Product Catalog

Permanently Installed CuSO4

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These electrodes represent state-of-the-art technology and are a result of MCM’s commitment to on-going research and development for the Cathodic Protection industry. The AccuRef Permanent Electrodes are designed for 40-year life expectancy, de-rated for engineering practices to 20 years.


  • Electrode: Permanent Copper/Copper Sulfate.
  • Applications: Direct burial in soil, assuming low (<500ppm)levels of chloride ion contamination. Accuref Silver/Silver Chloride electrodes are recommended for use in chloride ion contaminated soil.
  • Low Freezing Point: –20oC.
  • Design Life: 20 years.
  • High Purity: Cu/CuSO4 and triple de-ionized H2O.
  • Cost: Less expensive than most Copper Sulfate permanent electrodes.
  • Tip: Moisture absorbent ceramic tip.
  • Evaporation: Will not dry out at low humidity and/or high heat
  • Wire: 25 feet of AWG 12 lead wire; cross-linked Polyethylene jacket, direct burial, low leakage, 600V, 90oC Rating, USE - 12/RHH/RHW-2. Longer lengths of wire are available.
  • Electrical Contact Surface Area: Approx. 16.4 square inches (a cylindrical surface, 1.5 inches in diameter and 3.5 inches in length).

Antifreeze is added to the solution to lower the freezing point to –20 oC . This enables the AccuRef Permanent Electrodes to survive a deep frost without freezing and cracking the electrode.

Boiling point is 100oC.

AccuRef 20 contains 80g of high purity Cu 99.99% and 500ml of saturated Cu/CuSO4.


  • Diameter: 2.77in
  • Length: 15in
  • Weight: 3.9lbs