The leak tester uses adjustable sensitivity from 0 to 1000 ppm and responsive semiconductor sensors to detect refrigerant leaks in HVAC systems, automotive units, and industrial cooling equipment. Equipped with flexible probes, alarms, and broad compatibility, this detector enables precise identification of CFCs/HCFCs leaks in confined spaces. Designed for HVAC technicians, automotive engineers, and refrigeration specialists who require diagnostics during maintenance or operations. Ideal for detecting leaks in commercial air conditioning systems, vehicle cooling components, and industrial refrigeration pipelines. Key benefits include adjustable sensitivity for different leak magnitudes, quick response, access to tight or confined spaces via flexible probes, and reliable identification of CFCs/HCFCs across multiple systems. Use scenarios: Onsite HVAC maintenance to locate leaks in commercial air conditioning systems. Automotive service to verify refrigerant leaks in vehicle cooling systems. Industrial refrigeration plant maintenance to inspect pipelines and components for leaks.