All in One, Meet Your Needs! It's a strong tool for spotting issues with leaks in automotive systems. Comparing SD201, it more faster, more precise, and SMART. Dual test modes for faster, more accurate diagnosis to save time with air Mode to quickly locate large leaks, then switch to Smoke Mode for precise detection of small EVAP, intake, or vacuum leaks. Unlike basic smoke machines with one mode, ST203 adapts to both quick inspections. Built-in Air Pump ST203 comes with a built-in air pump that produces smoke in just 10 seconds—no bulky external compressor required. At only 5.5 lbs and featuring one-button operation, it’s ideal for DIYers and pros alike—at home, on the road, or in the shop. Optional Dual Mode, Adjustable Smoke Output. You can set the Air/Smoke mode by pressing the mode switch key before or during operation. Green: air mode. It can help you confirm if there are any leaks. Red: smoke mode. It can help you find out where the leak point is.   Detect Leakage Issues in All Pipeline Systems The ST203 EVAP leak detector features a built-in pressure gauge and dynamic flow meter, through which the extent of the leak can be seen in real time, ensuring that even the smallest leaks can be detected clearly and accurately. Additionally, the smoke output can be easily adjusted by turning the knob, adapting to the nuances of varied test conditions with unparalleled precision. Ensuring your cabin is properly sealed is key for both comfort and air quality. Detect Leakage Issues in All Pipeline Systems It is engineered to diagnose leaks in virtually all major automotive pipeline systems, including: EVAP system, intake system, engine system, turbo system, fuel tank system, crankcase system, exhaust system, EGR system, and even for car sealing tests. Comprehensive coverage ensures no hidden leaks go undetected. Where can You Use? With just a few minutes, the ST203 can help you quickly detect these hidden leaks. Early detection is key to preventing serious problems down the road. How do We Detect Cabin Air Leaks？ Start by checking the seals around your windows, doors, and sunroof. Also, inspect the gas intakes and HVAC system to ensure everything is properly sealed. This ensures a more comfortable ride and fresher air inside your vehicle.