Features & Benefits

The features and specifications that are unique to each design are presented in the block sections below, while the features and specifications that are common to all designs are as follows:

• Zero leakage of half-cell filling solution - electrodes do not leak any corrosive elements into the soil
• Zero contamination of electrode by electrolyte – electrode half-cell potential is not affected by electrolyte elements, such as chloride ions
• Both copper/copper sulfate and Ag/AgCl electrodes are available
• Copper/Copper Sulfate Electrode Potentials are in the range 316mV ± 10mV @ 25°C versus the Standard Hydrogen Electrode (SHE)
• The molarity of the KCl filling solution can be specified in the case of Ag/AgCl electrodes (half-cell potentials can be specified in the 200-270mV range @ 25°C versus SHE)
• Electrodes can be stored at temperatures down to -20°C

IonX40 Permanent Electrodes

Unique Specifications:

• Design Lifetime: 40 years
• Electrical Contact Area (with soil): 16.5 sq. inches
• Overall length: 16 inches
• Max. Diameter: 3 inches
• Weight (not including wire): 2.7 lbs

IonXDE Permanent Electrodes

Unique Features & Specifications:

• A Copper/Copper Sulfate electrode and an Ag/AgCl (3.5M KCl) electrode share a common electrolyte in an integrated electrode package (see schematic diagram for design details)
• Structure-to-soil voltages can be taken versus either the CSE or the Ag/AgCl electrode, or versus both electrode types
• The calibration of the CSE electrode can be checked in-situ by taking a potential difference reading versus the Ag/AgCl internal electrode (see MP Article # 2 for details)
• Design Lifetime: 40 years
• Electrical Contact Area (with soil): 16.5 square inches
• Overall length: 16 inches
• Max. Diameter: 3 inches
• Weight (not including wire): 2.7 lbs