DUOYI DY521 Digital Manifold Meter Refrigeration HVAC Vacuum Gauge Digital Pressure Temperature Tester Air Conditioning Tools The intelligent electronic refrigerant group instrument is an auxiliary instrument for the installation, testing and maintenance of refrigeration equipment such as air conditioners and cold storage. The instrument has double pressure test, dual temperature test, digital readout, multi-unit switching, multi-mode function and built-in refrigerant database. The instrument uses high-strength engineering plastics and flexible non-slip silicone design, the whole machine is solid and comfortable to hold. Built-in 32-bit digital processing unit and high-accuracy data acquisition unit, high data and stability. Large-size liquid crystal display, LCD backlight support, data display clear and easy to read, convenient light operation. Long-life valve switch, 1/4-inch standard interface design to ensure that the instrument's durability and versatility. Features: MUST HAVE: The intelligent electronic refrigerant group instrument is an auxiliary instrument for the installation, testing and maintenance of refrigeration equipment such as air conditioners, fridge and cold storage. HVAC System Gauge Set has double pressure test, dual temperature test, digital readout, multi-unit switching, multi-mode function and built-in refrigerant database. SUPER CONVENIENT TOOL:The instrument can measure double pressure at the same time, as well as dual temperature measurement, with automatic multi-unit pressure conversion, automatic conversion of temperature Celsius / Fahrenheit, to facilitate different needs. WHAT YOU CAN GET MORE: Built-in 89 kinds of refrigerant pressure-evaporation temperature database, also calculate the subcooling superheat, to facilitate direct reading of operating process data. Also it tests percentage of vacuum measurement, pressure leak measurement, leak time speed record. It is deserved to ha