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N2O Sensor Matches 91% of measured Off-gas Emissions

Measure Nitrous Oxide Emissions

Measure and Manage Nitrous Oxide Emissions

Real-time N2O measurements enable you to implement active control strategies
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No more manual zero point calibrations

Klärwerk Flensburg_credit-photo-Andreas Große

Identifying N2O in Flensburg

"The investment costs had initially deterred us somewhat. However, the knowledge and results we gained made up for it. We see the benefits of using the system in the long term."

N2O Monitoring in a Nitrifying Activated Sludge Process

Wastewater Sensor to Measure Nitrous Oxide Emissions

Fast Responding and Reliable N2O Measurements

The key to measuring dissolved N2O at wastewater treatment plants
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Learn from the Experience of Others

Dive into the details with our tech notes and references
Nitrous Oxide Sensor in Wastewater

Step-by-step Instructions

Have a look at our video guides to see how you calibrate or exchange the sensor head

Tech Notes and References

Tech Notes
N2O Sensor
N2O sensor matches 91% of measured off-gas emissions

Case Study: Full-scale comparison of N2O emissions determined by liquid sensors and off-gas measurement

Identifying N2O at the Flensburg wastewater treatment plant

The investment costs had initially deterred us somewhat. However ...

Tech Notes
N2O Monitoring Highlights Potential for GHG Emissions Reduction

Learn about the results from N2O monitoring in the activated sludge tanks at Severn Trent’s Spernal sewage treatment plant

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Tech Notes
Characterizing N2O emissions from WWTPs

A study of three very different WWTPs in Denmark: Bjergmarken (125,000 PE), Holbæk (60,000 PE), and Hvalsø (11,570 PE)

N2O Mechanisms
Tech Notes
National N2O mapping and reduction of N2O-emission through advanced online-control

Based on data from Danish WWTPs through advanced online-control.

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Tech Notes References
N2O Sensor Controls Emissions from Deammonification Processes

Learn how the water utility Aquafin controls emissions from deammonification processes using the the N2O Wastewater Sensor

Tech Notes
Direct Effect of Activated Sludge Concentration on N2O Emission and CO2-equivalents at Full-scale

Significant 3-fold increase in IPCC2019 wastewater N2O emission factor supported by Danish studies.

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Tech Notes References
Positioning of the N2O Wastewater Sensor

A case study from Kralingseveer WWTP in the Netherlands explores the influence of sensor placement.

Operational experience with the N2O Wastewater Controller

WWTP Pforzheim uses an N2O sensor to determine the formation rate of nitrous oxide in the denitrification and the nitrification zone

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Frederikshavn Water Utility

Frederikshavn Water Utility contacted Unisense Environment for assistance in determining the actual N2O derived CO2 footprint

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N2O Monitoring Puts VCS Denmark at the Technological Forefront

VCS Denmark, one of the largest and oldest water and wastewater companies in Denmark, is actively committed to resource optimization

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Tech Notes
N2O Emissions from Danish WWTPs – a two year monitoring project

The available data show that the nitrous oxide emission varies in time and between wastewater treatment plants.

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Tech Notes
Nitrous Oxide Emissions from Trickling Filters

Information regarding N2O emissions from trickling filters is limited, partly caused by the difficulties in capturing off-gases.

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Tech Notes
IPCC Greenhouse Emission Factors

Significant 3-fold increase in IPCC2019 wastewater N2O emission factor supported by Danish studies.

Carbon Dosage Control
Tech Notes
A tool for Carbon Dosage Control

Monitor the N2O concentration in the liquid and use N2O as a control parameter for carbon dosage in the denitrification process.

One minute introduction to the N2O Wastewater System

In this short video, you can learn why nitrous oxide measurements are important and how the N2O Wastewater System works.





Meet us live

Trade Shows
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Zero Emission?
Zero Emission? Beiträge der Abwasserbeseitigung zur Reduzierung der CO2e-Emission
16 - 17 April 2024, Online (in German)
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Wasserbewirtschaftung im (Klima)-Wandel
Wasserbewirtschaftung im (Klima)-Wandel – 170 Jahre Kanalisation in Lüneburg
Thursday 25 April 2024 at 08:00 - 20:00, Lüneburg, Germany
IFAT Munich 2024
13 - 17 May 2024, Munich, Germany
STF Årsmøde
STF Årsmøde
STF Årsmøde
Friday 7 June 2024 at 08:00 - 20:00, Vandcenter Syd, Odense, Denmark
IWA World Water Congress
IWA World Water Congress & Exhibition
11 - 15 August 2024, Toronto, Canada
5 - 9 October 2024, New Orleans, USA
Aqua Nederland
IMD at Aqua Nederland
DONE: Aqua Nederland 2024
19 March 2023 - 21 March 2024, Gorinchem, Netherlands
SWIG Greenhouse Gas
SWIG Event
DONE: Greenhouse Gases? It’s No Laughing Matter!
Wednesday 28 February 2024 at 09:00 - 16:00, Shay Stadium, Halifax, UK
Aquatech Amsterdam
DONE: Aquatech Amsterdam
6 - 9 November 2023, Amsterdam, Netherlands
Webinar in German
DONE: Webinar: Ursachen der N2O Bildung
Friday 29 September 2023 at 10:00 - 12:00, Microsoft Teams
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DONE: Landesverbandstagung Nord 2023
Tuesday 26 September 2023 at 08:30 - 16:45, Neumünster, Germany
DONE: Spildevandstræf 2023
Wednesday 6 September 2023 at 09:30 - 14:30, Tørslev WWTP, Denmark
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DONE: KläranlagenTage | Mess- und Regelungstechnik in abwassertechnischen Anlagen
20 - 21 June 2023, Osnabrück, Germany
N2O ist das grösste Klimaproblem auf der Kläranlage
Webinar in German
DONE: Webinar: N2O is das größte Klimaproblem auf der Kläranlage
Wednesday 22 February 2023 at 10:00 - 12:00, Microsoft Teams
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Zero Emission – Wege zur Klimaneutralität
DONE: Zero Emission – Wege zur Klimaneutralität
Tuesday 25 October 2022 at 08:00 - 20:00, Berlin, Germany
Unisense Environment

Manage Nitrous Oxide Emissions and Reduce Your Climate Footprint