Wireless ultrasonic sensor with LoRaWAN interface, especially for fill level measurement in tanks and silos up to 10m level, sensing range 500 ... 7000 mm, resolution 1 mm. Battery operated. battery lifetime approx. 10 years. Data transfer via LoRaWAN. LoRaWAN downlink channel for querying and adjusting parameter values. Bluetooth interface for commissioning, parameterization and diagnostics.