Non-invasive flow measurement along with dual Pt1000 temperature sensors provides excellent reading accuracy for the ultrasonic heat meters. Even in low-flow or turbulent conditions, the microprocessor calculates heat energy with an uncertainty of ≤2% (Class 2 according to EN1434), implementing real-time data validation algorithms to detect anomalies and ensure auditability with time-stamped records. This level of precision is crucial for fair billing, energy efficiency audits, district heating system regulatory compliance, and enterprise resource planning.