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Industrial Digital pH / ORP Sensor for Continuous Process Control
The Instrava pH / ORP sensor is designed for continuous, reliable measurement of acidity, alkalinity, and oxidation-reduction potential in industrial and environmental applications.
Built for long-term stability, the sensor integrates high-accuracy electrodes with digital RS485 (Modbus RTU) communication, ensuring strong anti-interference performance and seamless integration with PLC, DCS, and water quality analyzers.
It is widely used in water treatment, chemical processing, power generation, food & beverage, and environmental monitoring, where stable pH and ORP control is critical to process safety and efficiency.
Transmitters & Sensors Description
pH / ORP Sensor Key Features
High-precision pH & ORP measurement
Accurate monitoring across a wide pH and ORP range for demanding industrial processes.Digital RS485 Modbus RTU output
Stable long-distance transmission with no signal drift, ideal for harsh electrical environments.Industrial-grade electrode design
Fast response, strong resistance to contamination, and long service life.Low maintenance with optional automatic cleaning
Reduces manual intervention in wastewater and chemical applications.Wide compatibility
Fully compatible with Instrava multifunction water quality analyzers and third-party control systems.
pH/ORP Sensor Applications
Industrial water and wastewater treatment
Chemical and petrochemical processes
Power plant water systems
Environmental water monitoring
Food and beverage process water
General industrial online pH and ORP measurement
pH ORP Sensor Measurement Principle
pH Measurement
The pH sensor measures hydrogen ion activity using a glass electrode and reference electrode.
The potential difference generated between the electrodes varies proportionally with the pH value of the solution.
ORP Measurement
ORP measurement is based on detecting the oxidation or reduction potential of the solution.
The sensor outputs a millivolt (mV) signal representing the solution’s ability to gain or lose electrons.
Both signals are digitally processed and transmitted via RS485 for stable and accurate readings.
pH ORP Sensor Installation & Integration
Immersion, pipeline, or flow-cell installation
Plug-and-play with Instrava water quality analyzers
Compatible with PLC, SCADA, and DCS systems
Suitable for continuous online monitoring
Transmitters & Sensors Parameter
Technical Specifications – pH / ORP Sensor
| Parámetro | pH Sensor | ORP Sensor |
|---|---|---|
| Measurement Range | 0 ~ 14 pH | -1999 mV ~ +1999 mV |
| Temperatura de funcionamiento | 0 ~ 80 ℃ | -10 ~ 100 ℃ |
| Operating Pressure | ≤ 0.6 MPa | ≤ 0.8 MPa |
| Measurement Accuracy | pH: ±0.05 pH Temperature: ±0.5 ℃ | ORP: ±1 mV Temperature: ±0.5 ℃ |
| Temperature Sensor | NTC 2.252K | NTC 2.252K |
| Wetted Material | ABS, Glass | ABS, Glass |
| Protection Class | IP65 | IP65 |
| Sensor Dimensions | Ø26.7 × 160 mm Ø12 × 120 mm | Ø26.7 × 160 mm Ø12 × 120 mm |
| Conexión a proceso | 3/4″ NPT, PG13.5 | 3/4″ NPT, PG13.5 |
| Signal Cable Length | 5 m standard Up to 20 m customizable | 5 m standard Up to 20 m customizable |
Instrava OEM/ODM
Instrava Customization & Support
Electrode material selection for specific chemical environments
Cable length and mounting accessories customization
Modbus register optimization for system integration
Calibration guidance and long-term maintenance support
Instrava focuses on stable field performance, not just laboratory accuracy.
Recomendaciones de productos relacionados
Under normal industrial water conditions, the typical service life of a pH or ORP electrode is 12–18 months. Actual lifespan depends on water quality, temperature, chemical composition, and maintenance practices.
For stable industrial water, calibration is usually recommended once per month. In harsh or fluctuating process conditions, more frequent calibration (every 1–2 weeks) helps maintain measurement accuracy.
Electrode lifespan can be shortened by high temperature, strong acids or alkalis, oil contamination, solids abrasion, and improper cleaning. Regular inspection and correct cleaning procedures significantly extend sensor life.
Yes. The sensor is suitable for wastewater applications; however, regular cleaning is recommended to prevent fouling on the glass membrane, which may affect response time and accuracy.
The pH ORP sensor is compatible with most standard industrial pH/ORP transmitters and analyzers that support glass electrode inputs and NTC temperature compensation.
Stable long-term operation is achieved through proper installation, correct calibration, regular cleaning, and suitable electrode selection based on process conditions. Using compatible transmitters with temperature compensation further improves measurement stability.
Por qué elegir Instrava
Al elegir Instrava, obtiene un socio con un profundo conocimiento de las aplicaciones industriales y la experiencia necesaria para hacer frente a los retos operativos actuales.
Nuestro papel va más allá de los productos: respaldamos su éxito con soluciones fiables y un compromiso a largo plazo.
Innovación impulsada por la ingeniería
La innovación en Instrava se guía por necesidades industriales reales. Perfeccionamos continuamente nuestras tecnologías para hacer frente a los cambiantes retos operativos, garantizando un rendimiento práctico y fiable en entornos exigentes.
Personalización específica de la aplicación
Ofrecemos personalización a nivel de ingeniería para adaptarnos a las condiciones específicas del proceso. Desde el rango de medición y los materiales hasta las señales de salida y las opciones de instalación, nuestras soluciones están configuradas para adaptarse a aplicaciones reales.
Calidad y fiabilidad demostradas
La calidad y la fiabilidad son fundamentales en todos los productos Instrava. Fabricados bajo estrictos controles de calidad y sometidos a pruebas exhaustivas, nuestros instrumentos ofrecen un rendimiento preciso, estable y a largo plazo.
Capacidad global con apoyo local
Instrava combina la experiencia mundial en ingeniería con una asistencia local receptiva, lo que garantiza que nuestros socios se beneficien de una tecnología alineada internacionalmente y de un servicio regional puntual.
Amplia cartera de productos
Nuestra amplia cartera de instrumentos de medición y control nos permite dar respuesta a una amplia gama de necesidades industriales, proporcionando soluciones integradas a partir de una fuente única y fiable.
Asistencia técnica orientada a los socios
Trabajamos en estrecha colaboración con nuestros socios, desde el asesoramiento técnico hasta la asistencia posventa. Nos centramos en ofrecer soluciones que generen un valor duradero y contribuyan al éxito operativo a largo plazo.
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