The RD-200 Refrigerant Leak Detector is a professional-grade tool engineered for detecting refrigerant leaks in HVAC, refrigeration, and automotive systems. It identifies a broad range of refrigerants including HFCs (R134a, R404A, R407C, R410A), CFCs (R11, R502), and HCFCs (R22) using a heated diode sensor. The unit features adjustable sensitivity with high/low detection levels as low as 0.1oz/year (3g/year) for R22 and R134a, ensuring precise leak pinpointing. Alerts include a 5-LED visual indicator and audible alarm, supported by a flexible 18" gooseneck probe for accessing tight spaces. It offers a less than 3 second response time, less than 10 second recovery, and 50-second warm-up. Additional features include fresh air calibration reset, auto power-off, and a low battery indicator. Compact and lightweight at 8.7 x 2.4 x 1.6" and 16.9oz, it runs on 4 AAA batteries (included) and comes with a protective pouch. Ideal for HVAC techs, automotive professionals, facility maintenance, and refrigeration engineers, the RD-200 is perfect for ensuring system integrity and regulatory compliance.