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Battery Powered 4G Lora Radar Ultrasonic Flow Velocity Liquid Water Level Monitoring for Sewer Drainage. Battery Powered & IP68: Ultra-low power consumption with IP68 waterproof rating for harsh environments. Dual Measurement Modes: Automatically switches between radar and ultrasonic Doppler for full/non-full pipes. Remote Cloud Monitoring: Real-time data and alerts via 4G wireless communication to cloud platform. Anti-Interference Design: Reduces impact of sediment and debris, lowering maintenance frequency.