Geläschus, Anton UlrichAnton UlrichGeläschus2026-07-022026-07-022026-07-02https://hdl.handle.net/11420/56212This TORE dataset contains supporting data, V1 PCB documentation, and V1 firmware material for the first-generation millimeter-scale Lagrangian sensor sphere described in the related MikroSystemTechnik KONGRESS 2025 publication. The data were collected to document and evaluate an early miniaturized Lagrangian sensor platform for position and state monitoring in stirred (bio-)chemical reactor environments, where freely moving sensor particles can provide local information that is difficult to obtain with fixed probes. The dataset is organized into measurement data (01_Data), PCB documentation (02_PCB), and firmware sources plus development configuration (03_Firmware).enhttps://creativecommons.org/licenses/by/4.0/Lagrangian sensorprinted circuit board (PCB)inertial measurement unit (IMU)LED data transmissionreactor monitoringPCB DesignCAD dataTechnology::660: Chemistry; Chemical Engineering::660.2: Chemical EngineeringMeasurement and Test Data10.15480/882.15383Geläschus, Anton UlrichAnton UlrichGeläschusTrieu, Hoc KhiemHoc KhiemTrieuGeläschus, Anton UlrichAnton UlrichGeläschusHaack, MarelMarelHaackSulecki, Julius vonJulius vonSuleckiGeläschus, Anton UlrichAnton UlrichGeläschusTrieu, Hoc KhiemHoc KhiemTrieu10.30420/456614119