REFERENCE ELECTRODES

GMC ELECTRICAL, INC.

QUALITY REFERENCE ELECTRODES OVER TIME.

GMC STAPERM^™
Permanent Underground
Ceramic Reference Electrodes

Permanent Ceramic Reference Electrodes for Underground and
Concrete Encased Applications (Space-Age Porous Ceramic)

In Use at GMC Corrosion Since 1984. Quality You Can Trust.

Features

Available in three sizes:
15 sq. in, .83" dia. x 6" long
28 sq. in1.5" dia. x 6" long
33 sq. in., 1.75" dia. X 6" long.
Greater surface area than other standard electrodes allows greater accuracy readings.
Electrode does not dry out in arid soils. Moisture content change in soil has no effect on electrode.
Electrode has an infinite shelf life. Minimum service life is 20 years.
Copper-copper and zinc-zinc sulfate electrodes are equipped with advanced chloride ion trap to prevent chloride contamination.
All electrodes are side-reading.
All electrodes are color-coded for electrode type determination.

STAPERM^™ Model CU-1-UGPC
Copper-Copper Sulfate (Cu-CuSO₄)

Size: 1.5" dia. x 6" long space-age ceramic tube with yellow protective caps.
Lead Wire: 50' OF #14 RHH-RHW yellow.
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 135°F ( 0°C to 57.2°C).
$ 125.00 each

STAPERM^™ Model Zn-4-UGPC
Zinc-Zinc Sulfate (Zn-ZnSO₄)

Size: 1.5" dia. x 6" long space-age ceramic tube with red protective caps.
Lead Wire: 50' OF #14 RHH-RHW red or black
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 135°F ( 0°C to 57.2°C).
$125.00 each

STAPERM^™ Model AG-4-UGPC
Silver-Silver Chloride (Ag-AgCl)

Size: 1.5" dia. x 6" long space-age ceramic tube with blue protective caps.
Lead Wire: 50' of #14 RHH-RHW blue or black.
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 135°F ( 0°C to 57.2°C).
$ 155.00 each

GMC STAPERM™
Underground Reference Electrodes

Permanent Prepackaged Underground Reference Electrodes

Used by Industry Since 1971

STAPERM^™ Model CU-1-UG
Copper-Copper Sulfate (Cu-CuSO₄)

Size: 2" dia. x 7" long high impact ABS plastic tube.
Packaging: Special non-polarizing backfilled in yellow cotton bag.
Overall size: Approx. 6" dia. x 14" long.
Weight: Approx. 15 lbs.
Special sizes: Upon request.
Reinforcing Rods: 1/4" x 3" PVC at electrode end.
Lead Wire: Standard 50' of #14 RHH-RHW.
Design Life: 20 years.
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 132°F
$125.00 each

STAPERM^™ Model AG-4-UG
Silver-Silver Chloride (Ag-AgCl)

Size: 2" dia. x 7" long high impact ABS plastic tube.
Packaging: Special non-polarizing backfilled in blue cotton bag.
Overall size: Approx. 6" dia. x 14" long.
Weight: Approx. 15 lbs.
Special sizes: Upon request.
Reinforcing Rods: 1/4" x 3" PVC at electrode end.
Lead Wire: Standard 50' of #14 RHH-RHW.
Design Life: 20 years.
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 150°F
$155.00 each

STAPERM^™ Model Zn-4-UG
Zinc-Zinc Sulfate (Zn-ZnSO₄)

Size: 2" dia. x 7" long high impact ABS plastic tube.
Packaging: Special non-polarizing backfilled in red cotton bag.
Overall size: Approx. 6" dia. x 14" long.
Weight: Approx. 15 lbs.
Special sizes: Upon request.
Reinforcing Rods: 1/4" x 3" PVC at electrode end.
Lead Wire: Standard 50' of #14 RHH-RHW.
Design Life: 20 years.
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 132°F
$125.00 each

GMC STAPERM^™
Permanent Fresh Water
Service Electrodes

In Use Since 1984. Quality You Can Trust.

Features
Color-coded for easy identification
Infinite shelf life
Minimum service life 20 years
High impact ABS plastic housing
Corrosive environment resistant
Chloride ion trap equipped copper sulfate and zinc sulfate

STAPERM^™ Model CU-2-FW
For Fresh Water Service
Copper-Copper Sulfate (Cu-CuSO₄)

Size: 1" dia. x 8" long ABS plastic high impact yellow tube
Lead Wire: 50' of #14 RHH-RHW yellow wire.
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: +32°F to 135°F.
$125.00 each

STAPERM^™ Model Zn-4-FW
For Fresh Water Service
Zinc-Zinc Sulfate (Zn-ZnSO₄)

Size: 1" dia. x 8" long ABS plastic high impact red tube
Contac Plug: 1" diameter porous ceramic
Lead Wire: 50' of #14 RHH-RHW black or red wire.
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: +32°F to 135°F.
$125.00 each

GMC STAPERM™
Portable Reference Electrodes

Liquid or Gelatin Filled Rechargeable Space
Age Ceramic Plugs Pointed, Round or Flat

Quality You Can Trust.

Features
Color-coded for easy identification
Infinite shelf life
Minimum service life 20 years
High impact ABS plastic housing
Corrosive environment resistant
Chloride ion trap equipped copper sulfate and zinc sulfate

STAPERM^™ Model CU-4-PT
Copper-Copper Sulfate (Cu-CuSO₄)
Portable Reference Electrode

Connection Stud: 1/4"-20 copper.
Size: 1" dia. x 8" long ABS plastic high impact yellow housing.
Stability: +/-10 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 135°F.
$85.00 each

STAPERM^™ Model Zn-5-PT
Zinc-Zinc Sulfate (Zn-ZnSO₄)
Portable Reference Electrode

Connection Stud: 1/4"-20 plated brass.
Size: 1" dia. x 8" long ABS plastic high impact red housing.
Stability: +/-10 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 135°F.
$85.00 each

STAPERM^™ Model AG-4-PT
Silver-Silver Chloride (Ag-AgCl)
Portable Reference Electrode

Connection Stud: 1/4"-20 plated brass.
Size: 1" dia. x 8" long ABS plastic high impact blue housing.
Stability: +/-10 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 150°F.
$100.00 each

GMC STAPERM™
"Heavy" Portable Reference Electrodes

Liquid or Gelatin Filled Porous Ceramic Contact Plug

Features

Color coded for easy identification.
Infinite shelf life
Minimum service life 20 years.
PVC plastic housing, corrosive environment resistant.
Chloride ion trap equipped copper sulfate and zinc sulfate.

Three models to choose from:

CU-4-PTH Copper-Copper Sulfate (Cu-CuSO₄) "Heavy" Liquid or Gelatin Filled Portable Reference Electrode	Connection Stud: 3/8" copper. Size: 2" dia. x 4. long PVC yellow tube. Stability: +/- 5 millivolts with 3 microamp load. Temperature Range: 32°F to 135°F. $100.00 each
ZN-5-PTH Zinc-Zinc Sulfate (Zn-ZnSO₄) "Heavy" Liquid or Gelatin Filled Portable Reference Electrode	Connection Stud: 3/8" copper. Size: 2" dia. x 4. long PVC blue tube. Stability: +/- 5 millivolts with 3 microamp load. Temperature Range: 32°F to 135°F. $100.00 each
AG-4-PTH Silver-Silver Chloride (Ag-AgCl) "Heavy" Liquid or Gelatin Filled Portable Reference Electrode	Connection Stud: 3/8" copper. Size: 2" dia. x 4. long PVC red tube. Stability: +/- 5 millivolts with 3 microamp load. Temperature Range: 32°F to 135°F. $105.00 each

GMC STAPERM™
Silver - Silver Chloride
Portable Salt Water Reference Electrodes

Portable silver - silver chloride reference electrodes for use in estuaries
brackish water river mouths sea water high chloride waters

Quality You Can Trust. Three Models to Choose From.

Model AG-4-PT1

This portable electrode is rugged for deep water use and can be used in salt water and saturated saline water conditions such as offshore platforms, offshore pipelines and seawater docks (SSP).

Features

Tapered end caps protect sealed connection and eliminate platform/dock snags.
Special PVC housing for streamlined attachment of electrode weights.
Electrodes color-coded blue for ease of cell type determination.
Special silver-silver chloride rod allows for calibration and chloridizing repair if needed in field prior to use.
Ideal for use with R.O.V. equipment.
Available in dual element upon request.
Standard weights: 1 ¼ lbs, 2 ½ lbs, 3 ¾ lbs.
Electrode size: 1 5/16" dia. x 9" long.
w/1 lb weight $217.00 each
w/3 3/4 lb weight $240.00 each

Model AG-4-PT2

Portable electrode designed for standard everyday use in 0 -100' water depths. Can be used in salt water and saturated saline water conditions such as offshore platforms, offshore pipelines, seawater docks (SSP) and boats or ships.

Features

High-impact ABS plastic housing with 50'of RHH-RHW cable.
Pre-weighted.
Special silver - silver chloride element allows for calibration and chloridizing if needed in the field prior to use.
Ideal for medium to light potential work.
Color coded blue for ease of electrode type determination,
1" dia. x 8" long.
$110.00 each

Model AG-4-PT3

Portable electrode designed for light everyday use for performing potential surveys on private yachts and boats.

Features

High-impact ABS plastic housing with 25’ of #14 tinned copper cable, marine grade.
Pre-weighted.
Special silver-silver chloride element allows for calibration and chloridizing repair if needed in the field prior to use.
Ideal for performing potential surveys on yachts and small boats.
Color coded light blue for ease of electrode type determination.
1" dia. x 5" long
$79.95 each

GMC STAPERM™
Permanent High Chloride Water
Service Electrodes

In Use Since 1984. Quality You Can Trust.

STAPERM™ Model AG-3-SW
For Salt Water Service
Silver-Silver Chloride (Ag-AgCl)

Size: 1" x 8" long ABS plastic high impact blue tube.
Contact Plug: 1" diameter porous ceramic.
Lead Wire: 50' of #14 RHH-RHW black or blue wire.
Stability: +/- 5 millivolts with 3.0 microamp load.
Temperature Range: 32°F to 150°F
Service Life: 20 years
$155.00 each

GMC Deltaperm Apache™
Silver - Silver Chloride
Deep Salt Water Reference Electrode

Permanent / portable, highly stable, deep-water silver - silver chloride
reference electrode for use in salt water or saline water conditions:
offshore platforms offshore drilling rigs offshore pipelines
seawater docks steel sheet pile.

In Use Since 1984 – Quality You Can Trust

AG-5-SW

Specifications

Size: 1 ½"x 8" long slotted PVC plastic pipe, color coded blue.Available with
5, 10, 15 & 20 lb weights.
Lead Wire: Std. 50' of #10 RHH-RHW (black)
Porous Ceramic Filter Tube: Implosion proof filter chamber.
Silver Rod: Chloridized and coiled, .999 pure silver element.
1/2" dia. female pipe fitting for media backflush and weight attachment.
Design Life: 20 years.
Stability: +/- 5 millivolts with 10 microamp load.
Temperature: 32°F to 150°F

Features

Special ceramic filter tube with seawater chamber eliminates pressure implosion.
Self equalizing.
Special slotted 1 1/2" PVC protective outer case.
High-quality tapered end caps protect connection and eliminate platform / dock snags.
Special backflush fitting allows filter media to be backflushed without cell removal. Fitting can be used for special weight attachment.
Electrode color coded blue for ease of cell determination.
Special silver-silver chloride rod allows for in-place calibration and chloridizing repair if needed.
$330.00 each

GMC STAPERM™
Permanent Thru-Hull Reference Electrodes

Available in Three Models: Copper-Copper Sulfate,
Zinc-Zinc Sulfate, and Silver-Silver Chloride

Quality You Can Trust.

The GMC STAPERM™ thru-hull mounting assembly is designed to provide easy installation of special submersible STAPERM™ reference electrodes. Each electrode comes complete with a test lead junction box, electrode sealing system and 3/4" NPT threaded fitting for mounting directly through the structure wall. The electrode can be readily removed and reinstalled from the exterior of the vessel (not under pressure).

Specifications

Minimum 20-year service life
1/2" x 6" long Teflon tube mounted in high pressure packing gland
with 3/4 NPT.
Pressure Rating 350 PSI
Stability +/- 5 millivolts with 3.0 microamp load
Temperature limit 140°F
Copper Copper Sulfate CU-6-TH $656.00 each
Zinc Zinc Sulfate ZN-6-TH $656.00 each
Silver Silcer Chloride AG-6-TH $671.00 each

GMC STAPERM™
Contact Eliminator Reference Casing

The GMC "Contact Eliminator" is designed to be used in areas where electrode to earth electrical contact is questioned. Its body is a standard 2 ½" dia. x 6' long Schedule 40 PVC special slotted casing. The slotted end of the casing has a special permeable ½" thick casing seal designed to retain moisture around the casing. The casing is filled with GMC "Fast-Gel" (a special low resistivity contact gelatin).

The casing "Contact Eliminator" Kit comes with the 6' sealed casing, 2 ½" dia. casing plug with ¼"-20 threaded studs for testing (T/S) and "Fast-Gel" gelatin powder.

Features

2 1/2" dia. x 6' long Schedule 40 PVC with special slotted casing.
Special designed casing seal to retain moisture.
Special low resistivity gelatin backfill.
Special casing plug with built-in test station lugs.
Three models:
Copper CEF-7-YEL, Zinc CEF-7-RED, and Silver CEI-7-BLU.
All models $130.00 each

GMC Electrical, Inc.

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