The Snap-on A/C Leak Detector, No. ACT825, comes with a heated environment-sensing tip that offers highly accurate readings while drastically reducing false alarms. A large color LCD display and a user-friendly interface make this tool easy to read and show the relative magnitude of a detected leak, unit readiness, and sensitivity settings. The detector selects the best sensor setting and quickly detects chlorofluorocarbon gases, avoiding interference and generating reliable readings. With a flexible 15.5" probe and 2,000-hour sensor life, it can detect HFC, CFC, HCFC, and refrigerant blends in three sensitivity ranges. It also exceeds J2791 (R134a) and J2913 (R1234yf) certifications.