STOX sensor
fx-6 UniAmp
Custom-made
Detection limit: <10 nM
90-110 µm glass sensor

STOX Microsensor

Measure ultra low oxygen concentrations (<10nM)

The STOX microsensor is a specialized oxygen sensor that allows you to measure ultra low oxygen concentrations in the lab or in situ. The sensor has e.g. been used to demonstrate that oxygen concentration in the oxygen minimum zone of Peru contains less than 2 nM oxygen. Read more...

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Technical Data
Ordering Information & Sizes
Manuals & Videos
STOX Microsensor

Oxygen sensor with an added cathode

The STOX microsensor differs from the standard oxygen microsensor by having two sensing cathodes. The primary cathode corresponds to the cathode found in the standard oxygen sensor. The secondary cathode prevents oxygen from entering the sensor when this cathode is polarized.

This setup allows for frequent zero calibration in situ and thus enables the sensor to measure extremely low oxygen concentrations.

Specially designed microsensors

The STOX microsensor is part of a small portfolio of specialized sensors for niche applications or designed to meet hard-to-obtain requirements. This means that the microsensor requires special training, attention and often patience to use. However, when used with all precautions in mind, the sensor can serve your special needs.

The microsensor is custom-made for each sale and not part of our standard sensor portfolio. Therefore, the sensor is not covered by our general warranty.

STOX schematic drawing_1400x800
General
Cables & Connectors
Characteristics
Stirring Sensitivity & Response Time
General
Feature Standard
Feature
Total length
Standard
150-200 mm
Feature
Diameter 20 mm from tip
Standard
<3 mm
Feature
Diameter 50 mm from tip
Standard
8 mm
Feature
Glass shaft diameter
Standard
8 mm
Feature
Plastic shaft protection diameter*
Standard
11 mm

*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
Item
In situ gold pin connector
Standard
No
Options
Yes
Characteristics
Attribute Standard
Attribute
Guaranteed lifetime
Standard
6 months - non-physical damages (internal or external) only
Attribute
Expected lifetime
Standard
>1 year
Attribute
Temperature range tip
Standard
2-50°C
Attribute
Temperature coefficient
Standard
2-3% per °C
Attribute
Range
Standard
0-saturated
Attribute
Linear range
Standard
0-saturated
Attribute
Detection limit
Standard
<10 nM
Attribute
Internal reference
Standard
Yes
Attribute
Internal guard
Standard
Yes
Attribute
Waterproof
Standard
Yes
Attribute
Spatial resolution
Standard
Equals outside tip diameter
Attribute
Signal drift
Standard
Approx. 10 % per month
Stirring Sensitivity & Response Time
Item Stirring sensitivity Response time (90%)
Item
STOX
Stirring sensitivity
<2 %
Response time (90%)
<20 s
Ordering information & Sizes
Ordering information & Sizes
STOX microsensor Size and description
STOX microsensor
STOX
Size and description
90-110 µm - glass sensor
STOX microsensor
STOX-ST-1/4
Size and description
1/4'' steel tube
STOX microsensor
STOX-SL-1/4
Size and description
FT-cell 1/4'' Swagelok Tee
STOX microsensor
STOX-FT-GLASS-6
Size and description
Glass FT-cell 6 mm outer diameter
STOX microsensor
STOX-FT-GLASS-8
Size and description
Glass FT-cell 8 mm outer diameter

Related publications

Kinetics, diffusional limitation and microscale distribution of chemistry and organisms in a CANON reactor
Nielsen, Michael et al. (2005), FEMS Microbiology Ecology, vol. 51, 247-256
Read more
Determination of ultra-low oxygen concentrations in oxygen minimum zones by the STOX sensor
Revsbech, Niels Peter et al. (2009), Limnology and Oceanography: Methods, vol. 7, 371-381
Read more