Model CP-GRA - Graphite Probe

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

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.