Product Overview
Marine Ag/AgCl Reference Electrode is designed for long-term corrosion
potential monitoring and cathodic protection (CP) systems in marine and
offshore environments. It provides a stable and reliable reference potential in
high-chloride conditions such as seawater, making it the preferred reference
electrode for submerged and offshore applications.
Ag/AgCl reference electrodes are widely used in offshore platforms, subsea
pipelines, ship hulls, and coastal metal structures where accurate CP potential
measurement is critical for asset integrity and corrosion control.
Operating Principle
The electrode operates based on the reversible electrochemical equilibrium
between metallic silver (Ag) and silver chloride (AgCl) in a
chloride-containing electrolyte.
This equilibrium produces a stable and reproducible reference potential
relative to seawater, ensuring accurate and repeatable potential measurements
for cathodic protection assessment.
Typical Applications
Key Features
Technical Specifications (Typical)
|
Parameter |
Typical Value |
|
Electrode Type |
Ag/AgCl (Silver/Silver Chloride) |
|
Reference Potential Accuracy |
±5 mV after stabilization |
|
Potential Stability |
±1 mV over 24 hours |
|
Operating Temperature |
–5 °C to +90 °C |
|
Electrode Material |
High-purity silver & AgCl |
|
Construction |
Seawater-compatible housing |
|
Cable Length |
Standard or customized |
|
Design Service Life |
≥ 30 years (in seawater) |
|
Insulation Resistance |
> 1 MΩ (typical) |
|
Environmental Use |
Fully submerged seawater |
|
Temperature Coefficient |
~ –0.65 mV/°C |

Note: Specifications may vary
depending on model and application.