MasterCool 55975 Intella-Sense III Combustible Gas Leak Detector is engineered for HVAC and industrial technicians who need precise, fast detection of combustible gases indemanding environments. It utilizes a heated tin oxide sensor known for its excellent sensitivity and rapid response time. Paired with a smart microprocessor that continuously calibrates for optimal performance.

• Advanced sensor technology - heated tin oxide sensing element provides fast, accurate detection of combustible gases with 1 second response time
• Combustible gas detection - detects methane, propane, acetone, ammonia, gasoline, hydrogen, butane, and more
• 15.5 in. flexible probe - reaches difficult areas with intelligent tip that senses environmental conditions to reduce false alarms
• 6-led display interface - clear led indicators show leak signal strength, sensitivity level, and diagnostics like low battery or sensor faults
• Intelligent microprocessor - auto-selects optimal sensor conditions for consistent performance and extended sensor life
• Multi-function keypad - easily control on/off, volume, sensitivity (high/medium/low), and peak hold for complex leak environments
• Complete kit included - comes with blow-molded case, 2 in. batteries, leak test vial, and replacement filters
• Quick response time 1 second with a 2000-hour sensor life
• Sensitivity 50-1000 ppm, sensor life 2000 hours
• Durable design to efficiently work in temperatures ranging between 0 to 120 °f
• US based support - backed by master cool reliable service and support team

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