Staperm Permanent Fresh Water Reference Electrodes by GMC

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.  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. 

Created by: Pipeline Corrosion Control

Last updated 11/2025

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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.  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. 
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