FieldKit is built as a modular product. There is the core of the station, which has four bays for sensor packs to individually plug into (by way of their module boards) and the associated circuitry to handle and store the data that they collect. Therefore, you have the ability to mix and match up to four modules on a single station.
We offer pre-configured options (like FieldKit Water or FieldKit Weather), but if your needs diverge from these options, please log a support ticket and our team will be happy to help you design the right FieldKit for your project.