N2O-50
N2O-R_1400x800
N2O UniAmp
Designed for research applications within:
Wastewater
Environmental Sciences
Biomedical Sciences
Biotechnology
Microbiology

N2O Microsensor

Measure dissolved and gaseous nitrous oxide

With a detection limit of 0.1 µM and tip sizes down to 25 µm, you can apply the N2O microsensor in any research application with the aim of measuring dissolved and gaseous N2O. Read more...

Read More
Technical Data
Ordering Information & Sizes
Customizations
Manuals & Videos
Quick Enquiry
N2O Microsensor

N2O measurement technology

The Unisense nitrous oxide microsensor is a miniaturized Clark-type sensor with an internal reference and a guard cathode. In addition, the sensor is equipped with an oxygen front guard, which prevents oxygen from interfering with the nitrous oxide measurements.

The N2O-R sensor is a more robust version of the normal nitrous oxide sensor with protection cap suited for bulk measurements including wastewater applications.

The sensor is connected to a high sensitivity picoammeter and the cathode is polarized against the internal reference. Driven by the external partial pressure, nitrous oxide from the environment will penetrate through the sensor tip membrane and be reduced at the metal cathode surface. The picoammeter converts the resulting current to a signal. The internal guard cathode is also polarized and scavenges N2O in the electrolyte, thus minimizing zero-current and polarization time.

For special applications, we can customize the N2O microsensor to your needs in relation to the range and response time. Contact us or check the Technical Data.

N2O-R 2_1400x800

Patent information

This product is covered by the following patents:

Patent issued in China: CN 104937405 A

Patent issued in USA: 9921178

Patent issued in Japan: JP6275744B2

Patent issued in European EP Region: EP2939012B1

Patent pending in several other jurisdictions.

...see more
General
Cables & Connectors
Characteristics
Stirring Sensitivity & Response Time
General
Feature Standard Options Extra price for option selection
Feature
Total length
Standard
150-200 mm
Options
70-350 mm
Extra price for option selection
20-50%
Feature
Diameter 20 mm from tip
Standard
<4 mm
Options
<2 mm
Extra price for option selection
20%
Feature
Glass shaft diameter
Standard
8 mm
Feature
Plastic shaft protection diameter*
Standard
11 mm
Options
Can be omitted
Extra price for option selection

*When mounted with in situ mini connectors, the shaft has no protection mounted, but fits directly into the in situ sensor mounts with pressure compensation. In situ sensors have a standard length of 130-160 mm.

Cables & Connectors
Item Standard Options Extra price for option selection
Item
Cable
Standard
Habia
Item
Cable length
Standard
1.5-2 m
Options
0-10 m
Extra price for option selection
Yes, depends on length
Item
Connector
Standard
LEMO
Options
BNC adapter
Extra price for option selection
Yes, order separately
Item
In situ gold pin connector
Standard
No
Options
Yes
Extra price for option selection
10%
Characteristics
Attribute Standard Options Extra price for option selection
Attribute
Guaranteed lifetime
Standard
2 months
Attribute
Expected lifetime
Standard
3-4 months
Attribute
Expected lifetime N2O-R (SR/IR/HR)*
Standard
4-6 months
Attribute
Temperature range
Standard
-10-50°C
Attribute
Temperature range tip
Standard
-10-50°C
Attribute
Temperature coefficient
Standard
2-3 % per °C
Attribute
Range N2O-50/100/500
Standard
Up to 200 µM
Attribute
Range N2O-R-SR
Standard
Up to 50 µM
Options
Up to 28 mM (1 atm pN2O)
Extra price for option selection
20%
Attribute
Range N2O-R-IR
Standard
Up to 300 µM
Attribute
Range N2O-R-HR
Standard
Up to 4 mM
Attribute
Range N2O-R-LR
Standard
Up to 10 µM
Attribute
Range N2O-MR/NP/FT/SL/ST/PEEK
Standard
Up to 50 µM
Attribute
Detection limit N2O-50
Standard
0.3 µM in water
Attribute
Detection limit N2O-100
Standard
0.1 µM in water
Attribute
Detection limit N2O-500
Standard
0.1 µM in water
Attribute
Detection limit N2O-R-SR
Standard
0.1 µM in water
Attribute
Detection limit N2O-R-IR
Standard
0.3 µM in water
Attribute
Detection limit N2O-R-HR
Standard
1 µM in water
Attribute
Detection limit N2O-R-LR
Standard
25 nM in water
Attribute
Detection limit N2O-MR/NP/FT/SL/ST/PEEK
Standard
0.1 µM in water
Attribute
Internal reference
Standard
Yes
Attribute
Internal guard
Standard
Yes
Attribute
Waterproof
Standard
Yes
Attribute
Pressure compensation
Standard
No
Attribute
Spatial resolution
Standard
Equals outside tip diameter
Attribute
Response
Standard
Linear
Attribute
Known interferences
Standard
NO | H2S | CO2: High (millimolar range) conc. of dissolved gaseous CO2 potentially affect base line signal.

*SR = Standard Range | IR = Intermediate Range | HR = High Range

Stirring Sensitivity & Response Time
N2O Stirring Sensitivity Response Time (90%)
N2O
N2O-50
Stirring Sensitivity
<2%
Response Time (90%)
<30 s
N2O
N2O-100
Stirring Sensitivity
<2%
Response Time (90%)
<30 s
N2O
N2O-500
Stirring Sensitivity
<2%
Response Time (90%)
<35 s
N2O
N2O-R (All variants)
Stirring Sensitivity
<2%
Response Time (90%)
<65 s
N2O
N2O-MR/NP/FT/SL/ST/PEEK
Stirring Sensitivity
<2%
Response Time (90%)
<65 s
Ordering information & Sizes
Ordering information & Sizes
Nitrous Oxide Sensor Size and description Options Extra price for option selection
Nitrous Oxide Sensor
N2O-50
Size and description
40-60 µm - glass sensor
Options
N2O-25 (25-35 µm)
Extra price for option selection
10%
Nitrous Oxide Sensor
N2O-100
Size and description
90-110 µm - glass sensor
Nitrous Oxide Sensor
N2O-500
Size and description
400-600 µm - glass sensor
Nitrous Oxide Sensor
N2O-R
Size and description
400-600 µm - with cap - glass sensor
Nitrous Oxide Sensor
N2O-LR
Size and description
400-600 µm - glass sensor - low range
Nitrous Oxide Sensor
N2O-MR
Size and description
400-600 µm - in guide
Nitrous Oxide Sensor
N2O-NP
Size and description
1.6 x 40 mm - needle sensor for piercing
Nitrous Oxide Sensor
N2O-ST-1/4
Size and description
1/4'' steel tube
Nitrous Oxide Sensor
N2O-SL-1/4
Size and description
FT-cell 1/4'' Swagelok Tee
Nitrous Oxide Sensor
N2O-SL-1/8
Size and description
FT-cell 1/8'' Swagelok Tee
Nitrous Oxide Sensor
N2O-PEEK-1/8
Size and description
FT-cell 1/8'' PEEK Tee
Nitrous Oxide Sensor
N2O-PEEK-1/16
Size and description
FT-cell 1/16'' PEEK Tee
Nitrous Oxide Sensor
N2O-FT-GLASS-6
Size and description
Glass FT-cell 6mm outer diameter
Nitrous Oxide Sensor
N2O-FT-GLASS-8
Size and description
Glass FT-cell 8mm outer diameter

Video Guides

thumbnail
Quick Guide N2O Microsensors

We guide you through how the sensors are made, how you can apply them as well as specifications and customizations

thumbnail
N2O Calibration Kit Video

Application Scientist Tage Dalsgaard shows you how to perform a 2-point calibration with one zero N2O and one known N2O concentration

Quick Enquiry

    If you complete the form below, we will send you a quote as soon as possible to give you a quick price indication.

    Which sensor(s) are you interested in?

    Do you have a Unisense amplifier?

    Are you interested in one of our lab systems?

    Are you interested in one of our field systems?

    We will use your e-mail for our newsletter. That's it.
    You can unsubscribe at any time.

    Are you looking for the Unisense Environment N2O Wastewater System?

    Click here to go to www.unisense-environment.com.

    Unisense Environment

    Related publications

    Dynamics of nitric oxide and nitrous oxide emission during full-scale reject water treatment
    Kampschreur, Marlies J. et al. (2008), Water Research, vol. 42, 812-826
    Read more
    The earthworm gut: An ideal habitat for ingested N2O-producing microorganisms
    Horn, Marcus A. et al. (2003), Applied and Environmental Microbiology, vol. 69, 1662-1669
    Read more
    Development of a 2-sludge, 3-stage system for nitrogen and phosphorous removal from nutrient-rich wastewa⁠…
    Zhou, Yan et al. (2008), Water Research, vol. 42, 3207-3217
    Read more
    High nitrous oxide production from thawing permafrost
    Elberling, Bo et al. (2010), Nature Geoscience, vol. 3, 332-335
    Read more
    Intermittent aeration to regulate microbial activities in membrane-aerated biofilm reactors: Energy-effic⁠…
    Ma, Yunjie et al. (2022), Chemical Engineering Journal, vol. 433, 133630
    Read more
    The combined effect of short-term hydrological and N-fertilization manipulation of wetlands on CO2, CH4, ⁠…
    Bonetti, Giuditta et al. (2022), Environmental Pollution, vol. 294, 118637
    Read more