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Redox Electrode

Measure redox potential in microenvironments

With the tip size down to 10 µm, less than 5 seconds in response time, and 1 mV in resolution, the Unisense Redox microsensor offers a high quality research tool for reliable and fast measurements.

The microsensor construction makes it possible to use the Redox microsensor in a broad variety of research fields where non-destructive, fast and accurate measurements are required. The redox microelectrode is designed for research applications within:

  • Environmental sciences
  • Biomedical sciences
  • Biotechnology
  • Microbiology

Microelectrode technology:

The Redox electrode tip will develop an electrical potential relative to the reference electrode when both electrodes are immersed in the same solution and connected to a high-impedance millivolt-meter e.g. the Unisense pH/mV-Meter. This potential reflects the tendency of the solution to release or take up electrons; also called the Oxidation-Reduction Potential (ORP). The Unisense Redox microelectrode can be used for measurements in salinities from 0 to full ocean strength.

The reference electrode can be either external (separate electrode) or internal; however, we only recommend internal references in applications where it is not possible to place two electrodes in the sample.

Ordering Information

Standard Glass Sensor Outside tip diameter
RD-10 8-12 µm
RD-25 20-30 µm
RD-50 40-60 µm
RD-100 90-110 µm
RD-200 175-225 µm
RD-500 400-600 µm
RD-500C 400-600 µm (combination electrode with internal reference electrode)
RD-MR 400-600 µm
RD-N 1,1 x 40 mm - needle sensor
RD-NP 1,6 x 40 mm - needle sensor for piercing


Find a complete list of redox microsensor specifications, including warranty and expected life time, below and possible microeletrode customizations and adaptations under Related Products found to the right.

View Redox Microelectrode Specifications

Technical information

View electrode specifications

Related products

Sensor Customization

Kristensen, Erik et al (2011), Contrasting effects of the polychaetes Marenzelleria viridis and Nereis diversicolor on benthic metabolism and solute transport in sandy coastal sediment, Marine Ecology Progress Series, 125 - 139, vol. 425 Read abstract

Schmidt, Oliver et al (2011), Novel [NiFe]- and [FeFe]-hydrogenase gene transcripts indicative of active facultative aerobes and obligate anaerobes in earthworm gut contents, Applied and Environmental Microbiology, 5842 - 5850, vol. 77 Read abstract

Vilalta, Elisabet et al (2005), Structural heterogeneity in cyanobacterial mats is associated with geosmin production in rivers, Phycologia, 678 - 684, vol. 44

See all publications
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