Fuel or DEF dispenser having fluid temperature conditioning and control system

A fluid dispenser for dispensing liquid fuel or diesel exhaust fluid from at least one fluid storage tank into a vehicle, comprising:

• a housing in which fluid flow control components are located;
• a control system;
• a first fluid conduit completing a first flow path between said at least one fluid storage tank and a nozzle coupled to said housing;
• a second fluid conduit completing a second flow path between said nozzle and said at least one fluid storage tank;
• a bypass valve located along one of said first and second flow paths, said bypass valve being selectively openable to allow fluid communication between said first and second flow paths;
• and
• at least one controllable valve located along said second flow path, said at least one controllable valve in electronic communication with said control system.

A method of measuring the flow rate of a fluid in a fluid dispenser for dispensing liquid fuel or diesel exhaust fluid to a vehicle in a fueling environment, comprising the steps of:

• providing a fluid dispenser comprising a housing and a control system;
• said fluid dispenser defining first and second fluid conduits connectable to first and second fluid flow paths, respectively, between at least one fluid storage tank and a nozzle coupled to said fluid dispenser;
• providing a first controllable valve located along said first flow path and in electronic communication with said control system, said first flow path defining a fluid inlet for an evacuation fluid downstream of said first controllable valve;
• providing a recirculation pump coupled to said second flow path and in electronic communication with said control system;
• closing said first controllable valve and evacuating said fluid from said first and second fluid conduits when said fluid dispenser is not in use.