Molegraph: DIY Sensors for School Experiments and Their Comparison with Commercial Options

In this article, we compare low-cost DIY (Do It Yourself) sensors and their modules with the sensors of the commercial school-based probeware system PASCO. The DIY sensors were developed as part of the open-source probeware project MoleGraph. The comparison shows that although both solutions are functionally comparable, the DIY sensors offer several key advantages. The low cost of DIY sensors enables the acquisition of a wider range of sensor types for school. The detailed technical documentation available with DIY sensors provides deeper insight into measurement issues and facilitates the development of technical skills through working with datasheets, thereby naturally supporting both technical and language competencies (as the datasheets are primarily in English). Moreover, the DIY approach allows for the integration of experiments with fields such as electronics, microcontrollers, A/D (Analog/Digital) converters, and manual skills (e.g., soldering), representing an attractive extension of traditional education. The implementation of DIY sensors can significantly contribute to interdisciplinary development and a deeper understanding of the principles underlying measurement systems and sensors in modern STEM (Science, Technology, Engineering and Mathematics) education.