measure redox potential in microenvironments
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
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.
part numbers and outside tip diameter
- RD-10: 8-12 µm
- RD-25: 20-30 µm
- RD-50: 40-60 µm
- RD-100: 90-110 µm
- RD-500: 400-600 µm
- RD-MR: 400-600 µm
- RD-N: 1.1 mm
- RD-NP: 1.6 x 40 mm – needle sensor for piercing
- RD-Eddy: 15-25 µm
reference electrode for redox microelectrodes
Reference electrodes from Unisense are simple silver/silver-chloride open-ended electrodes designed to work with potentiometric microelectrodes (e.g. Unisense pH and Redox microelectrodes). For measurements with these sensors, it is important that the measuring sensor is in fluid contact with the reference. For most purposes this can be achieved with a large macro-reference. For some applications the sample is so small (e.g. a droplet) that the reference must be as small as the measuring microelectrode.
For laboratory use, Unisense provides a macro reference electrode from Radiometer Analytical. Our micro-sized reference electrodes are glass electrodes manufactured at Unisense. For in situ use, Unisense manufactures a pressure-compensated macro electrode.
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