• Low cost
• Easy to use
• Reliable
• Rugged

• Replaceable CPT porous plug
• Lexan tube with window
• Extra heavy top cap

All copper sulfate electrodes are shipped dry but include a charge of high-purity copper sulfate crystals. A protective cap for the CPT porous plug is also supplied. Special lengths of RE-5, RE-5C and RE-7 are available on special order. Use and Maintenance Instructions are furnished with each electrode.

Standard Model. Flat CPT Porous Plug, for general use in soil and (with Submersible Adapter) for use in water. Approximate overall Size: 1-3/8" dia. x 6" long. Dry weight: 4 oz.

Similar to Model RE-5 except supplied with a cone-shaped CPT porous plug. For use in soft soils. Provides lower contact resistance. When pushed into soft soils, the shape of the plug helps the electrode to "stand up." Approximate overall size: 1-3/8" dia. X 6 3/4" long. Dry weight: 5 oz.

For use on underside of bridge decks, parking garages, etc. in upside-down position.

Long, slim model with beveled CPT porous plug. For general purpose use in soil or in a 1" diameter augered hole in pavement. Approx. overall Size: 1" dia. x 8-1/2" long. Dry weight: 5 oz.

Large diameter (3") flat CPT porous plug provides greater contact area. Flat plug provides lower contact resistance than rounded or serrated plug when placed in direct contact with flat surfaces. Especially useful on pavements, dry sand, frozen soil, etc. Stands by itself. Approximate overall size: 3" dia. x 5" long. Dry weight: 16 oz.

Antimony Reference Electrode
Used in conjunction with a Copper / Copper Sulfate reference electrode and voltmeter to measure the pH of soil. The tube assembly of the electrode is etched with the conversion table of millivolts to pH. Approximate overall size: 7/8" dia. x 8" long.

Silver/Silver Chloride Reference Electrode Kit: Land/Sea
Used on land with Lexan tube, CPT ceramic plug and KCl filling solution. Used in sea water with perforated Lexan tube, brass submersible weights (any number of weights can be attached together, two included in kit) and standard 8' submersible adapter (available in additional lengths).

Extension, Cat. No. 16203

Intermediate electrode extension, 30" long. One or more can be used with MCM Model I.A. and LC series meters, or between the electrode and the standard electrode extension, so that the electrode can be easily placed at the desired location inside manholes, water tanks, etc. Will fit through a 1" diameter augered hole.

Extension, Cat. No. 16101

Intermediate electrode extension, 30" long, with side terminal connection that allows use of the electrode without bending over or stooping. Extensions are also available in 15" lengths by special order.

Converts any MCM Electrode for use underwater. Includes your choice of lead length (8', 25', 50', 100', 150' or 200') with 27-C Copper Test Clip attached. Water tight connection.

Finely divided high-purity crystals. Available in 3/4 lb(Cat. No. 16906) and 21/2 lb (Cat. No. 17003) containers. Under normal conditions, a 3/4 lb container will be sufficient to maintain one electrode for a year.

For use with any MCM's Electrode. Permits potential measurements with temperature as low as -10oF (-23oC) without danger of cracking electrode tube. Available in 8 fl. oz. (Cat. No. 17105) and 32 fl. oz. (Cat. No. 17207) containers. Can be used year round.

Replacement or spare plug assemblies are available for all electrodes and are supplied with an "O" ring gasket and a protective cap. Note that the RE-5 and RE-5C plugs are interchangeable.

Advantages

• Potential measurements through small holes.

• Probe into bore holes or paving inserts.

• Packaged with distilled water or antifreeze.

• Precision-machined for reliable, leak-proof seals.

• Non-leak tubular carrying case.

Model EXT-375 Extendible Electrode

    
Advantages

• Threaded connections will not pull apart.

• Sections internally wired for continuity.

• High purity copper sulfate electrode.

• Circumferential and longitudinal wound fiberglass for exceptional strength.

The M.C. Miller Co. "RE-" series of electrodes provides three areas of improvement over other electrodes formerly available. These are: a Lexan Tube, a CPT ceramic plug, and a strong top cap with a 1/4" high-purity copper rod with 1/4 x 20 external thread and brass knurled nut. The CPT ceramic plugs offer numerous advantages:
  

• The porosity of the CPT ceramic plug is uniform and controlled. All ceramic plugs are alike.
• The CPT ceramic plug is fast wetting, and the electrode can be used within minutes after filling. (It often takes many hours to wet up a wood plug).
• The CPT ceramic plug is pre-treated to provide lower electrical resistance which remains low as long as the plug is moist with saturated copper-sulfate solution.
• A CPT ceramic plug can become thoroughly dried out, and it will re-wet in a few minutes with the same low resistance. It is not necessary to keep the electrode in a position where the solution will be in contact with the plug.
• Tests indicate that it is not necessary to keep the CPT plug covered to prevent drying when not in use. It is, however, desirable to do so, and a protective cap is provided for this purpose.
• The CPT ceramic plug is housed in a high-density polyethylene fitting, which helps protect it against chipping or breaking in the event it is accidentally dropped.

The brilliant orange color of the Lexan tube was selected to provide an electrode which can be readily seen in grass, and to help locate it when it is placed remote or when it breaks loose from the "pull-in" lead. Some of its other advantages are:

• The Lexan tube used in the Model RE-5, RE-5C and RE-7 electrodes is extruded in two colors, orange and clear. The orange is opaque and provides a sun shield to eliminate the small potentials which sometimes occur with full transparent tubes. A clear transparent section extending the length of the electrode provides a window for visual inspection to observe the condition and level of the copper-sulfate solution. We believe this window is essential to maintain the electrode in good condition. Lexan is also used in the body of the Model RE-3A Electrode, but the color is painted on the inside rather than extruded. An inspection window is provided.
• The Lexan tube is highly resistant to damage. It can be misused, pushed into soft ground, dropped, and carried in a tool kit without breaking.

The top caps of the Model RE-5, RE-5C and RE-7 are heavy and strong. They are machined out of high-density polyethylene rod, and are extra thick where the copper rod is threaded through. A neoprene gasket provides a liquid and air tight seal. The top cap of the Model RE-3A is molded Cycolac, as is the plug receptacle.