NBL-WQ-KA-4 Online Potassium Ion Sensor | PVC Membrane Potassium Ion Selective Electrode | Potassium Ion Monitoring

NiuBoL NBL-WQ-KA-4 online potassium ion sensor adopts patented PVC membrane potassium ion selective electrode with automatic temperature compensation. It is specially designed for industrial water treatment, agricultural irrigation, environmental monitoring and process control, providing high-stability, high-precision and low-maintenance real-time online potassium ion measurement solutions to help system integrators and engineering contractors achieve reliable ion concentration monitoring.

Precise Monitoring of Potassium Ion Concentration in Water to Help Optimize Water Treatment Processes and Agricultural Precision Management

Traditional potassium ion detection often faces problems such as short electrode life, serious drift, complex installation and maintenance, and difficult integration. NiuBoL NBL-WQ-KA-4 split-type online potassium ion sensor effectively solves these pain points through patented reference system and industrial-grade design, maintaining long-term stable output even in complex water quality environments, providing trustworthy potassium ion data support for municipal, industrial and agricultural water systems.

Three Core Advantages

• Patented Electrode High Stability: Internal reference solution slowly seeps out under 1Bar pressure, stable reference system, significantly extended electrode service life.

• High Precision with Temperature Compensation: Automatic Pt1000 temperature compensation, two-point calibration method, ensuring accurate and reliable measurement.

• Strong Compatibility and Easy Integration: Supports RS-485 (Modbus RTU protocol) and optional 4-20mA output, fast access to PLC, DCS, SCADA and IoT platforms.

NBL-WQ-KA-4 Online Potassium Ion Sensor Overview

NiuBoL NBL-WQ-KA-4 online potassium ion sensor is a professional ion selective electrode monitoring device launched by NiuBoL. It is based on PVC membrane potassium ion sensitive membrane and can achieve fast and accurate measurement of potassium ion concentration in water.

The product is divided into two material versions: NBL-WQ-KA-4A (POM+ABS) and NBL-WQ-KA-4S (POM+316L), adapting to different corrosive media requirements. IP68 protection rating, 3/4 NPT pipe thread installation method and open communication protocol make it widely suitable for various online monitoring projects. The sensor has automatic temperature compensation function, which can effectively reduce the impact of temperature changes on measurement results and meet the requirements for data continuity and reliability in industrial sites.

NBL-WQ-KA-4 Online Potassium Ion Sensor Key Advantages

1. Patented Ion Selective Electrode
       Adopts patented potassium ion electrode. The internal reference solution seeps out extremely slowly through the microporous salt bridge under ≥100KPa pressure, building a highly stable reference system. Electrode life is significantly better than ordinary industrial electrodes, reducing costs and downtime caused by frequent replacement.

2. Precise Measurement and Compensation
       Provides two range options: 0～100 mg/L and 0～1000 mg/L. Resolution up to 0.01 mg/L (low range), supports automatic Pt1000 temperature compensation, accuracy ±10% of reading or ±1 mg/L, temperature accuracy ±0.5℃, response time T90＜60s, meeting most engineering precision requirements.

3. Industrial-grade Protection Design
       IP68 high protection rating supports long-term immersion use. 4A type is economical and practical, 4S type adopts 316L stainless steel, suitable for more corrosive environments. The sensor has undergone 72-hour aging and stability testing before delivery to ensure reliability.

4. Convenient Installation and Integration
       Standard 3/4 NPT pipe thread for easy submersible, pipeline or tank installation. Open Modbus RTU protocol allows system integrators to quickly connect to PLC, DCS, industrial touch screens and other equipment, reducing project implementation difficulty.

5. Economical Maintenance
       Supports two-point calibration (zero + slope) with matching standard calibration solutions. Daily maintenance is simple, with clear electrode activation and cleaning methods, significantly reducing on-site operation and maintenance workload.

NBL-WQ-KA-4 Online Potassium Ion Sensor Technical Specifications

Applications

• Municipal sewage treatment and reclaimed water monitoring: Real-time tracking of potassium ion concentration changes to optimize biochemical treatment processes.

• Agricultural irrigation and smart agriculture: Monitor potassium ion content in irrigation water or nutrient solutions to achieve precise fertilization guidance.

• Industrial circulating water and boiler water treatment: Control potassium ion levels in cooling water and process water to prevent scaling and corrosion.

• Environmental water quality online monitoring stations: Used for background monitoring of potassium ions in rivers, lakes and groundwater, supporting environmental supervision platforms.

• Food, pharmaceutical and chemical processes: Provide reliable data support in production links that require strict control of ion balance.

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 and stable electrode operation.

Electrical Connection (5-core twisted shielded cable):

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

• Black wire → Ground (GND)

• Blue wire → 485A

• Green wire → 485B

• Yellow wire → Current output (optional, can be left floating if not used)

FAQ

Q1. What are the two models of NBL-WQ-KA-4? What is the main difference?

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

Q2. What communication protocols and outputs does the sensor support?

Standard RS-485 Modbus RTU protocol, supports optional 4-20mA current output, compatible with mainstream PLC, DCS and IoT systems.

Q3. What is the service life of the potassium ion electrode?

Adopts patented reference solution slow seepage design with high stability. Electrode life is significantly longer than ordinary industrial electrodes, depending on the use environment and maintenance.

Q4. What is the calibration method and frequency recommendation?

Supports two-point calibration (zero + slope). Factory calibrated. It is not recommended to calibrate frequently unless necessary. Regular verification is recommended when water quality changes significantly.

Q5. What are the special requirements for installation angle?

Must be installed at an angle greater than 15°. Must not be installed upside down or horizontally. This is the key to ensuring normal operation of the reference system.

Q6. How to activate and maintain the electrode daily?

New electrode needs to be soaked in tap water for 24 hours for activation; store dry and with protection cap when not in use for a long time; clean with deionized water daily and avoid contact with silicone grease.

Q7. What is the working pH and temperature range?

Recommended working temperature 0～40℃, pH value 4～10. Best measurement performance is obtained within this range.

Q8. What is the product warranty policy?

One year warranty for the whole machine from the date of sale. The electrode, as a consumable, has a six-month warranty. Damage caused by improper use is not covered.

Summary

NiuBoL NBL-WQ-KA-4 online potassium ion sensor provides a professional and reliable online detection tool for industrial water treatment, agricultural precision management and environmental monitoring projects with its patented stable electrode, automatic temperature compensation, high protection design and excellent communication integration capabilities. It helps engineering teams accurately master key ion parameters, reduce maintenance costs and improve system intelligence levels.

Need range selection advice, Modbus register address table, calibration solution usage guidance or successful application cases? Feel free to contact the NiuBoL technical team. We will provide you with comprehensive and professional water quality ion monitoring solutions.

NBL-WQ-KA-4 Online Potassium ion Sensor Data Sheet

NBL-WQ-KA-4 Online Potassium ion Sensor.pdf