A recorder includes a wireless gateway unit built in the recorder, the wireless gateway unit being configured to wirelessly communicate with a field device, the wireless gateway unit converting between an internal communication protocol used for the internal communication of the recorder and a protocol used for the wireless communication. The recorder may further include a control unit that processes data from the field device. The wireless gateway unit is configured to internally communicate with the control unit. The wireless gateway unit collects the data from the field device to transmit to the control unit.