Industry-Verified Manufacturing Data (2026)

pH Electrode

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard pH Electrode used in the Chemical Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical pH Electrode is characterized by the integration of Glass membrane and Reference electrode. In industrial production environments, manufacturers listed on CNFX commonly emphasize pH-sensitive glass construction to support stable, high-cycle operation across diverse manufacturing scenarios.

Electrochemical sensor component that measures hydrogen ion concentration in aqueous solutions by generating a voltage proportional to pH.

Product Specifications

Technical details and manufacturing context for pH Electrode

Definition
A critical sensing element within pH/Conductivity Sensor systems that detects hydrogen ion activity in liquids through a glass membrane, converting chemical information into electrical signals for pH measurement and monitoring.
Working Principle
Operates based on the Nernst equation, where a pH-sensitive glass membrane develops a potential difference proportional to hydrogen ion concentration when immersed in solution, with reference electrode providing stable potential for comparison.
Common Materials
pH-sensitive glass, Silver/silver chloride, Potassium chloride electrolyte, Epoxy body
Technical Parameters
  • Measurement range typically 0-14 pH with accuracy ±0.01 pH (pH) Per Request
Components / BOM
  • Glass membrane
    pH-sensitive element that selectively responds to hydrogen ions
    Material: pH-sensitive glass
  • Reference electrode
    Provides stable reference potential for measurement
    Material: Silver/silver chloride
  • Electrolyte solution
    Maintains ionic contact between reference electrode and sample
    Material: Potassium chloride gel
  • Electrode body
    Protects internal components and provides structural integrity
    Material: Epoxy or glass
Engineering Reasoning
0-14 pH units at 0-80°C with 59.16 mV/pH Nernstian response
Glass membrane potential drift exceeding ±0.02 pH units/hour or reference junction potential shift >5 mV
Design Rationale: Glass membrane hydration layer depletion causing increased membrane resistance above 10^9 Ω or reference electrolyte contamination altering liquid junction potential
Risk Mitigation (FMEA)
Trigger Hydrogen ion exchange site poisoning by heavy metal ions (Ag+, Hg2+) at concentrations >1 ppm
Mode: Non-Nernstian response slope deviation below 54 mV/pH
Strategy: Double-junction reference electrode design with 3.5M KCl outer filling solution as ionic barrier
Trigger Thermal shock exceeding 2°C/minute differential across glass membrane thickness (0.1-0.5 mm)
Mode: Glass membrane microcrack formation increasing impedance to >10^11 Ω
Strategy: Thermal buffer sleeve with thermal conductivity <0.5 W/m·K and maximum gradient limit of 1°C/cm

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for pH Electrode.

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 0-6 bar (0-87 psi) standard, high-pressure models up to 16 bar (232 psi)
flow rate: 0-3 m/s (0-10 ft/s) recommended to prevent abrasion
temperature: 0-80°C (32-176°F) typical, some models up to 100°C (212°F)
slurry concentration: ≤10% solids by weight for standard electrodes, specialized models for higher concentrations
Media Compatibility
✓ Potable water treatment ✓ Chemical process solutions (acids/bases) ✓ Food and beverage production
Unsuitable: Hydrofluoric acid solutions (attacks glass membrane)
Sizing Data Required
  • Process temperature range
  • pH measurement range required
  • Chemical composition of process media

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Reference Junction Contamination
Cause: Process fluid ingress or fouling of the reference electrode, causing drift and inaccurate pH readings due to compromised electrolyte diffusion.
Glass Membrane Degradation
Cause: Chemical attack from high-alkaline solutions (pH >12) or hydrofluoric acid, leading to etching, increased impedance, and slow response times.
Maintenance Indicators
  • Drifting or unstable pH readings despite calibration
  • Visible cracks, cloudiness, or deposits on the glass bulb
Engineering Tips
  • Implement routine cleaning with appropriate solutions (e.g., pepsin-HCl for proteins, dilute HCl for general deposits) and store in KCl storage solution when not in use.
  • Use protective sleeves or flow chambers in abrasive or high-temperature applications, and select specialized glass (e.g., low-resistance, high-temperature) for harsh chemical environments.

Compliance & Manufacturing Standards

Reference Standards
ISO 17025:2017 - General requirements for the competence of testing and calibration laboratories ASTM E70 - Standard Test Method for pH of Aqueous Solutions with the Glass Electrode CE marking - Compliance with EU directives for electromagnetic compatibility and safety
Manufacturing Precision
  • pH accuracy: +/-0.02 pH units
  • Response time: 95% within 30 seconds
Quality Inspection
  • Calibration verification against NIST-traceable buffer solutions
  • Electrode slope and offset measurement per ASTM E70

Factories Producing pH Electrode

Verified manufacturers with capability to produce this product in China

✓ 92% Supplier Capability Match Found

P Project Engineer from United States Feb 18, 2026
★★★★★
"Found 21+ suppliers for pH Electrode on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
S Sourcing Manager from United Arab Emirates Feb 15, 2026
★★★★★
"The technical documentation for this pH Electrode is very thorough, especially regarding technical reliability."
Technical Specifications Verified
P Procurement Specialist from Australia Feb 12, 2026
★★★★★
"Reliable performance in harsh Chemical Manufacturing environments. No issues with the pH Electrode so far."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

19 sourcing managers are analyzing this specification now. Last inquiry for pH Electrode from USA (37m ago).

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Frequently Asked Questions

What makes this pH electrode suitable for chemical manufacturing applications?

This electrode features a durable epoxy body resistant to chemical exposure, pH-sensitive glass membrane for precise measurement in harsh aqueous environments, and a stable silver/silver chloride reference system with potassium chloride electrolyte that maintains accuracy during continuous industrial use.

How does the glass membrane in this pH electrode work?

The pH-sensitive glass membrane develops a voltage proportional to hydrogen ion concentration when in contact with aqueous solutions. This electrochemical potential is measured against the stable reference electrode (silver/silver chloride in KCl electrolyte) to calculate pH values with high accuracy in chemical processes.

What maintenance is required for this industrial pH electrode?

Regular calibration with pH buffer solutions, proper storage in KCl electrolyte solution when not in use, and periodic inspection of the glass membrane and reference electrode junction. The epoxy body requires cleaning from chemical deposits to ensure optimal performance in manufacturing environments.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

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