.2 kPa / 0.46 psi, and lets you monitor and adjust airflow. Adjust airflow gradually, but do not treat airflow control as a way to raise test pressure.
External Air and 12V Power Are Required
SDT103 has no built-in air pump. Connect a shop air supply or external compressor to the air inlet, then connect the unit to a 12V DC vehicle battery before smoke testing.
Test Output Is Fixed at 3.2 kPa / 0.46 psi
SDT103 regulates the incoming air to a fixed 3.2 kPa / 0.46 psi EVAP test output. The compressor supplies air to the unit; its supply pressure is not the pressure applied directly to the test line.
Adjust Airflow Gradually
Start with the airflow regulator near minimum, then increase flow only as needed. Use the flow meter to watch airflow through the connected test line; changing airflow does not increase the unit’s fixed test pressure.
Testing Oil Is Not Included
Testing oil is not included. Use liquid paraffin or baby oil and add 10–15 mL before first use.
Refill Only When Smoke Becomes Thin
Add fresh oil only when the smoke output becomes thin. Drain the remaining oil first, then add fresh oil without exceeding 15 mL at one time.
Limit Continuous Use to 8 Minutes
Do not run SDT103 continuously for more than 8 minutes. Automatic overheat protection shuts off power above 75°C. Let the unit cool before restarting.
Operating Temperature and Hot Surfaces
SDT103 supports operation down to -20°C. The round metal housing can become hot during use, so avoid touching hot surfaces directly.
Use Only for Permitted Low-Pressure Systems
Use SDT103 only where low-pressure smoke testing is permitted. Do not use it for direct high-pressure automotive A/C pressure testing or on systems excluded by the vehicle or component service procedure.
Compare AUTOOL smoke leak detector models
Compare Smoke Leak Detector Models
Compare AUTOOL smoke leak detector models by air source, pressure, output flow, operating mode, gauges, flow control, oil handling, vehicle power compatibility, and other model-specific features.
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| Specification | Model 1AUTOOL SDT203 | Model 2AUTOOL SDT50 | Model 3AUTOOL SDT60 | Model 4AUTOOL SDT100 | Model 5AUTOOL SDT101 | Model 6AUTOOL SDT102 | Model 1AUTOOL SDT103 | Model 8AUTOOL SDT106 | Model 9AUTOOL SDT205 | Model 10AUTOOL SDT205S | Model 11AUTOOL SDT206 | Model 12AUTOOL SDT208 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Core Output and Power | ||||||||||||
| How It Works | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion | Low-Oxygen Combustion |
| Input Power | 12V DC | 12V DC | 12V DC | 12V DC | 12V DC / 5A | 12V DC | 12V DC / 5A | 12V DC | 12V DC | 12V DC | 12V DC | 12V / 24V DC |
| Testing Oil Fill Volume | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL | 10–15 mL |
| Rated Output Pressure | <15 psi | <10 psi | <10 psi | <10 psi | 3.2 kPa (0.46 psi) | <10 psi | 3.2 kPa (0.46 psi) | <12 psi | <15 psi | <15 psi | <18 psi | <10 psi EVAP / 35 psi Standard |
| Rated Output Flow | <6 L/min | <5 L/min | <5 L/min | <5 L/min | >10 L/min | >6 L/min | >10 L/min | <5 L/min | <6 L/min | <6 L/min | <6 L/min | <15 L/min |
| Rated Power | 65 W | 50 W | 50 W | 50 W | 48 W | 48 W | 48 W | 50 W | 65 W | 65 W | 70 W | 80 W |
| High-Temperature Protection | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C | Automatic shutdown above 75°C |
| Response Time | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds | Produces smoke in 5 seconds |
| Monitoring and Control | ||||||||||||
| Flow Meter Window | Included | Not included | Not included | Not included | Not included | Not included | Included | Not included | Not included | Included | Included | Included |
| Pressure Gauge | Included | Not included | Included | Not included | Not included | Included | Not included | Not included | Included | Included | Included | Included |
| Flow Adjustment Knob | Included | Not included | Not included | Not included | Not included | Not included | Included | Not included | Not included | Included | Included | Included |
| Fault Indicator Light | Included | Not included | Not included | Included | Not included | Included | Not included | Not included | Included | Included | Included | Included |
| Oil Level Gauge | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Included | Included |
| Air Source and Operating Modes | ||||||||||||
| Air Source Type | Built-in Air Pump | Built-in Air Pump | Built-in Air Pump | Built-in Air Pump | External Air Source | Built-in Air Pump | External Air Source | Built-in Air Pump | Built-in Air Pump | Built-in Air Pump | Dual Built-In Air Pumps | Built-in Air Pump |
| Operating Modes | Smoke Mode | Smoke Mode | Smoke Mode | Smoke Mode | Smoke Mode | Smoke Mode | Smoke Mode | Smoke Mode | Air Mode / Smoke Mode | Air Mode / Smoke Mode | Air Mode / Smoke Mode | Air Mode / Smoke Mode |
| Dual Pressure Mode | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Standard Mode (35 psi) / EVAP Mode (10 psi) |
| Oil Drain Valve | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Not included | Included | Included | Included | Included |
| Size and Weight | ||||||||||||
| Net Weight (Main Unit) | 1.7 kg | 1.5 kg | 1.6 kg | 1.6 kg | 1.6 kg | 1.6 kg | 1.15 kg | 3.5 kg | 3.2 kg | 3.2 kg | 3.5 kg | 4.2 kg |
| Main Unit Dimensions | 145 × 80 × 200 mm | 145 × 80 × 200 mm | 145 × 80 × 200 mm | 180 × 102 × 143 mm | 180 × 100 × 135 mm | 180 × 102 × 143 mm | 180 × 100 × 135 mm | 110 × 135 × 210 mm | 295 × 295 × 207 mm | 295 × 295 × 207 mm | 150 × 150 × 275 mm | 350 × 250 × 300 mm |
Model Guide
Use this overview to identify the smoke leak detector models you want to compare in detail.
AUTOOL SDT203
Built-in air pump · <15 psi rated output pressure · <6 L/min rated output flow · Smoke Mode
AUTOOL SDT50
Built-in air pump · <10 psi rated output pressure · <5 L/min rated output flow · Smoke Mode
AUTOOL SDT60
Built-in air pump · <10 psi rated output pressure · <5 L/min rated output flow · Smoke Mode
AUTOOL SDT100
Built-in air pump · <10 psi rated output pressure · <5 L/min rated output flow · Smoke Mode
AUTOOL SDT101
External air source · 3.2 kPa (0.46 psi) rated output pressure · >10 L/min rated output flow · Smoke Mode
AUTOOL SDT102
Built-in air pump · <10 psi rated output pressure · >6 L/min rated output flow · Smoke Mode
AUTOOL SDT103
External air source · 3.2 kPa (0.46 psi) rated output pressure · >10 L/min rated output flow · Smoke Mode
AUTOOL SDT106
Built-in air pump · <12 psi rated output pressure · <5 L/min rated output flow · Smoke Mode
AUTOOL SDT205
Built-in air pump · <15 psi rated output pressure · <6 L/min rated output flow · Air Mode / Smoke Mode
AUTOOL SDT205S
Built-in air pump · <15 psi rated output pressure · <6 L/min rated output flow · Air Mode / Smoke Mode
AUTOOL SDT206
Two built-in air pumps · <18 psi rated output pressure · <6 L/min rated output flow · Air Mode / Smoke Mode
AUTOOL SDT208
Built-in air pump · <10 psi EVAP / 35 psi Standard rated output pressure · <15 L/min rated output flow · Air Mode / Smoke Mode
What’s in the Box
Package Contents
The package includes the SDT103 main unit and the accessories shown below. Testing oil is not included.
- Main UnitAUTOOL SDT103 smoke leak detector
- Retail BoxSDT103 retail box
- Power Cable12V DC battery clamp cable
- Smoke HoseSmoke output hose
- AdaptersCone adapter, intake airbag adapter, red connector, and short hose
- Oil BottleEmpty oil bottle included; testing oil is not included
- DocumentationAUTOOL SDT103 user manual
Manual, warranty, and setup support
Manual and Downloads
Use the manual below for SDT103 setup, operation, maintenance, and safety guidance.
AUTOOL SDT103 User Manual
Open the PDF manual for SDT103 setup and operation guidance.
Frequently asked questions
Frequently Asked Questions
Does SDT103 Have a Built-In Air Pump?
No. AUTOOL SDT103 does not have a built-in air pump. It must be connected to an external air source or shop air compressor before use.
What Power Supply Does SDT103 Need?
SDT103 requires a 12V DC vehicle battery power supply. SDT103 input power is 12V DC / 5A.
What Testing Oil Should I Use?
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?
Add 10–15 mL testing oil before first use. Do not exceed this range, and do not add more than 15 mL at one time. If too much oil is added, drain excess oil before operating the unit.
When Should I Refill the Oil?
Refill only when the smoke becomes thin. Before adding fresh oil, pour out the remaining oil in the detector and replace the testing oil regularly.
Can SDT103 Test EVAP Systems?
Yes. SDT103 is designed for EVAP low-pressure smoke leak detection. Its output pressure is 3.2 kPa / 0.46 psi to help prevent EVAP lines from being damaged by excessive pressure.
How Do I Control Smoke Flow?
Before use, gently open the airflow regulator valve. The flow meter shows the current airflow, and the regulator lets you adjust smoke flow for different test lines.
How Long Can SDT103 Run Continuously?
Do not run the detector continuously for more than 8 minutes. Allow the unit to rest between tests.
What Happens If SDT103 Gets Too Hot?
If the unit exceeds 75°C, automatic overheat protection turns off the power. Wait until the unit cools before operating it again. The round metal housing can become hot, so avoid direct contact.
What Systems and Vehicles Can SDT103 Test?
SDT103 supports low-pressure leak checks for EVAP, intake, exhaust, vehicle sealing areas, line fittings, and fuel-tank systems. It can also check crankcase leaks, oil seals, intercooler air leaks, throttle leaks, and intake air duct gasket leaks. Smoke can also help trace valves that do not close fully and certain air or water leak paths. Compatible 12V vehicle types include cars, motorcycles, snowmobiles, off-road vehicles, ATVs, light trucks, and speedboats.
Can SDT103 Directly Test High-Pressure A/C System Leaks?
No. SDT103 is a low-pressure smoke leak detector and should not be used as a direct high-pressure automotive A/C pressure tester. Use it only where the applicable vehicle or component service procedure permits low-pressure smoke testing.
Why Does Smoke Start Quickly While the Test Line Takes About 30 Seconds to Fill?
The unit begins producing smoke in about 5 seconds, while the line under test may take about 30 seconds to fill, depending on system volume. Actual fill time depends on line volume, adapter sealing, airflow setting, oil condition, and test setup.
What Accessories Are Included?
Check the product listing or your selected package option for the exact items included. The package includes the SDT103 main unit, retail box, 12V DC battery clamp cable, smoke hose, cone adapter, and intake airbag adapter. It also includes an empty oil bottle, red connector, short hose, and user manual. Testing oil is not included.
How Is SDT103 Different from Other AUTOOL Smoke Leak Detector Models?
SDT103 is an EVAP-focused external-air-source model with visual airflow monitoring. Other AUTOOL models vary by air source, gauges, output pressure and flow, and available Air / Smoke modes. Depending on the model, they may also add dual-pressure control, an oil drain valve, a fault indicator, an oil level gauge, or different accessories. Compare the model chart before ordering.
How Long Is the Warranty?
Main unit: 3-year limited warranty. Standard accessories: 1-year limited warranty. See Warranty Policy for coverage and exclusions. Contact AUTOOL Store for setup, accessories, troubleshooting, and warranty support.
Customer Reviews
Leave A Review
DSixVjkTS ✓ Verified Purchase –
Simple tool that works well at home.
It is perfect for the home mechanic. Simply built using a paint can, an air regulator, connectors and hoses. Does an excellent job of smoking out leaks.
randyspicer ✓ Verified Purchase –
Smoker
Works Magic
sugarwill68 ✓ Verified Purchase –
Quality Product!
All quality constructed materials! Fast shipper!