Description 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. 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. 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.
Created by: Pipeline Corrosion Control
Last updated 12/2025