NBL-WQ-ORP-4 Online ORP Sensor | Industrial-grade ORP Electrode | High Stability Online ORP Monitoring

NiuBoL NBL-WQ-ORP online ORP sensor adopts patented high-stability ORP electrode and dual high-impedance differential amplification circuit design. Specially developed for industrial process control, environmental water quality monitoring and chemical reaction processes, it provides long-term stable and highly anti-interference real-time ORP measurement solutions to help system integrators and engineering contractors achieve reliable oxidation-reduction potential monitoring.

Stable Control of Oxidation-Reduction Potential to Ensure Industrial Process Safety and Water Treatment Efficiency

In sewage treatment, chemical synthesis, acid-base neutralization and industrial circulating water systems, ORP value fluctuations often lead to reaction loss of control, low treatment efficiency or equipment corrosion risks. NiuBoL NBL-WQ-ORP online ORP sensor effectively solves problems of traditional electrodes such as short lifespan, easy drift, weak anti-interference ability and complex integration through patented reference electrode system and industrial-grade design, ensuring long-term high-precision operation.

Three Core Advantages

• Ultra-long Life and High Stability: Patented ORP electrode with reference solution slowly seeping out under 1Bar pressure. Positive seepage lasts more than 20 months, significantly extending electrode life.

• Strong Anti-interference and Fast Response: Dual high-impedance differential amplifier, T90 response time <30s, strong anti-interference ability and stable output.

• Easy Integration with Industrial Protocols: Native support for RS-485 (Modbus RTU) and 4-20mA output, easy access to PLC, DCS, SCADA and IoT systems.

NBL-WQ-ORP Online ORP Sensor Overview

NiuBoL NBL-WQ-ORP online ORP sensor is a universal oxidation-reduction potential monitoring device developed by NiuBoL for industrial sites. It adopts platinum electrode measurement principle and is suitable for online monitoring of environmental water quality, acid-base salt solutions and various chemical reaction processes.

The product offers two material versions: NBL-WQ-ORP-4A (POM+ABS) and NBL-WQ-ORP-4S (POM+316L), meeting different corrosive environment requirements. IP68 high protection rating combined with 3/4 NPT pipe thread installation method makes it suitable for both submersible installation and pipeline/tank integration. The built-in high-stability circuit design ensures reliable and continuous ORP data support in complex industrial environments.

NBL-WQ-ORP Online ORP Sensor Key Advantages

1. Patented Electrode System
       Adopts patented ORP electrode. Internal reference solution seeps out extremely slowly through the microporous salt bridge under at least 100KPa pressure. Positive seepage time exceeds 20 months, greatly improving reference system stability and making electrode life far longer than ordinary industrial electrodes.

2. Circuit Anti-interference Design
       Built-in dual high-impedance differential amplifier effectively suppresses electromagnetic interference in industrial sites. Signal transmission is stable with fast response (T90＜30s), especially suitable for industrial occasions with frequency converters or strong electromagnetic environments.

3. Rugged Protection and Material Selection
       IP68 protection rating allows long-term immersion. Two housing materials available: 4A type uses POM+ABS (economical and practical); 4S type uses POM+316L stainless steel (suitable for higher corrosive media). M16-5 core waterproof connector ensures reliable electrical connection.

4. Convenient Installation and Integration
       3/4 NPT standard pipe thread for easy installation. Open Modbus RTU protocol allows system integrators to quickly connect to various control platforms, significantly shortening project implementation cycle.

5. Maintenance Friendly
       Supports one-point calibration with simple operation. Detailed standard solution preparation methods and electrode maintenance guidelines are provided to reduce on-site operation difficulty.

NBL-WQ-ORP-4 Online ORP Sensor Technical Specifications

Applications

• Sewage treatment and environmental monitoring: Real-time monitoring of ORP values in aeration tanks, anaerobic tanks and effluent to optimize biochemical treatment processes.

• Chemical and pharmaceutical process control: Used for oxidation-reduction reaction process monitoring to ensure stable reaction conditions and improve product yield and safety.

• Industrial circulating cooling water systems: Monitor oxidation-reduction potential of cooling water to prevent corrosion and scaling, guiding chemical dosing control.

• Electroplating and surface treatment: Precisely control ORP value of plating solution to ensure stable electroplating quality.

• Acid-base neutralization and waste liquid treatment: As an oxidation-reduction indicator parameter to assist automatic dosing systems for precise control.

Wiring & Installation

Installation Notes: The sensor must not be installed upside down or horizontally. It should be installed at least tilted more than 15° to ensure normal seepage of reference solution.

Electrical Connection (5-core shielded cable):

• Red wire → Power positive (12～24VDC)

• Black wire → Ground (GND)

• Blue wire → 485A

• White wire → 485B

• Yellow wire → Current output (optional 4-20mA)

FAQ

Q1. How many models does the NBL-WQ-ORP series have? What is the difference?

Divided into 4A (POM+ABS) and 4S (POM+316L). The 4S type stainless steel material is more suitable for highly corrosive media.

Q2. What output methods does the sensor support?

Supports RS-485 (Modbus RTU protocol) and 4-20mA current output, convenient for access to different control systems.

Q3. How long is the service life of the ORP electrode?

Adopts patented reference system with positive seepage lasting more than 20 months. Actual service life is far longer than ordinary industrial electrodes, depending on medium conditions.

Q4. How to perform on-site calibration?

Adopts one-point calibration method. Place the sensor in 86mV, 256mV or -40mV standard solution and calibrate through upper computer or controller after stabilization.

Q5. What are the installation angle requirements?

Must be installed at an angle greater than 15°. Must not be installed upside down or horizontally to ensure normal operation of reference solution.

Q6. How to maintain the electrode daily?

Rinse with distilled water and dry after measurement. Soak in 3mol/L potassium chloride solution when not in use. Avoid long-term placement in distilled water or protein solutions.

Q7. Can it be used in seawater or high-salinity environments?

IP68 protection supports long-term immersion. For seawater and other high-salinity environments, 4S type is recommended and waterproofing of connectors should be strengthened.

Q8. What is the product warranty period?

One year warranty from the date of sale. Failures caused by improper use or human damage are not covered.

Summary

NiuBoL NBL-WQ-ORP-4 online ORP sensor provides a highly reliable ORP monitoring tool for various water treatment, chemical and environmental protection projects with its patented stable electrode, strong anti-interference circuit and industrial-grade protection design. It not only helps engineering teams accurately control oxidation-reduction processes but also effectively reduces maintenance costs and improves overall system operation efficiency.

Need selection guidance, Modbus protocol address table, standard solution preparation video or project reference cases? Feel free to contact the NiuBoL technical support team. We will provide you with professional and complete industrial water quality monitoring solutions.

NBL-WQ-ORP-4 Online Oxidation-Reduction Potential ORP Sensor Data Sheet

NBL-WQ-ORP-4A Online Oxidation-Reduction Potential ORP Sensor.pdf

NBL-WQ-ORP-4S Online Oxidation-Reduction Potential ORP Sensor.pdf