Opto-430
Opto-MR
Eeprom
Opto-3000
Temp-UniAmp
Designed for research applications within:
Respiration
Biomedical Sciences
Bulk and Bioreactors
Environmental sciences

O2 MicroOptode

Optode sensor technology

Unisense offers optode sensor technology with full integration to our existing laboratory systems. The optical sensor technology gives you a cost-effective and robust oxygen sensor that enables a great number of applications. Read more...

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Technical Data
Ordering Information & Sizes
Manuals & Videos
O2 MicroOptode

Full integration to lab systems

Simple two-point calibration and temperature compensation ensures ease-of-use, and the Unisense software suite allows you to combine the oxygen MicroOptode with our wide selection of microsensors. You can use the MicroOptodes with our 1 or 4 channel Opto UniAmp, the Field Opto UniAmp, the fx-3 or the fx-6 UniAmp Multi Channel.

The Unisense oxygen optodes are designed for research applications such as:

  • Respiration
  • Biomedicine
  • Bulk and bioreactors
  • Environmental sciences
  • Profiling
Opto-F1 w. sensor

Oxygen MicroOptode principle

The measuring principle of the oxygen optode is based on Unisense technology and delivers unparalleled performance within our core application segments . Luminescence quenching caused by collision with oxygen molecules makes it possible to determine the oxygen concentration. More oxygen molecules will result in a lower emission signal, providing a measurement of the oxygen concentration in the sample.

The optode fiber is built into a steel needle. This allows you to retract the fiber into the needle for complete protection, e.g. when piercing a rubber septum. When the needle tip reaches the measuring site, the fiber can be pushed out into the sample and measure the oxygen concentration.

Customized versions with fixed exposure for e.g. profiling application and Eddy Covariance are also available.

Combined with our Opto UniAmp, fx-3 and fx-6 UniAmp, the optical sensor technology gives you following advantages:

  • Zero-noise temperature compensation
    Accurate oxygen quantification by unmatched temperature compensation
  • Ambient light filtering technology
    Improved performance under fluctuating ambient light conditions, e.g. in situ
  • Bleach protection
    Novel multi-component modulation improves lifetime with 50%
  • 50 µm tip
    Optimized design for true microprofiling
  • Fast 430 µm sensor
    For Eddy Covariance and other applications requiring <0.3s response times
  • Robust 3000µm sensor
    For bulk and long-time monitoring applications
  • E2PROM
    Plug'N'Play with unique sensor identification and calibration retrieval
Opto T-drift_700x480 EC Optode_1400x800
...see more
Cables & Connectors
Characteristics
Response Time
Cables & Connectors
Item Standard Options Extra price for option selection
Item
Cable length
Standard
2.0 m
Options
Customized available
Extra price for option selection
Yes, depends on length
Item
Connector
Standard
ST connector with E2PROM
Characteristics
Attribute Standard Options Extra price for option selection
Attribute
Guaranteed lifetime Opto-430
Standard
1 year or 1.5 million datapoints, whichever comes first
Attribute
Guaranteed lifetime Opto-50 and Opto-430 Fast
Standard
1 year or 1.0 million datapoints, whichever comes first
Attribute
Guaranteed lifetime Opto-3000
Standard
1 year or 3.0 million datapoints, whichever comes first
Attribute
Expected lifetime
Standard
+3 years in darkness at room temperature
Attribute
Temperature range
Standard
0-50°C
Attribute
Temperature coefficient
Standard
Temperature compensation when using temperature sensor (ZNTC)
Attribute
Range
Standard
0-100% O2 (0-45 mg/L)
Optimal 0-50% O2 (0-23 mg/L)
Attribute
Detection limit
Standard
0.02% (0.01 mg/L)
50 µm: 0.05% (0.025 mg/L)
Attribute
Waterproof
Standard
Yes
Attribute
Pressure tolerant sensing tip
Standard
Yes
Attribute
Position of sensing tip
Standard
MR, bare fiber, fixed exposed, retractable needle
Attribute
Spatial resolution
Standard
Equals tip size, special slender 50 µm version
Attribute
Response
Standard
Linear when calibrated
Attribute
Interference
Standard
Some organic solvents and chlorine.
Attribute
No cross-sensitivity
Standard
pH 1-14, CH4, H2, CO2, H2S, CH3SH, NH3, any ionic species
Response Time
MicroOptode Response time (90%)
MicroOptode
Opto-50
Response time (90%)
<5 s
MicroOptode
Opto-430
Response time (90%)
<3 s
MicroOptode
Opto-430 Fast
Response time (90%)
<0.3 s
MicroOptode
Opto-3000
Response time (90%)
<15 s
Ordering information & Sizes
Ordering information & Sizes
Opto MicroOptode Fiber diameter and description
Opto MicroOptode
Opto-50
Fiber diameter and description
50 µm for profiling, needle type: 0.6 x 25 mm
Opto MicroOptode
Opto-430
Fiber diameter and description
430 µm, needle type: 1.1 x 25 mm
Opto MicroOptode
Opto-430 Fast*
Fiber diameter and description
430 µm Fast (see note below), needle type: 1.1 x 25 mm
Opto MicroOptode
Opto-MR
Fiber diameter and description
430 µm (for MicroRespiration)
Opto MicroOptode
Opto-SL-1/4
Fiber diameter and description
FT-cell 1/4'' Swagelok Tee
Opto MicroOptode
Opto-PEEK-1/8
Fiber diameter and description
FT-cell 1/8'' PEEK Tee
Opto MicroOptode
Opto-PEEK-1/16
Fiber diameter and description
FT-cell 1/16'' PEEK Tee
Opto MicroOptode
Opto-FT-GLASS-6
Fiber diameter and description
Glass FT-cell 6 mm outer diameter
Opto MicroOptode
Opto-FT-GLASS-8
Fiber diameter and description
Glass FT-cell 8 mm outer diameter
Opto MicroOptode
Opto-3000
Fiber diameter and description
3,000 µm fiber with steel 5 cm cap
Opto MicroOptode
Opto-3000-ST-1/4
Fiber diameter and description
1/4'' steel tube
Opto MicroOptode
Temp-UniAmp
Fiber diameter and description
Temperature sensor
Opto MicroOptode
Opto-Field
Fiber diameter and description
50 µm or 430 µm for Field Opto UniAmp
Opto MicroOptode
Opto-Field 430 Fast
Fiber diameter and description
430 µm Fast for Eddy Covariance
Opto MicroOptode
Opto-Field 3000
Fiber diameter and description
3,000 µm fiber with steel 5 cm cap for Field Opto UniAmp
Opto MicroOptode
Opto-Temp Field
Fiber diameter and description
Temperature sensor for Field Opto UniAmp

*Maximum sampling speed is 1 Hz on lab instruments and 10 Hz on Field Opto UniAmp. In EC-mode up to 16 Hz on Field Opto UniAmp.

Video Guides

Quick Guide MicroOptodes
Quick Guide MicroOptodes

A short presentation of how we make microoptodes, how you can use them, and a look at specifications and customizations.

Measuring Oxygen
Oxygen - optode or amperometric microsensor?

CSO Lars Hauer Larsen reviews the pros and cons of these sensor types for a given application.

Related publications

Cervical spinal injury compromises caudal spinal tissue oxygenation and undermines acute intermittent hyp⁠…
Perim, Raphael R. et al. (2021), Experimental Neurology, vol. 342, 113726
Read more
Two Brassica napus cultivars differ in gene expression, but not in their response to submergence
Wittig, Philipp R. et al. (2021), Physiologia Plantarum, vol. 171, 400-415
Read more

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