pH Electrode for Chemical Manufacturing | Specifications & Verification

Product Specifications

Technical details and manufacturing context for pH Electrode

Definition

The pH Electrode is a component used in chemical manufacturing to measure the acidity or alkalinity of aqueous solutions. It is a critical sensing element within pH/Conductivity Sensor systems, detecting hydrogen ion activity through a pH-sensitive glass membrane. The electrode converts chemical information into electrical signals, enabling pH measurement and monitoring. It operates based on the Nernst equation, where the glass membrane develops a potential difference proportional to hydrogen ion concentration when immersed in solution, with a reference electrode providing a stable potential for comparison. The electrode is constructed with pH-sensitive glass, silver/silver chloride, potassium chloride electrolyte, and an epoxy body. It measures a pH range of 0–14, with an accuracy of ±0.01 pH at 25°C within calibration buffer. Response time is ≤30 seconds to reach 95% of the final value. Operating temperature is 0–80°C for continuous operation, with higher temperatures allowed for short periods. Storage temperature is -10–60°C, and the electrode must be kept moist. Maximum pressure is 0.6 MPa at 25°C; higher pressure may damage the membrane. Zero point is 7.00 ±0.10 pH at 25°C in pH 7 buffer. Slope is 95–102% relative to theoretical Nernstian slope. Internal resistance is ≤250 MΩ at 25°C, increasing with age. Cable length options are 1–5 meters, with BNC connector type standard; other connectors available on request. Body and membrane materials are Glass/PVDF. Weight ranges from 100–200 g depending on cable length and connector. These specifications are directory reference ranges; verify model-specific values with the legal manufacturer or supplier before procurement.

Working Principle

The pH Electrode operates based on the Nernst equation. A pH-sensitive glass membrane develops a potential difference proportional to the hydrogen ion concentration when immersed in an aqueous solution. This potential is measured against a stable reference electrode (silver/silver chloride) immersed in a potassium chloride electrolyte. The voltage difference is converted into a pH reading. The glass membrane selectively responds to hydrogen ions, and the reference electrode provides a constant potential, allowing accurate measurement across the 0–14 pH range.

Common Materials

pH-sensitive glass, Silver/silver chloride, Potassium chloride electrolyte, Epoxy body

Technical Parameters

Parameter	Typical range	Notes & selection driver
Measurement Range	0–14 pH	Full pH range for aqueous solutions
Accuracy	±0.01 pH	At 25°C, within calibration buffer
Response Time	≤30 s	To reach 95% of final value
Operating Temperature	0–80 °C	Continuous operation; higher for short periods
Storage Temperature	-10–60 °C	Keep electrode moist
Maximum Pressure	0.6 MPa	At 25°C; higher pressure may damage membrane
Zero Point	7.00 ±0.10 pH	At 25°C in pH 7 buffer
Slope	95–102 %	Relative to theoretical Nernstian slope
Internal Resistance	≤250 MΩ	At 25°C; increases with age
Cable Length	1–5 m	Standard options; custom lengths available
Connector Type	BNC	Other connectors on request
Material	Glass/PVDF	Body and membrane materials
Weight	100–200 g	Depending on cable length and connector

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

Components / BOM

Glass membrane Part
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 Part
Maintains ionic contact between reference electrode and sample

Material: Potassium chloride gel
Electrode body Part
Protects internal components and provides structural integrity

Material: Epoxy or glass

Applied To / Applications

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

pH/Conductivity Sensor

View system integration details

Temperature & pH Probes

View system integration details

Manufacturers of pH Electrode

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Shanghai BOQU Instrument Co., Ltd.

Shanghai, CN

Also makes: Pressure Controller, pH/Conductivity Sensor, Oxygen Probe / Analyzer and 2 more

Listed on the company's own website · profile compiled by CNFX from public sources

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Frequently Asked Questions

What is the measurement range of this pH electrode?

The directory lists a measurement range of 0–14 pH for aqueous solutions. However, actual performance may vary by model and application, so verify with the manufacturer.

What is the operating temperature range?

The listed operating temperature is 0–80°C for continuous operation, with higher temperatures allowed for short periods. Storage temperature is -10–60°C, and the electrode must be kept moist.

What is the maximum pressure the electrode can withstand?

The maximum pressure is 0.6 MPa at 25°C. Higher pressure may damage the membrane, so ensure the application does not exceed this limit.

What connector types are available?

The standard connector type is BNC, but other connectors are available on request. Cable lengths range from 1 to 5 meters, with custom lengths possible.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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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

pH Electrode

Product Specifications

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