The LIDoTT® Sensor M is a high‑precision, MCERTS‑certified ultrasonic level sensor engineered specifically for Event Duration Monitoring (EDM) in wastewater networks. As the UK’s first battery‑powered MCERTS‑approved EDM sensor, it delivers millimetric accuracy (±1 mm) and reliable performance across side weirs, tanks, wet wells, and remote CSO locations. With rugged IP68 and ATEX Zone 0 certification, long‑life battery operation, and proven compliance with strict EDM reporting standards, the Sensor M enables utilities to capture accurate spill event data, maintain regulatory confidence, and reduce operational site‑visit costs.