Product Details: Ensure your semi truck is Ready for the Road Ahead™ with reliable leak detection, with the Mastercool Battery Powered Refrigerant Leak Detector. By utilizing an advanced microprocessor, this replacement device allows operators to scan the equipment of an AC system to check if there are any refrigerant leaks. Engineered with a visual leak level indicator to simply service changes. FleetPride is your First Click in Heavy Duty®.