Redox electrode acc. to Mansfeldt

In-situ monitoring of redox potential (EH, ORP) in soils

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Redox probe: Measures the redox potential (EH, ORP) in soils, permanent application in field or laboratory, even under water-saturated conditions

  • Special design for permanent application in soils
  • Small dimensions
  • Application in field and laboratory
  • Normalized platinum surface for improved reproducibility
  • Mobile readout or stationary using the connection module for enviLog
  • Designed by Prof. Dr. Mansfeldt, University of Cologne
  • 25 Years of experience in soil science within laboratories and in the field
  • Original idea of Prof. Mansfeldt (Professor of Soil Geography / Soil science, University of Cologne). The joint development of the probe design, in partnership with Prof. Mansfeldt, began in 2004.
  • Extremely durable technology. The oldest measuring system has been in continuous operation with ecoTech electrodes since 2010. Some sensors have been submerged in groundwater, up to 150 cm depth, for 95 % of their operational time.
  • More than 1300 electrodes worldwide in operation
  • The measuring system consists of measuring and reference electrodes
  • Measuring electrodes are maintenance free
  • Maintenance of the reference electrode is easy, without the need to dismantle or disrupt the measuring electrodes
  • Central data collection is possible, with the combination of an SDI-unit, long cable runs are possible as well as the use of remote data transmission
  • Can be combined with ecoTech pH-electrodes in the same system
  • Ideal for long-term monitoring
Measuring range: -1 ... +1 V
Resolution: 1 mV
Platinum rod  
Material: 99,95 % Pt, hard drawn
Length: L = 5 mm
Diameter: 1 mm
Shaft  
Material: Carbon fiber
Length: 30 cm, other lengths available on request
Diameter: 6 mm
Cable  
Length: 3 m, other lengths avalable on request
Literature with reference to this product:
  • Mansfeldt, T. (2003): In situ long-term redox potential measurements in a dyked marsh soil; J. Plant Nutr. Soil Sci., 166, 210-219.
  • Mansfeldt, T. (2004): Redox potential of bulk soil and soil solution concentration of nitrate, manganese, iron, and sulfate in two Gleysols; J. Plant Nutr. Soil Sci., 167, 7-16.
  • Weigand H., T. Mansfeldt, S. Wessel-Bothe & C. Marb (2005): Bulk soil redox potential and arsenic speciation in the pore water of fen soils; in W. Skierucha & R.T. Walcak (eds.): Monitoring and modelling the properties of soil as a porous medium: the role of soil use; International conference, Lublin; 44-46.
  • Dorau, K. & T. Mansfeldt (2016): Comparison of redox potential dynamics in a diked marsh soil: 1990 to 1993 versus 2011 to 2014; J. Plant Nutr. Soil Sci., 179, 641-651.
  • Wang, J. et al. (2018): Characterizing redox potential effects on greenhouse gas emissions induced
    by water-level changes. Vadose Zone J. 17:170152. doi:10.2136/vzj2017.08.0152.
  • Dorau et al. (2020): Climate change and redoximorphosis in a soil with stagnic properties; Catena 190:104528.
  • K. Dorau, B. Bohn, L. Weihermüller and T. Mansfeldt, Temperature-induced diurnal redox potential in soil, Environmental Science: Processes & Impacts, 2021, DOI: 10.1039/D1EM00254F. 10.1039/D1EM00254F pubs.rsc.org/en/content/articlelanding/2021/EM/D1EM00254F