Smart sensor and RTU 2-in-1 LoRaWAN terminal from the Polysense iEdge 4.0 line. UV254 COD sensor for wastewater and surface water, IP68. It measures chemical oxygen demand by UV254 absorption and reports the readings over a LoRaWAN network. The OD outputs can switch external devices such as relays, beepers or fans when a reading or a remote command triggers them.
Specifications as published by Polysense.