Reference Electrodes
A common method of assessing the corrosion state of reinforcing steel is to measure the steel potential using a reference electrode.

CPT manufactures reference electrodes, which are buried small holes, formed in the concrete surface. They can then be used to measure the steel potential either manually, using a high impedance voltmeter, using a datalogger or remotely using a cellular phone link.

Reference electrodes offer significant advantages versus conventional electrodes as they are based on a manganese oxide composition:

  • High surface area prevents loss of contact with host concrete
  • Chloride free – no release of aggressive salts
  • Excellent polarisation characteristics – stable potential when current is drawn
  • Compact unit facilitates simple installation



MN15 Data Sheet
P90 Data Sheet