--- product_id: 14520212 title: "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" brand: "mastercool" price: "€ 356.23" currency: EUR in_stock: true category: "Mastercool" url: https://www.desertcart.gr/products/14520212-55900-intellasense-ii-refrigerant-leak-detector-heated-tin-oxide-sensor store_origin: GR region: Greece --- # Certified for R134a & R1234yf refrigerants 15.5" flexible probe reaches tight spots Heated Tin Oxide Sensor for ultra-fast detection 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 **Brand:** mastercool **Price:** € 356.23 **Availability:** ✅ In Stock ## Summary > 🚨 Detect leaks before they detect you – Mastercool Intellasense II means no leak gets left behind! ## Quick Answers - **What is this?** 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 by mastercool - **How much does it cost?** € 356.23 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/14520212-55900-intellasense-ii-refrigerant-leak-detector-heated-tin-oxide-sensor) ## Best For - mastercool enthusiasts ## Why This Product - Trusted mastercool brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Flex Your Reach:** 15.5-inch intelligent flexible probe navigates tight, hidden leak zones effortlessly. - • **Stay In The Know:** Multi-color LED display and peak hold function keep you ahead of every leak, even in complex environments. - • **Smart Sensor Tech:** Heated tin oxide sensor with environment-sensing tip minimizes false alarms and maximizes accuracy. - • **Certified Confidence:** Meets SAE J2791, J2913, and EN 14624 standards for trusted professional-grade performance. - • **Pinpoint Precision, Every Time:** Detect leaks as small as 0.15 oz/year with lightning-fast response under 1 second. ## Overview The Mastercool 55900 Intellasense II is a compact, professional refrigerant leak detector featuring a heated tin oxide sensor for ultra-sensitive detection down to 0.15 oz/year. Certified for R134a and R1234yf refrigerants, it boasts a 15.5" flexible probe with an intelligent tip to reduce false alarms, a multi-level LED display for real-time diagnostics, and a peak hold function to lock in the highest leak signal. Designed for HVAC and automotive pros, it combines precision, speed, and certified reliability in a rugged, user-friendly package. ## Description 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 ## Features - ✔️ 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 ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00RVZ6WXQ | | Best Sellers Rank | #151,008 in Automotive ( See Top 100 in Automotive ) #79 in Fuel Leak Detectors #2,214 in Diagnostic, Test & Measurement Tools | | Brand | Mastercool | | Brand Name | Mastercool | | Customer Reviews | 3.8 out of 5 stars 54 Reviews | | Global Trade Identification Number | 00700376559002 | | Included Components | leak detector, molded case, 2C batteries, test vial replacement filters | | Item Dimensions | 10.4 x 2.4 x 15.5 inches | | Item Type Name | Refrigerant leak detector | | Item Weight | 16 ounces | | Item dimensions L x W x H | 10.4 x 2.4 x 15.5 inches | | Manufacturer | Mastercool | | Model | 55900 | | Number of Items | 1 | | Part Number | 55900 | | Style | Intellasense II – Heated Tin Oxide Sensor | | Style Name | Intellasense II – Heated Tin Oxide Sensor | | UPC | 700376559002 | | Unit Count | 1.0 Count | | Warranty Description | 1 year | ## Product Details - **Brand:** Mastercool - **Style:** Intellasense II – Heated Tin Oxide Sensor - **Power Source:** Battery Powered - **Color:** Blue - **Product Dimensions:** 30"D x 8"W x 6"H - **Item Weight:** 1 Pounds - **Alarm:** Vibration - **Global Trade Identification Number:** 00700376559002 - **Number of Items:** 1 - **Manufacturer:** Mastercool ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/51LbVxWwkeL.jpg) ## Available Options This product comes in different **Style** options. ## Frequently Bought Together - Mastercool Refrigerant Leak Detector with Metal Oxide Gas Sensor, IntellaSense II, 55900, Blue - Mastercool 53123-YF Refillable R1234yf Oil/Dye Injector --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/14520212-55900-intellasense-ii-refrigerant-leak-detector-heated-tin-oxide-sensor](https://www.desertcart.gr/products/14520212-55900-intellasense-ii-refrigerant-leak-detector-heated-tin-oxide-sensor) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-07-18*