Patent ID: 6952931

Claim:
A system for monitoring the amount of refrigerant used in refrigerant systems comprising: a housing; an electronic weight scale carried in the housing for supporting a refrigerant tank containing a supply of refrigerant and generating weight signals corresponding to the amount of refrigerant in said refrigerant tank; a tank valve carried in the housing for connection to said refrigerant tank when placed on said weight scale; a rack of refrigerant rack lines routed from said housing to the refrigerant systems for connecting said tank valve to said refrigerant systems; rack valves carried in said refrigerant rack lines for controlling the flow of refrigerant through said rack lines to a selected refrigerant system; a system controller in communication with said electronic scale for receiving said weight signals from said weight scale; and said controller controlling said rack valves and tank valve to selectively connect the supply of refrigerant in the refrigerating tank with a selected refrigerant system so that the amount of refrigerant delivered to the refrigerant system is recorded by said system controller.