Sealing fluid container assembly (3), connectable to a compressor assembly and to a control circuit of the compressor assembly, has a connecting unit (25) defining a releasable connection to the compressor assembly; and a connecting device (12) for injecting sealing fluid into an inflatable article, and which cooperates releasably with a valve (V) of the inflatable article. More specifically, the container assembly (3) has a sensor carried by the connecting device (12); and at least one electric contact (33) connected to the sensor (12) and cooperating with an electric terminal (24) to transmit a signal from the sensor (12) to the control device when the connecting device (12) is connected to the valve (V); the sensor (12) having a first and a second terminal (40, 39) designed to be short-circuited directly by the valve (V).