Inficon D-TEK CO2 HVAC Refrigerant Leak Detector is designed to detect next generation refrigerants in addition to carbon dioxide. The Inficon D-TEK features an advanced infrared absorption cell that is highly sensitive to CO2, 800 hour infrared cell lifespan, charging status indication, low battery indication, infrared cell failure indication, long-lasting NiMH power stick with fantastic charging capacity, and more.