The Contract covers the purchase, delivery, installation, commissioning and site acceptance testing of a complete measurement system (the System) for measuring the volume concentration of nitrous oxide (N2O), methane (CH4), carbon dioxide (CO2) and oxygen (O2) in off-gas from the eight (8) zones at Öresundsverket wastewater treatment plant. The System includes gas collection from the measurement points, transfer of gas to the analyser or analysers, multi-gas analysis, associated equipment, software, documentation and all other components necessary for a complete and operational system in accordance with the Contract. The Supplier may propose the technical design of the System, including the number and placement of analyser(s), provided that all mandatory requirements, including the required measurement frequency for each zone, are fulfilled. The Contract also includes the provision of spare parts, consumables, associated equipment, software licences and software updates for the delivered System.