tecSaaS [tec5 Spectrometer as a Sensor] is a modular embedded platform for OEMs, which is the perfect basis for a fast and cost efficient realization of robust, stand-alone sensors for operation in production, machinery and on-site. The data of UV-VIS-NIR spectral sensors is processed directly in real-time by the system and only process relevant results are sent to the process interface. No separate [Windows] PC is needed for normal operation; all the well-known disadvantages such as IT insecurity, instability, downtime, as well as maintenance and update costs are not an issue any more. The modular architecture allows a fast time-to-market of OEM projects from the idea up to a stand-alone serial system without PC, starting even at smaller quantities.