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Staperm Permanent Underground Ceramic Reference Electrodes by GMC

Description 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 30 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).  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).  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). 

Created by: Pipeline Corrosion Control

Last updated 11/2025

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Description

Description 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 30 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).  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).  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). 
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