Receptacle, calibration device and filling apparatus

A filling apparatus comprising a filling device and a calibration device, and said calibration device including a flowmeter;

• a filling nozzle connected to said flowmeter through a pipe, said filling nozzle having a communication input part that receives information from a side to be filled as an optical signal;
• and a receptacle connected to said flowmeter through a pipe, said receptacle having a communication output part that outputs the signal received from said communication input part of said filling nozzle to a filling nozzle side of a filling device that fills gaseous fuel, said communication output part being translatable in a central axis direction of the pipe connected to the receptacle, and an optical signal being emitted from said communication output part toward the central axis of the pipe, wherein connecting said filling nozzle of the calibration device to the receptacle on the side to be filled, and connecting said filling nozzle on a filling device side to the calibration device provides functions of calibrating the filling device while filling it with gaseous fuel, and transmitting the optical signal from the side being filled to said communication input part of said filling nozzle on the filling device side to perform communication filling via a signal transmission means.