Machine condition monitoring leverages IoT sensors and artificial intelligence to track industrial equipment health in real time, enabling organizations to shift from reactive repairs to predictive maintenance strategies. The article details four core sensing techniques - vibration analysis, temperature sensing, magnetic flux monitoring, and ultrasound detection - alongside the supporting technologies (IIoT, AI analytics, cloud databases, and CMMS integrations) that transform raw sensor data into actionable maintenance alerts. By catching equipment faults early, manufacturers can reduce unplanned downtime and associated costs that exceed $100,000 per hour for large enterprises.