Graphite Probe Data Sheet

Typical Application:

  • Bridge decks and substructures, parking garages, docks, and buildings

Featuring:

  • Low cost graphite element
  • Short term stability for making relative measurements such as E log I or potential decay

Product Drawing

Installation Drawing

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Housing Specifications

3/4" dia x 3 1/2" long
 Element Specifications

Max. grain size - 0.008"
Apparent density - 1.68 gm/cc
Termination

SWnnn - nnn ft. #14 AWG HMW/PE		 Model Designation

Specify as EDI Model CP-GRA-SWnnn
nnn = Length of lead wire

Application Notes:

The Model CP-GRA should be installed as close as possible to the rebar where measurements are to be taken. A graphite probe is not an equivalent substitute for an Ag/AgCl reference electrode such as the EDI Model CB-AGG. The rest potential of graphite is dependent upon the oxygen level in the surrounding concrete. Consequently, its potential can show long term variations of 150 mV or more. Therefore, a graphite probe should only be used as a short term stable reference point for measurements such as E log I, instant off or potential decay.