Mastercool 55900 Intellasense II Refrigerant Leak Detector – Heated Tin Oxide Sensor, Super Sensitive Mode, Certified for R134a and R1234yf, Compact Design with LED Display and Leak Vial

.Overview
The Mastercool 55900 Intellasense 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, this tool is fully certified to SAE J2791, J2913, and EN 14624 standards.

Key Features
?? 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" gooseneck reaches tight or hidden leak zones with ease
?? INTERTEK CERTIFIED – Complies with J2791 (R134a), J2913 (R1234yf), and EN 14624 standards

Why Mastercool
With over 35 years of innovation in A/C service equipment, Mastercool builds tools trusted by technicians worldwide. The 55900 combines accuracy, durability, and ease of use—offering dependable performance for serious leak detection needs.

Technical Specifications
- Sensor Type: Heated tin oxide
- Sensor Life: 2000 hours
- Sensitivity: High (0.15 oz/yr), Medium (0.25 oz/yr), Low (0.50 oz/yr)
- Response Time: Less than 1 second
- Probe: 15.5" flexible probe with intelligent tip
- Display: 6-level LED indicator with diagnostics
- Battery: 2 "C" alkaline batteries
- Battery Life: 30 hours
- Certifications: SAE J2791, J2913, EN 14624
- Includes: Detector, leak test vial, filters, 2 “C” batteries, blow molded case
.?? HEATED TIN OXIDE SENSOR – Detects all refrigerants (CFCs, HCFCs, HFCs, and blends) with high sensitivity and fast response time
.?? CERTIFIED PERFORMANCE – Complies with SAE J2791 (R134a), J2913 (R1234yf), and EN 14624 standards
.?? SUPER SENSITIVE MODE – Enables enhanced detection of small leaks, including R1234yf and R407C
.?? INTELLIGENT PROBE DESIGN – 15.5” flexible probe with environment-sensing tip minimizes false alarms
.?? PEAK HOLD FUNCTION – Locks the highest leak signal while continuing to scan for additional leaks
.?? USER-FRIENDLY INTERFACE – Volume/mute control, three sensitivity levels, and LED indicators for signal strength, sensor status, and diagnostics
.?? INCLUDES ACCESSORIES – Comes in a blow molded case with leak test vial, replacement filters, and 2 “C” batteries
.?? U.S. BASED CUSTOMER SUPPORT – Reliable service from Mastercool’s New Jersey headquarters