| 摘要 |
PROBLEM TO BE SOLVED: To lighten selling agent's supervising burden and reduce cost requiring for communications between a consumer side and a selling agent in relation to a system for automatically placing and accepting orders for fluid commodities such as kerosene, light oil, gasoline and LP gas. SOLUTION: A system for automatically placing and accepting orders for fluid commodities comprises a fluid tank 3 set on a consumer side 1, a detecting means capable of detecting that whether a residual amount in the fluid tank 3 is either in a first state of more than a preset level or in a second state of lower than a preset level, and a state identification means for judging the finish of a state shift from the first state to the second state on the basis of an output signal from the detecting means. By identifying the finish of the state shift to the second state with the aid of the state identification means, information specifying the consumer side 1 is automatically transmitted from the consumer side 1 to a selling agent 2 through a transmitting means 7. |
