A method of sensing superheat includes the steps of: (a) connecting a fluid inlet member of a superheat sensor to one of a plurality of fluid systems; (b) allowing fluid to flow from the fluid system to which the superheat sensor is connected to the superheat sensor; (c) sensing a temperature of the fluid in the fluid system with one of an internal temperature sensor mounted within a housing of the superheat sensor and an external temperature sensor mounted outside of the housing of the superheat sensor; and (d) calculating a superheat of the fluid in the fluid system.