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Permanent Underwater Reference Electrodes
Model IP
Pipe-Type Immersion
Reference Electrode
by Electrochemical Devices, Inc.
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The Model IP
is a compact, economical, dry-type reference electrode for marine applications. It has a
0.840 inch diameter PVC bushing on the termination end. This enables the user to cement on
any ˝ inch socket-end PVC pipe or electrical conduit fitting (e.g. male or female conduit
thread or couplings) for permanent installation. Examples of this are shown on EDI Drawing
PIPAPP2, where ˝ inch PVC couplings serve as transition pieces for running the lead wire
through conduit or attaching the electrode to a wall. For intermittent use, the Model IP
has a blind 1/4-20 hole for attaching up to a 5 lb weight. Should more weight than that be
necessary, the electrode and the weight should be attached to a separate drop line as
shown on EDI Drawing PIPAPP1.
Typical Applications
- Portable use - intermittent potential measurements in
seawater.
- Permanent use - piers, pilings, traveling screens, and other
marine structures.
Features
- Sized to fit standard ˝ inch PVC conduit or fittings
- Rugged white PVC housing
- Ag / AgCl or Zn element for open seawater (marine)
applications
Housing Specifications
- 0.840" dia. at termination end
- 1.0" dia. x 3 1/4" long PVC
Element Types
- AGD: dry-type Ag / AgCl
- ZIN: 99.99% zinc
Terminations
- ST: 1/4-20 threaded stud
- LW: 100 ft. #18 AWG PVC insulated test lead
Dimensions

Model Designation
- Specify as EDI Model IP-XXX-YY, where XXX
= element type and YY = termination type.
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