Mastercool 55850 Intellasense Refrigerant Leak Detector Kit High Sensitivity detects all refrigerants (CFC’s, HCFC’s, & HFC’s) with its new metal oxide gas sensor and fast response time. The Mastercool 55850 features a 2,000-hour sensor life, 16” flexible probe, detailed colored LCD display, and high/medium/low sensitivities.**Includes: Blow molded carrying case, 55850 refrigerant leak detector, 53512 12 LED UV Light, 92398 UV Safety glasses, (2) D batteries, leak test vial, and replacement filters**