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.
Transmisores y sensores Descripción
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
Control medioambiental del agua
Food and beverage process water
General industrial online pH and ORP measurement
pH ORP Sensor Measurement Principle
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 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
Transmisores y sensores Parámetros
| Parámetro | pH Sensor | ORP Sensor |
|---|---|---|
| Intervalo de medida | 0 ~ 14 pH | -1999 mV ~ +1999 mV |
| Temperatura de funcionamiento | 0 ~ 80 ℃ | -10 ~ 100 ℃ |
| Presión de funcionamiento | ≤ 0.6 MPa | ≤ 0.8 MPa |
| Precisión de la medición | 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 |
| Clase de protección | IP65 | IP65 |
| Dimensiones del sensor | 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
Instrumentos fiables. Soluciones que se adaptan a su aplicación.
Instrava se centra en ofrecer soluciones industriales fiables a través de productos cuidadosamente seleccionados, optimización basada en aplicaciones y personalización flexible. Seleccionamos instrumentos probados de fabricantes de confianza para garantizar una calidad constante, optimizamos soluciones basadas en condiciones de trabajo reales para resolver retos prácticos y ofrecemos configuraciones a medida para satisfacer las necesidades de aplicaciones específicas.
Combinando la experiencia en selección con la comprensión de las aplicaciones, Instrava ayuda a sus clientes a reducir riesgos, mejorar la eficacia y obtener resultados fiables en entornos industriales complejos.
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What is the typical service life of a pH or ORP electrode in industrial applications?
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.
How often should the pH ORP sensor be calibrated?
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.
What factors most commonly reduce electrode lifespan on site?
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.
Can the pH ORP sensor be used directly in wastewater with suspended solids?
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.
Is the sensor compatible with different transmitters or controllers?
The pH ORP sensor is compatible with most standard industrial pH/ORP transmitters and analyzers that support glass electrode inputs and NTC temperature compensation.
How can stable measurement be ensured in long-term online operation?
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.
Basados en la coherencia, no en las reclamaciones
Estamos especializados en el análisis y la detección industriales, con una clara comprensión de los entornos operativos y los requisitos del mundo real.
Cada instrumento se evalúa en función de su rendimiento, estabilidad e idoneidad para la aplicación, no sólo de sus especificaciones o precios.
Trabajamos con fabricantes de confianza para garantizar un suministro estable, una calidad constante y una entrega fiable.
Nuestras recomendaciones se basan en el conocimiento de la aplicación, lo que ayuda a los clientes a evitar problemas comunes y lograr resultados fiables.
Instrava se ha creado para reducir la incertidumbre, de modo que cada decisión que tome sea más clara, segura y fiable.
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