Automatic DEF tank filling system

A Diesel exhaust fluid (DEF) tank filling system for continually filling a DEF tank comprising:

• a source of DEF fluid;
• a pump connected to said source of DEF fluid;
• a fill hose having a proximal end and a distal end, said proximal end connected to said pump and at least one first sensor mounted adjacent said distal end, said distal end being adapted for insertion into the DEF tank;
• a CPU operatively connected to said at least one first sensor and said pump, said at least one first sensor communicating with said CPU to energize said pump when said at least one first sensor fails to sense fluid when said fill hose is inserted into the DEF tank and said CPU deenergizes said pump when said at least one first sensor senses fluid when inserted into the DEF tank;
• a siphon valve connected to said pump, said siphon valve is operatively connected to said CPU, said CPU controls said siphon valve to empty said fill hose after the tank is full;
• a second sensor mounted to said fill hose, said CPU operatively connected to said second sensor and said pump, said second sensor communicating with said CPU to energize said pump when said fill hose is in the tank, said CPU deenergizes said pump when said second sensor senses the fill hose is not in the tank;
• said second sensor includes a flap pivotally mounted to said fill hose, said second sensor is a reed switch, whereby said flap is adapted to engage the tank and pivot to engage said reed switch, which when engaged senses said fill hose is in the tank and communicates to said CPU that said pump can operate;
• whereby said DEF fluid filling system continually fills the DEF tank through said fill hose.