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Designed for research applications within:
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Electric Potential Microelectrode

Microelectrode to measure electric potential

With the Electric Potential Microelectrode, you can measure gradients in electric potential with very high spatial resolution thanks to the fast response and a tip diameter of 100 µm. Read more...

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Technical Data
Ordering Information & Sizes
Manuals & Videos
EP

Quantify minute differences in electric potential

The Electric Potential microelectrode was originally invented for measuring extremely small gradients in electric potential in sediments (Damgaard et al., 2014). However, it can be used in any application for quantifying minute differences in electric potential in microscale and over large distances.

The Electric Potential microelectrode measures the difference in electric potential between the tip of the Electric Potential microelectrode and the reference electrode. The principle is identical to the originally published microelectrode (Damgaard et al., 2014), and the design has been slightly modified for safe shipping. The microelectrode does not require calibration. You only need to zero the signal under measurement conditions.

The signal is shielded very effectively against electrical noise, making it possible to resolve differences in electric potential of a fraction of a mV. The microelectrode may be used at salinities between freshwater and full ocean seawater.

EP-100 2_1400x800
General
Cables & Connectors
Characteristics
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
<2 mm
Options
<1 mm
Extra price for option selection
10%
Feature
Diameter 50 mm from tip
Standard
8 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
Co-axial, 3 mm
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 connectors
Standard
No
Options
Yes
Characteristics
Attribute Standard Options Extra price for option selection
Attribute
Guaranteed lifetime
Standard
3 months
Attribute
Expected lifetime
Standard
6 months
Attribute
Temperature range
Standard
-10-40°C
Attribute
Reference type
Standard
Ag+ / AgCl
Attribute
Waterproof
Standard
Yes
Ordering information & Sizes
Ordering information & Sizes
Electric Potential Glass Electrode Size and description Options Extra price for option selection
Electric Potential Glass Electrode
EP-100
Size and description
90-110 µm - microelectrode
Options
40-60 µm | 180-200 µm
Extra price for option selection
20%

Related publications

Electric potential microelectrode for studies of electrobiogeophysics
Damgaard, Lars Riis et al. (2014), Journal of Geophysical Research: Biogeosciences, vol. 119, 1906-1917
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Mapping electron sources and sinks in a marine biogeobattery
Risgaard-Petersen, Nils et al. (2014), Journal of Geophysical Research G: Biogeosciences, vol. 119, 1475-1486
Read more