Through Wall Reference Electrodes

Model CW - Potential Well (Short)

Typical Application:

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

Featuring:

No need to wet down the surface to take potential readings on rebars
Ability to take potential readings under surfaces covered with a membrane or sealer
Elimination of errors from reading through a carbonated surface layer
Fixed location for consistency in comparing data with previous readings
Low in cost; easy to install; simple to use

	Housing Specifications 1 1/2" dia. PVC fitting Pipe plug with 9/16" hex socket Cotton bag with special backfill
	Model Designation Specify as ED Model CW-HOL-Sx x = B for black plug Y for yellow plug

Application Notes:

The Short Potential Well is intended for use where it can be accessed by a portable reference electrode. It is a cost effective way to obtain accurate field data at many locations. The Model CW can also be used to calibrate a permanent embedded reference electrode by placing it adjacent to the permanent electrode. For proper installation, it should be placed as close as possible to the rebar where measurements are to be taken. Ideally, there should be a layer of the original concrete between the potential well and the rebar. To take readings: remove the threaded plug with the hex socket adapter, wet the foam, and then press calibrated portable reference electrode into the foam. For installations where it is not convenient to take potential readings directly over the rebar, such as traffic lanes, bridge substructures or high rise towers and buildings, a version with a salt bridge (Luggin) extension is available. See the EDI Data Sheet for the Potential Well (Long), Model CW-HOL-Lnnx.