The MasterCool 55900 Intella-Sense II is a compact, professional-grade leak detector. Designed to deliver reliable performance in real world HVAC and automotive environments. Using an advanced heated tin oxide sensor, it detects refrigerant leaks down to 0.15 oz. year with exceptional speed and precision. Designed for R134a, R1234yf, and all common refrigerants.

• Advanced sensor technology - heated tin oxide sensor detects refrigerants with high accuracy
• Peak function - highlights the highest leak detected for multi-leak environments
• Intelligent tip design - reduces false alarms by sensing and adjusting to the environment
• Multi-color led indicators - visual signal strength and diagnostic feedback in real-time
• Flexible probe - 15.5 in. gooseneck probe reaches tight or hidden leak zones with ease
• Intertek certified - complies with J2791 (R134A), J2913 (R1234YF), and en 14624 standards
• Includes accessories - comes in a blow molded case with leak test vial, replacement filters, and 2 in. batteries
• User-friendly interface - volume/mute control, 3 sensitivity levels, and 6 led indicators for signal display (red, yellow or green)
• Sensor life 2000 hours, operating temperature range 0 to 120 response time less than 1 second
• Sensitivity: high 0.15 oz./yr (4 g/yr) medium 0.25 oz./yr (7 g/yr) low 0.50 oz./yr (14 g/yr)
• Detects all refrigerants (CFCS, HCFCS, and HFCS and blends)
• Sensor type heated tin oxide
• US based customer support - reliable service from MasterCool's new jersey headquarters