PRODUCT OVERVIEW Fresenius Off-Gas-System More Info — Gas Dome 300 + GA320 The expert solution for monitoring off-gas of WWTP

HIGH-PERFORMANCE Off-Gas MONITORING Off-Gas SYSTEM EXPERT Maximum measurement performance. Minimum detection limits. For applications in which even very low N2O and CH4 concentrations must be reliably captured and quantified with high precision. Continuous measurement of nitrous oxide and methane emissions from the aeration tanks of wastewater treatment plants measurement uncertainty with humidity and cross-sensitivity compensation For the highest demands on detection limit, accuracy and measurement stability. System schematic A floating hood with a footprint of exactly 1.00 m² captures the rising...

Why the Off-Gas System Measured instead of estimated A defined reference area The EU Urban Wastewater Treatment Directive requires accounting for methane and nitrous oxide — transposition by July 2027. A measured emission rate is more defensible than any estimation factor. The hood encloses exactly 1.00 m² and the immersed skirt seals it. No dilution by ambient air — unlike extraction at the tank edge. A key figure that works mg/(m²·h) scales to the whole tank, is comparable between plants and shows immediately whether an operational change really reduces emissions. Self-referencing NDIR with...

Technical data The Off-Gas System Expert is the line for precision measurement and low emission values: research-grade measurement campaigns, plants with already optimised nitrogen removal, and every task in which small differences in the emission rate must be demonstrated with confidence. The GA320 achieves a detection limit of 0.5 ppmV for N2O, 0.1 ppmV resolution and ≤ 2 % measurement uncertainty — with humidity compensation, cross-sensitivity compensation and up to six sample gas inlets. Analyser GA320 Measured components and ranges Detection limit Expanded measurement uncertainty Measuring...

Completely assembled, wired and factory-tested - ready for connection to power and control system The floating hood Gas Dome 300 - capture at the tank • Collection area exactly 1.00 m2, immersed skirt with chain ballast • Off-gas hose ID 40 mm, 25 m per measuring point • Guy ropes with turnbuckles and boom for strain relief The analyser system Outdoor cabinet with complete periphery • Rain canopy and plinth - weatherproof outdoor installation • Analyser weather-protected inside the cabinet, heated and ventilated • Condensate trap with level monitor and sample gas filter per point • Thermal flow...

You receive a completely assembled, wired and tested system — ready for connection to power and control system. All components are industry standard and individually available as spare parts. Gas path per measuring point Condensate trap 300 mm overall height, straight through, with level monitor 1 2 — no drain valve required Sample gas filter In the partial flow directly upstream of the analyser 1 2 Flow measurement with Thermal flow transmitter in the vertically flown metering tube 1 2 DN 50 metering tube widened to DN 50, 0-3 m/s 0-21 m3/h, output 0-10 V or Fresenius Umwelttechnik GmbH - OffGas...

Measuring technology and evaluation Analyser GA320 19” rack unit 3 U in the swing frame, N2O / CH4 / CO2, N2O 1 1 detection limit 0.5 ppmV, measurement uncertainty < 2 %, humidity and cross-sensitivity compensation, 7” touch display Emission rate calculation In the analyser firmware: E = c x q / a in mg/(m2-h), standard 1 1 reference conditions throughout, minimum flow criterion 1 m3/h Assembly and testing Cabinet assembly, wiring, leak and function test at incl. incl. Assembly and testing Off-gas flow rate Complete system 1. One system serves up to two floating hoods; hose length 25 m per line....