Portable Copper Sulfate Reference Electrode

ATO Copper Sulfate Electrode features a transparent plexiglass body, 70±30mA stable potential, and a 1-year service life per fill. Ideal for measuring soil stray current and buried metal potential. Get professional-grade accuracy for corrosion engineering today.

Technical Specifications

Features & Benefits

• Stable Potential: A stable 70±3mV output ensures the reference electrode delivers accurate and reliable measurement results in the field.
• Low Polarization: By keeping polarization below ±5mV, this design helps you achieve more consistent readings across multiple test points.
• Transparent Chamber: The acrylic housing allows easy monitoring of electrolyte saturation inside the reference electrode.
• Long Service Life: With over one year of use per filling, you can rely on this reference electrode for long-term applications with minimal maintenance.
• Refillable Design: Instead of frequent replacement, the electrode can be refilled multiple times, reducing overall operating costs.
• Durable Construction: Built with corrosion-resistant connectors and a robust structure, the reference electrode performs reliably even in harsh environments.

Typical Applications

• Pipeline & Underground Structure Testing: Suitable for measuring pipeline potentials, as the 70±3mV stable output of the reference electrode ensures accurate structure-to-soil readings.
• Soil Stray Current Detection: Ideal for soil analysis, where the ＜±5mV low polarization of the reference electrode improves sensitivity to small potential changes.
• Cable Sheath Potential Measurement: Used in cable systems, with the reference electrode providing stable output and controlled ion exchange for consistent results.
• Reinforced Concrete Monitoring: Applied to rebar testing, as the reference electrode maintains stable performance within the 0–45℃ range.
• Cathodic Protection System Control: Serves as a reference electrode in CP systems, where ＞1 year service life per filling supports long-term monitoring.
• Multi-Environment Field Testing: This reference electrode performs reliably in various soils, including clay-rich soil, and freshwater environments.

Note: Due to risks of stability loss, poor contact, reduced accuracy, and shortened service life, this reference electrode is not recommended for high-salinity seawater, dry soil, temperatures above 45℃, or strongly corrosive environments.

Reference Electrode for Pipeline & Underground Structure Testing

Reference Electrode for Cable Sheath Potential Measurement

Reference Electrode for Multi-Environment Field Testing

Technical Comparison

The following comparison highlights the key differences between Copper Sulfate and Ag/AgCl reference electrodes, helping you select the right solution for your application.

Copper Sulfate Reference Electrode ATO-CTL-136: Built for Reliable Field Measurements

Why Choose ATO-CTL-136? Because field conditions demand more than lab-grade precision.

1. Unstable readings in soil environments? Choose a truly field-ready reference.

Many reference electrodes perform well in labs but struggle in real soil conditions. ATO-CTL-136 is designed specifically for field use.

• Stable Potential Output: 70 ± 3 mV (vs. Calomel), with polarization < ±5 mV
• Field-Proven Performance: Maintains consistent readings in clay, mixed soils, and freshwater
• Low Drift in Practice: Minimizes measurement errors in cathodic protection systems
• Pro Tip: In field measurements, stability matters more than theoretical precision.

2. Harsh soil and long-term deployment? Built to last, not just to measure.

Frequent replacement and maintenance can slow down your project. This electrode is made for durability and long service life.

• Robust Structure: Transparent organic glass body with corrosion-resistant connectors
• Long Service Life: Over 1 year per filling, refillable for extended use
• Controlled Leakage: Microporous design ensures stable contact without visible electrolyte loss
• Pro Tip: A durable reference electrode reduces maintenance cost and downtime significantly.

3. Need simple operation in the field? Keep it efficient and hassle-free.

Complex maintenance and fragile designs are not suitable for on-site work.

• Easy Refilling: Screw-type structure for quick solution replacement
• Visual Monitoring: Transparent chamber to check solution saturation anytime
• Ready for Deployment: 1.5 m cable for flexible installation in field measurements
• Pro Tip: The best field equipment is the one you don’t have to constantly fix.

Ready to Upgrade Your Field Measurement Reliability?

The ATO-CTL-136 Copper Sulfate Reference Electrode delivers stable performance, long-term durability, and easy maintenance—making it the ideal choice for soil testing, pipeline monitoring, and cathodic protection systems. Contact us today for technical support, bulk pricing, or customized solutions for your project.