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AUTOOL SDT50 Automotive Smoke Machine with Built-In Air Pump
US$85.00
Key Features
- Built-In Air Pump
- Intake & Exhaust Leak Checks
- Smoke in About 5 Seconds
- Compact 1.5 kg Design
- Built-In Air Pump: Start automotive smoke testing without an external compressor—ideal for DIY, mobile, and basic garage leak checks.
- Intake & Exhaust Leak Checks: Trace smoke from supported low-pressure intake, exhaust, crankcase, fuel-tank, and pipe-fitting leaks.
- Smoke in About 5 Seconds: Get visible smoke quickly so you can start tracing hidden leak points with less waiting.
- Compact 1.5 kg Design: Easy to carry, hang, store, and move between vehicles.
- 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 SDT50 · 12V Built-In Pump Automotive Smoke Leak Detector
Simple Smoke Testing Without Shop Air
AUTOOL SDT50 is a lightweight automotive smoke machine with a built-in air pump. It supports low-pressure leak checks on intake, exhaust, fuel-tank, vehicle-sealing, and line-fitting systems. No separate air supply is required, which keeps setup simple for workshop, mobile, and DIY use.
- 5-Second Smoke Output
- Built-In Air Pump
- Intake / Exhaust / Fuel Tank
- <10 psi Low-Pressure Output
12VVehicle Compatibility
1.5 kgLightweight Main Unit
75°C / -20°COverheat / Min. Operating Temp.
3 YearsMain Unit Warranty
Core leak-detection capabilities
Key Features
SDT50 combines fast smoke output with a built-in air pump for low-pressure leak checks. It supports intake, exhaust, fuel-tank, crankcase, and vehicle-sealing applications in a 1.5 kg portable unit. Temperature protection and 3-year main-unit warranty support are also included.
Smoke Starts in About 5 Seconds
Smoke generation starts in about 5 seconds, helping users locate leaks sooner.
Built-In Air Pump
No external air supply is required. The built-in pump keeps setup simple for testing in different locations.
Intake / Exhaust / Fuel Tank / Crankcase Leak Checks
Supports checks for crankcase, oil seal, intercooler air, throttle valve, intake manifold, exhaust, fuel tank, line fittings, and coolant tank.
Lightweight and Portable
The SDT50 smoke leak detector weighs only 1.5 kg, takes up little storage space, and is easy to carry for mobile diagnostics.
High / Low Temperature Protection
The unit automatically powers off at 75°C and supports operation down to -20°C.
12V Vehicle Compatibility
For 12V vehicle leak checks, SDT50 works as a smoke machine for cars. It also supports motorcycles, trucks, snowmobiles, off-road vehicles, speedboats, and other vehicles using 12V DC power.
Controls & Connections
The filling port, smoke indicator switch, hook port, power socket, and smoke outlet are grouped on the unit for quick identification during setup and leak testing.
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
Use the SDT50 with a 12V DC battery, liquid paraffin or baby oil, and the included smoke hose. Connect the test line securely before turning on the unit.
Step 01
Add Testing Oil
Fill 10–15 mL baby oil or liquid paraffin into the detector before first use. Do not exceed this range.
Step 02
Connect the Test Line
Access the system to be tested and position the detector near the test area. Disconnect the line you want to test, then connect it to the smoke hose.
Step 03
Power On
Connect the detector to a 12V DC battery. Confirm that the smoke hose and test line are connected securely, then turn on the power switch.
Step 04
Locate Leaks
In about 30 seconds, the connected test line will be filled with smoke. Inspect for escaping smoke to locate leaks and use a headlamp if necessary.
Power, testing oil, safe low-pressure use, heat, and operating limits
Safety & Compatibility
SDT50 is designed for visual low-pressure smoke leak checks. It has a built-in air pump but no pressure gauge, flow meter, or flow adjustment, so locate leaks by visible smoke and stay within the service limits for the system you are testing.
12V Power and Built-In Air Pump
Connect SDT50 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, Not Pressure or Flow Readings
SDT50 outputs less than 10 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 rather than trying to measure pressure or airflow with the unit.
Add 10–15 mL of Testing Oil
Use liquid paraffin or baby oil as testing oil. Add 10–15 mL before first use and do not exceed 15 mL at one time.
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 SDT50 continuously for more than 8 minutes. If the internal temperature exceeds 75°C, the unit shuts off automatically. Let it cool before restarting.
Operating Temperature and Hot Surfaces
SDT50 supports operation down to -20°C. The round metal housing can become hot during use, so avoid touching hot surfaces directly.
Check Connections Before Starting Smoke
Before starting smoke, make sure the smoke hose and test line are connected securely. Follow the vehicle or component service procedure, and do not introduce smoke into any system where smoke testing is not permitted.
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 1AUTOOL SDT50 | Model 3AUTOOL SDT60 | Model 4AUTOOL SDT100 | Model 5AUTOOL SDT101 | Model 6AUTOOL SDT102 | Model 7AUTOOL 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 main detector, product box, hose, power clamp cable, filling accessories, hanging hook, and user manual.
- Main UnitAUTOOL SDT50 Smoke Leak Detector
- Power Cable12V battery clamp cable
- Smoke HoseSmoke output hose
- Filling AccessoriesFunnel and filling bottle
- HookHanging hook
- DocumentationUser manual
- Testing OilNot included; use liquid paraffin or baby oil
Manual, warranty, and setup support
Manual and Downloads
Use the manual below for SDT50 setup, operation, maintenance, and safety guidance.
AUTOOL SDT50 User Manual
Open the PDF manual for SDT50 setup, oil filling, power connection, smoke output, and safe-use guidance.
Frequently asked questions
Frequently Asked Questions
Does SDT50 Need an External Air Pump?
No. AUTOOL SDT50 has a built-in air pump, so it does not require a separate air supply or extra air pump for normal smoke leak detection.
What Testing Oil Should I Use?
Liquid paraffin and baby oil are both acceptable testing oils for SDT50. Replace the testing oil regularly, and drain remaining old oil before adding fresh oil.
How Much Oil Should I Add?
Fill 10–15 mL oil before first use. Do not exceed this range. Fresh oil can be added only when smoke becomes thin, and do not add more than 15 mL each time.
What Power Supply Does SDT50 Need?
SDT50 must be connected to a 12V DC battery and is designed for 12V DC vehicle leak checks.
How Long Can SDT50 Run Continuously?
Do not run the detector continuously for more than 8 minutes. Allow the unit to rest between operating cycles.
Why Did the Unit Shut Off Automatically?
If the temperature exceeds 75°C, automatic overheat protection turns off the power. Let the unit cool before restarting.
Is Any Part of the Detector Hot During Operation?
Yes. The round metal housing can become hot during operation. Avoid direct contact to prevent burns.
Should I Avoid Any Parts During Leak Detection?
Yes. Do not introduce smoke into any component or system that the vehicle or component service procedure excludes from smoke testing.
How Does SDT50 Differ from Other AUTOOL Smoke Leak Detectors?
SDT50 is a lightweight built-in-pump model with Smoke Mode, rated output below 10 psi, output flow below 5 L/min, 50 W rated power, and a 1.5 kg main-unit weight. SDT60 adds a pressure gauge. SDT101 and SDT103 are EVAP-focused models that use external air sources. SDT205, SDT205S, SDT206, and SDT208 add separate Air and Smoke modes. SDT208 also provides a 35 psi Standard mode and a 10 psi EVAP mode.
Customer Reviews
Leave A Review
peter G ✓ Verified Purchase –
Excellent Product!
I am extremely satisfied with this product. It exceeded my expectations in every way. The quality is top-notch, and it performs exactly as described. I would highly recommend this to anyone looking for Smoke Detector Machine. Great value for the price!
Seadyasd ✓ Verified Purchase –
Works very well
Arrived ahead of schedule. Everything in good packaging condition.
Good product very useful and recommended, easy to use and good diagnostic results
Jane Copperfield ✓ Verified Purchase –
WELL
This thing works just as well as a larger machine, and I was surprised judging by how tiny it is. Works great for smoking fuel tanks and even for engine vacuum leaks.