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.
Liquid Analysis Description
pH / ORP Sensor Key Features
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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
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Industrial water and wastewater treatment
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Chemical and petrochemical processes
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Power plant water systems
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Environmental water monitoring
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Food and beverage process water
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General industrial online pH and ORP measurement
Liquid Analysis Parameter
Technical Specifications – pH / ORP Sensor
| Parameter | pH Sensor | ORP Sensor |
|---|---|---|
| Measurement Range | 0 ~ 14 pH | -1999 mV ~ +1999 mV |
| Operating Temperature | 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 |
| Process Connection | 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
Tailored Sourcing & Customization: Getting You the Exact Product You Need
As your trusted supplier and sourcing partner, we bridge the gap between your custom requirements and China’s vast manufacturing capabilities.
Finding the right product in a massive supply chain can be challenging. That is where we step in.
As a curated industrial supplier, our core value is simple: we stand in your shoes to help you procure the most optimal products. Whether you are an EPC contractor needing specialized technical compliance, an OEM equipment manufacturer looking for custom branding, or an industrial distributor/trader seeking competitive edge, we customize and tailor products to fit your exact procurement needs.
How We Customize to Fit Your Procurement Needs
For EPC Contractors & Engineers: We custom-configure instruments and devices to match your precise datasheets—tailoring process connections, exotic materials, signal protocols, and managing third-party calibration and testing so you get project-ready solutions.
For OEM Equipment Manufacturers: We provide comprehensive OEM/ODM customization, including custom housing, labeling, branding (private labeling), and tailored technical specifications to seamlessly integrate with your machinery.
For Industrial Distributors & Traders: We offer flexible customization in packaging, product ranges, and technical parameters, helping you differentiate your portfolio and win more local bids.
Why Partner with Us for Custom Sourcing?
One-Stop Engineering Alignment: You don’t have to deal with multiple factories. We translate your technical requirements into precise manufacturer blueprints.
Strict Quality & Compliance Safeguard: We oversee the entire customization and production process in China, ensuring the final customized product meets your local standards and certifications.
Our Ultimate Value: We don’t just sell what’s on the shelf. We find, customize, and deliver the most suitable and cost-effective product for your unique application.
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.
Why Trust Instrava?
We select manufacturers from a neutral, impartial standpoint, always with your best interests in mind.
Our very existence depends on helping you source the products that are the perfect fit for your needs.
Based in China, we are able to conduct on-site inspections of production environments and product quality firsthand.
We help you avoid intermediaries posing as factories.
We facilitate smoother after-sales support, eliminating time zone issues and the delays often associated with dealing directly with factories.
Our multilingual team ensures effective communication.
For a trading startup, every interaction with a client is a precious opportunity—a sign that you are willing to place your trust in us and give us the chance to prove ourselves.
In the digital age, while information is easily accessible, misconceptions often cloud the trust between people.
Instrava relies entirely on trust; it is our core philosophy and the foundation of our existence in society. It is the fundamental basis for our long-term growth and our commitment to serving the community.
Please place your trust in us.
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