A data collection apparatus and unit are provided. The apparatus includes a probe configured to measure one or more operating conditions of a machine, and a tag reader configured to receive a tag identifier transmitted by a tag positioned proximal to the machine. The apparatus also includes one or more processors configured to communicate with the probe and the tag reader, and a memory system including one or more computer-readable media storing instructions that, when executed by the one or more processors, are configured to cause the apparatus to perform operations. The operations include determining that the apparatus is physically proximal to the machine, and reading a tag identifier from the tag of the machine. The operations also include storing a measurement received from the probe, and associating the measurement with the tag identifier.