Online pH Sensor | Industrial Inline pH Probe with RS485 Modbus & 4–20 mA
A rugged industrial online pH sensor for continuous water and process monitoring. Features RS485 Modbus RTU and 4–20 mA outputs, fast response, long electrode life, and IP68 protection for pipelines, tanks, and harsh environments.
This inline pH probe is designed for reliable, real-time pH measurement across environmental and industrial applications. Using a high-stability glass electrode system with automatic temperature compensation, it delivers accurate readings with strong immunity to electrical interference.
The patented reference system releases electrolyte extremely slowly through a microporous salt bridge under positive pressure, significantly extending electrode service life and stability compared to conventional probes. Dual high-impedance differential amplification ensures fast response and robust performance in noisy industrial settings.
With RS485 (Modbus RTU) and 4–20 mA outputs, the sensor integrates seamlessly with PLCs, DCS, SCADA, data loggers, HMIs, and IoT gateways. A standard 3/4″ NPT thread simplifies installation in pipes, tanks, and flow cells.
Key Applications
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Environmental water quality monitoring
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Wastewater and effluent treatment
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Chemical processing and reactions
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Acid / alkali / salt solution monitoring
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Industrial process control
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Aquaculture and water systems
Compliance & Design Considerations
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Inline glass-electrode pH measurement with long-life reference
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RS485 Modbus RTU and 4–20 mA industrial interfaces
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IP68 ingress protection for submerged and wet locations
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Automatic temperature compensation (Pt1000)
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Environmentally safe construction with no hazardous chemicals