INDUSTRY COMPONENT

pH Sensor Assembly

Precision pH sensor assembly for automated monitoring and dosing systems in industrial applications

Component Specifications

Definition
A complete pH sensor assembly designed for integration into automated pH monitoring and dosing systems, consisting of a glass electrode, reference electrode, temperature sensor, and protective housing. This component provides continuous, real-time pH measurement in industrial processes with high accuracy and reliability, enabling automated chemical dosing control.
Working Principle
The pH sensor assembly operates on the potentiometric principle, where the glass electrode develops a potential proportional to hydrogen ion concentration. The reference electrode provides a stable reference potential. The combined electrode potential is measured against the reference, with temperature compensation ensuring accurate pH readings across varying process conditions.
Materials
Glass electrode: pH-sensitive glass membrane (typically lithium silicate glass); Reference electrode: Ag/AgCl or calomel reference system with KCl electrolyte; Body: Chemical-resistant materials (PP, PVDF, or PEEK); Junction: Ceramic, PTFE, or glass frit; Cables: Shielded, chemical-resistant cable with IP67/IP68 rating
Technical Parameters
ParameterTypical rangeNotes & selection driver
Accuracy±0.01 pH
Cable LengthStandard 5m, options up to 20m
Output Signal4-20 mA or digital (Modbus, Profibus)
Response Time<30 seconds to 95% of final value
Pressure RatingUp to 10 bar
Measurement Range0-14 pH
Temperature Range0-100°C
Process Connection3/4" NPT, G1/2", or flange mount

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards
ISO 15839, DIN 19261, IEC 60746, ASTM D1293

Parent Products

This component is used in the following industrial products

Engineering Analysis

Risks & Mitigation
  • Glass membrane breakage
  • Reference electrode contamination
  • Temperature sensor drift
  • Junction clogging
  • Cable damage in harsh environments
FMEA Triads
Trigger: Chemical attack on glass membrane
Failure: Inaccurate pH readings leading to improper dosing
Mitigation: Use chemical-resistant glass formulations, implement regular inspection protocols, install protective sleeves
Trigger: Reference electrolyte depletion
Failure: Unstable reference potential causing measurement drift
Mitigation: Implement automatic electrolyte refill systems, schedule regular maintenance, use gel-filled reference electrodes
Trigger: Temperature sensor calibration drift
Failure: Incorrect temperature compensation affecting pH accuracy
Mitigation: Use dual temperature sensors for redundancy, implement automatic calibration routines, select high-stability RTD sensors

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance
±0.01 pH at 25°C, ±0.5°C temperature accuracy
Test Method
Two-point calibration verification, temperature response testing, pressure leak testing, electrical continuity verification

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of pH Sensor Assembly

Manufacturer profiles associated with pH Sensor Assembly.

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Frequently Asked Questions

How often should pH sensor assemblies be calibrated?

Industrial pH sensors should be calibrated at least once per week for critical processes, or according to manufacturer recommendations. Two-point calibration using pH 4.01 and 7.00 or 10.01 buffer solutions is standard practice.

What maintenance is required for pH sensor assemblies?

Regular maintenance includes cleaning the electrode surface, checking and refilling electrolyte solution, replacing junction materials as needed, and verifying temperature sensor accuracy. Protective sleeves should be inspected for cracks or contamination.

Can pH sensor assemblies handle high-temperature processes?

Yes, specialized high-temperature versions are available with reinforced glass membranes and heat-resistant materials that can withstand temperatures up to 130°C, though standard models typically operate up to 100°C.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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