Totaltest tube chemical crystals react with acid or moisture when it is present in the system, changing color for an easy visual check|It's quick - All it takes is a maximum of ten minutes to test CFC, HCFC, or HFC systems for acid or moisture|It'll help you figure out why the system failed and isolate a future problem before it happens|It's reliable - Totaltest is designed to reliably tell whether acid or moisture is present and tells you when corrective action needs to be done|Carrier engineered and Carrier qualified|It's Convenient - Simply connect to the unit's suction side service fitting and follow the easy instructions|No need to take oil samples and the test is performed without shutting down the system|Plus, with an "all-in-one" kit, you always know you have the right tools to diagnose contamination - no matter what refrigerant your servicing|It's affordable - Competitively priced on a per-use basis|Once you purchased the starting kit, you only need to purchase refills for all your testing needs|Tests - Acid test for R-11, R-12, R-500, R-502, R-22, R407C, R410A, R134A moisture test for R-11, R-12, R-500, R-502, R-22, the "Yellow Tube" tests for moisture in R410A