The EM4xxx datalogger system is fully IP68 rated. It consists of 4 main elements.
- Loop antennas. These are available currently in 3 diameters (45mm, 65mm and 80mm). All antennas come with 1.5m of cable. Antennas can be single or double, depending upon the RFID unit ordered being single or double.
- RFID Unit. This unit is a double antenna version. It is IP68 rated and comes with two connectors. One to the antenna(s) and one to the datalogger/battery unit. The unit contains a small amount of memory where 100 detections are stored. Once more than 100 detections occur, the data is transferred to the datalogger/battery unit where it is stored as a CSV file.
- The datalogger/battery unit. This contains the storage memory for the tag detections and a rechargeable lithium ion battery pack. This is charged by a 5V power supply (USB) and is connected by a mini USB connector. On the current pre-production trial units, the system is a fixed polling rate of 7 scans per second. Any tag detected will not be stored in memory again for a second to prevent too many “same event” storages. On future releases, polling time will be user configurable, as will the “same event” delay time for ignoring events within a user selectable time of one another.
- Interconnect cable for connecting Datalogger/Battery Unit to RFID Unit.