LIQUID DISCHARGER

PURPOSE:To eliminate current leak at the part on the liq. feed pipe side and to lighten the part on the liq. feed pipe side and the part on the nozzle side by controlling the operation of the equipment on the pump device side with use of an optical fiber, a light emitting element, and a light receiving element. CONSTITUTION:The optical fibers 5 and 6 are provided between the pump device 1 side and the nozzle 4 side. The light emitting element for emitting an optical signal to the fiber 5 is furnished on the pump device 1 side, and an operating means 8 for transmitting the optical signal transmitted by the fiber 5 to the fiber 6 is provided on the nozzle 4 side. The light receiving element for receiving the optical signal transmitted by the fiber 6 is furnished on the pump device 1 side, and the light receiving element is electrically connected to an operation controlling part 10 for controlling the operation of the operating equipment provided on the device 1 side. As a result, the operation of the operating equipment such as a prime mover for driving the pump device and a solenoid valve provided to the liq. feed pipe can be remote-controlled, and current leak at the part on the liq. feed pipe side can be eliminated.