1. Introduction
The ANCEL S300 is a professional automotive diagnostic tool designed to detect leaks in various vehicle systems, including EVAP, intake, exhaust, crankcase, fuel tank, turbo, and general pipe fittings. Featuring a built-in air pump and advanced 5th generation technology, it offers efficient and safe leak detection for both cars and motorcycles.

Image: ANCEL S300 Smoke Leak Tester and included accessories.
2. Safety Information
- Ensure proper ventilation when operating the device.
- Use only recommended test oil (baby oil) for smoke generation.
- Avoid direct contact with smoke.
- Do not operate the device near open flames or flammable materials.
- The device features Overheat Protection (shuts off if temperature exceeds 75℃) and Anti-frost Protection (operates normally at -20℃).
- Always connect the device to a 12V vehicle battery.

Image: ANCEL S300 highlighting Overheat (248°F) and Anti-frost (-68°F) protection features.
3. Package Contents
The ANCEL S300 package includes the following items:
- ANCEL S300 Smoke Leak Tester Unit
- Power Cord (with alligator clips for 12V battery connection)
- Delivery Hose
- Funnel
- Intake Bladder
- Service Replacement
- Adapter Cone
- EVAP Adapter
- EVAP Removal Tool
- Cap Plugs Kit (various sizes)

Image: A visual representation of the included accessories and adapters.

Image: Additional automotive cap plugs kit for sealing various openings.
4. Product Features and Components
The ANCEL S300 incorporates advanced 5th generation technology for reliable and safe operation. Key components are:

Image: Labeled diagram of the ANCEL S300 unit.
- A - Hook: For hanging the device during use.
- B - Flow Meter: Indicates the rate of air/smoke flow.
- C - Air Mode LED: Illuminates when Air Mode is active.
- D - Flow Dial: Adjusts the air/smoke output level.
- E - Air/Smoke Output: Connection point for the delivery hose.
- F - Oil Filler Port: Where test oil is added.
- G - Pressure Gauge: Displays system pressure, crucial for leak detection.
- H - Mode Selector / OFF: Switch between Air Mode, Smoke Mode, and Off.
- I - Smoke Mode LED: Illuminates when Smoke Mode is active.
- J - Power Socket: Connection point for the power cord.

Image: The ANCEL S300 features a built-in air pump, removing the need for a separate air compressor.
5. Setup Instructions
Follow these steps to prepare your ANCEL S300 for use:
- Fill with Test Oil: Open the oil filler port (F) and use the provided funnel to add 10ml-20ml of test oil (baby oil) into the detector. Do not overfill. Check the oil window to ensure the liquid level is correct.
- Install Power Cord: Connect the power cord to the power socket (J) on the device.
- Install Smoke Hose: Connect the delivery hose to the Air/Smoke Output (E).
- Mount the Device: Use the hook (A) to hang the device securely on the vehicle's front hood or a stable surface.
- Connect to Power: Connect the alligator clips of the power cord to a 12V car battery (red to positive, black to negative).

Image: Visual guide for initial setup and operation.
Video: Demonstrates the setup process, including filling oil, connecting power, and installing the smoke hose.
6. Operating Instructions
The ANCEL S300 offers two operating modes for comprehensive leak detection:
6.1. Air Mode (Initial Leak Check)
- Switch the Mode Selector (H) to the Air Mode (left position, fan icon). The Air Mode LED (C) will illuminate.
- Connect the delivery hose to the system you wish to test (e.g., intake manifold, exhaust pipe).
- Observe the Pressure Gauge (G) and Flow Meter (B).
- No Leak: If the pressure gauge value remains unchanged and the flow meter reads zero (ball at bottom), there is no leakage.
- Small Leak: If the pressure gauge value drops and the flow meter ball slowly falls to the bottom, a small leak is present.
- Massive Leak: If the pressure gauge value drops to zero and the flow meter ball never falls to the bottom, a large leak is present.
- This mode helps determine if a leak exists before using smoke, saving test oil.
6.2. Smoke Mode (Pinpointing Leaks)
- After confirming a leak with Air Mode, switch the Mode Selector (H) to the Smoke Mode (right position, cloud icon). The Smoke Mode LED (I) will illuminate.
- The device will begin generating smoke within 10 seconds.
- Use the Flow Dial (D) to adjust the smoke output volume as needed to pinpoint the leak.
- Direct the smoke into the suspected area of the vehicle system. Observe where smoke escapes to identify the exact leak location.

Image: Air Mode (left) for detecting leaks and Smoke Mode (right) for pinpointing their location.

Image: Interpreting leak status using the pressure gauge and flow meter.

Image: The Flow Dial allows for adjustable smoke output to precisely locate leaks.
7. Applications
The ANCEL S300 is versatile and can be used to diagnose leaks in various systems for both cars and motorcycles:
- EVAP System
- Intake System
- Exhaust System
- Crankcase System
- Car Sealing (e.g., vehicle cabin air leaks)
- Fuel Tank System
- Turbo System
- Various Pipe Fittings

Image: Various vehicle systems that can be tested for leaks.
7.1. Detecting Vehicle Cabin Air Leaks
- Close all doors and windows of the vehicle.
- Start the car and turn on the blower.
- Run smoke around all seams and windows outside the car to identify air leaks into the cabin.

Image: Instructions for detecting air leaks in the vehicle cabin.
8. Maintenance
To ensure the longevity and optimal performance of your ANCEL S300, follow these general maintenance guidelines:
- Regularly check the test oil level and refill as needed.
- Use only clean, recommended test oil (baby oil) to prevent clogging or damage.
- After each use, ensure the device is clean and free from any residue.
- Store the device in a cool, dry place away from direct sunlight and extreme temperatures.
- Avoid dropping or subjecting the device to strong impacts.
The ANCEL S300 utilizes a 5th generation technology with isolated heat conduction, designed for durability and safety, reducing the risk of internal component burnout common in older models.

Image: Advantages of the 5th generation technology used in ANCEL S300.
9. Troubleshooting
If you encounter issues with your ANCEL S300, refer to the following common problems and solutions:
- Problem: The pump functions, but no smoke is generated, and the red button (Smoke Mode LED) is flashing.
- Possible Cause: Insufficient test oil or incorrect oil type.
- Solution: Ensure the test oil level is between 10ml-20ml and that you are using appropriate test oil (e.g., baby oil). If the oil level is too low, the heating element may not be able to produce smoke effectively, and the flashing red light could indicate a safety or operational alert related to this.
10. Specifications
| Attribute | Value |
|---|---|
| Brand Name | ANCEL |
| Model | S300 |
| Power Source | DC 12V (Fully Charged Vehicle Battery) |
| Current | 6A |
| Flow Rate | <6 L/min (max) |
| Output Pressure | 0.8-1.0 bar (0.8-14.5 psi) |
| Fast Smoke Out | Within 10 Seconds |
| Weight | 3.05 LB |
| Warranty | 3 Year |
| Support Vehicle Types | Motorcycle, Passenger Vehicle, etc. |

Image: Detailed product parameters for the ANCEL S300.
11. User Tips
- Always ensure the test oil is filled to the correct level before starting a smoke test to prevent operational issues.
- When performing a leak test, start with the Air Mode to quickly assess if a leak is present. This can save test oil if no leak is detected.
- For precise leak location, utilize the Smoke Mode and adjust the smoke output using the flow dial.
- Remember to disconnect the power cord from the battery after use.
12. Warranty and Support
The ANCEL S300 comes with a 3-year warranty, ensuring peace of mind for your purchase. For technical support, service, or warranty claims, please contact ANCEL customer service through their official channels.





