PH5022 Germany Glass pH Sensor for Industrial and Laboratory Liquids Treatment

Introduction

The PH5022 Germany Glass pH Sensor represents a high-end industrial combination electrode that adopts premium German-sourced low-impedance hemispherical glass, a high-precision Ag/AgCl reference system, and advanced ceramic junctions to achieve outstanding performance in extreme operating conditions.

This unified-shaft design houses both the measuring and reference elements in a single, robust glass body, eliminating external cables between halves and simplifying immersion or flow-through installation. The sensor’s high-temperature-tolerant electrolyte and pressure-resistant construction ensure long-term stability with minimal zero-point drift and rapid equilibration, even when exposed to repeated thermal cycles up to 130°C or pressures reaching 6 bar.

By incorporating high-purity materials and precise manufacturing tolerances, the PH5022 pH sensor and meter with glass body delivers laboratory-grade accuracy in continuous online applications, significantly outlasting conventional electrodes in hot, pressurized, or chemically aggressive processes while requiring fewer calibrations and replacements.

Working principle

The PH5022 glass-made pH value measurement functions as a classic potentiometric combination electrode.

Firstly, the hemispherical pH-sensitive glass membrane at the tip develops a boundary potential directly proportional to the difference in hydrogen-ion activity between the internal buffer solution and the external process medium.

Then, this potential is measured against the stable Ag/AgCl reference half-cell, which maintains constant output through a high-viscosity electrolyte and multiple ceramic junctions that provide excellent ion conduction while resisting poisoning.

Finally, the resulting millivolt signal follows the Nernst relationship (approximately 59.16 mV per pH unit at 25°C), with the sensor’s high slope (>96%) and low internal resistance ensuring fast, reliable conversion to accurate pH values, even at elevated temperatures where many electrodes lose sensitivity.

Key features

Designed for industrial, laboratory, or other harsh environments, pursuing uncompromising performance under thermal and mechanical stress, the PH5022 stands out with the following highlights:

• Premium German Hemispherical Glass: Low-impedance formulation for rapid response (<1 minute) and high slope efficiency (>96%).
• High-Temperature & Pressure Resilience: Continuous operation from 0–130°C and up to 6 bar without deformation or leakage.
• Advanced Reference System: Ag/AgCl cartridge with high-viscosity KCl electrolyte and ceramic junctions for superior stability and poison resistance.
• Zero-Point Precision: 7 ± 0.5 pH with minimal drift across temperature cycles.
• Standard Industrial Interface: Pg13.5 threading and K8S (VP-compatible) connector for direct drop-in replacement in most electrode holders.
• Optional Integrated Temperature Sensor: Allows automatic compensation when paired with compatible transmitters.
• Unified Shaft Construction: Compact, all-in-one design that reduces installation complexity and improves mechanical robustness.

Specification

Applications

The PH5022 glass membrane pH sensor is the electrode of choice wherever process conditions push standard sensors beyond their limits:

• Pharmaceutical sterilization (SIP): Withstands repeated 130°C steam cycles while maintaining calibration integrity.
• Power plant boiler feedwater and condensate: Accurate pH control in high-temperature, low-conductivity pure water systems.
• Chemical reactors and autoclaves: Reliable measurement in hot acids, alkalis, or pressurized reaction mixtures.
• Food & beverage thermal processing: Hot-fill lines, retorts, and pasteurization systems requiring robust, cleanable electrodes.
• Petrochemical and refinery streams: High-temperature hydrocarbon processing and catalyst regeneration.
• Any high-performance industrial process: Where precise pH data at elevated temperature and pressure directly impacts product quality, yield, or equipment protection.