Sentinel Motion is an innovative IoT-based sensor system specifically engineered for monitoring critical equipment in rail applications. Originally developed for the aerospace sector, it is tailored for railroads, merging the functions of conventional wayside detection systems into a singular, cost-effective solution. Utilizing a network of RotoSense smart sensors and Sentinel Gateway, this system enables continuous remote monitoring and generates alerts based on anomalies found in temperature or vibration data. Deployed directly onto the axles, it offers rigorous real-time diagnostics that help mitigate costly maintenance operations, addressing bearing and wheel failures effectively. Sentinel Motion's introduction allows the railroad industry to optimize maintenance strategies and significantly cut costs associated with bearing and wheel failures, which are major financial burdens. It enhances safety and reliability in operations while reducing spend on reactive maintenance. This comprehensive platform contributes substantially to condition-based maintenance implementations, promoting proactive management of rail infrastructure health.