Abstract: A digital manifold gauge having a gauge assembly with a display, one or more selectors, and a circuit board wherein the gauge assembly is rotatably disposed within a gauge housing and adapted to rotate to provide a plurality of viewing positions for the user. The circuit board is in electrical communication with a sensor port and the sensor port is adapted to receive a sensor transducer, such as a pressure transducer. The gauge includes internal software and logic for data processing and manipulation. The gauge includes a software algorithm adapted to convert pressure data transmitted to the circuit board from the pressure transducer into temperature data. The temperature and pressure data can be displayed on the display in real time and the gauge can also provide graphing and charting of the pressure-temperature relationship. The gauge is compatible with a variety of refrigerants and other fluids flowing through HVAC systems.

Abstract: A convertible refrigerant recovery, recycle, and recharge unit, comprising a control valve array, a vacuum pump, an oil separator, an oil-less compressor, and one or more storage tanks. The vacuum pump and the oil separator are in flow communication with the control valve array, the oil-less compressor is in flow communication with the oil separator, and the storage tanks are in flow communication with said oil-less compressor. The control valve array receives refrigerant from a refrigerant containing device wherein the oil-less compressor draws the refrigerant into said the storage tanks. The unit is compatible with a plurality of refrigerant types without cross-contamination of the refrigerant due to the oil-less compressor and conversion cycle whereby the vacuum pump is activated to remove residual refrigerant from the unit. A refrigerant identifier sensor is in flow communication with the system and can detect contaminants and selectively open and close the storage tanks.

Abstract: A convertible refrigerant recovery, recycle, and recharge unit, comprising a control valve array, a vacuum pump, an oil separator, an oil-less compressor, and one or more storage tanks. The vacuum pump and the oil separator are in flow communication with the control valve array, the oil-less compressor is in flow communication with the oil separator, and the storage tanks are in flow communication with said oil-less compressor. The control valve array receives refrigerant from a refrigerant containing device wherein the oil-less compressor draws the refrigerant into said the storage tanks. The unit is compatible with a plurality of refrigerant types without cross-contamination of the refrigerant due to the oil-less compressor and conversion cycle whereby the vacuum pump is activated to remove residual refrigerant from the unit. A refrigerant identifier sensor is in flow communication with the system and can detect contaminants and selectively open and close the storage tanks.