Kicking off 2019, Kirsten and Ebbe from Unisense have installed an SulfiLogger^TM H₂S sensor in the sewers of Aarhus and thereby initiated the pilot project phase of the Horizon 2020 research and development framework.

Installed in a wet well at a pumping station in the outskirts of Tilst near Aarhus, the first sensor is installed at a location previously associated with residential complaints from the characteristic rotten-egg smell of hydrogen sulfide.

The extension pipe shown here prevents fouling along the cables. The sensor with the extension pipe is lowered down into a well.

Root-cause analysis
The sensor, an SulfiLogger^TM S1 1010, is powered by a portable battery box placed on top of the wire grid at the well cover. The portable nature of the SulfiLogger^TM S1 1010 makes it ideal for root cause analysis in rural regions without easy access to power or SCADA connections. Mounted in a free hanging installation, the sensor is attached at the end of a steel extension pipe to prevent fouling along the power cables.

Horizon 2020
The SulfiLogger^TM sensor is supported by the European Commission’s Horizon 2020 research and development framework in which Unisense will demonstrate both the short and long-term potential of the SulfiLogger^TM H₂S sensor. During the pilot project phase, Unisense will install a series of SulfiLogger^TM H₂S sensors at select wastewater sewer networks in Aarhus and Aalborg prior to the full-scale test involving 100 sensors in Aarhus, Aalborg and London, which follows later in 2019 and 2020.