ERUN’s online pH sensor water analyzer is a digital, CE-certified solution that delivers ±0.02 pH accuracy with RS485 Modbus output and IP68 protection. Built for continuous 24/7 monitoring in wastewater treatment, drinking water supply, and industrial process control, this analyzer eliminates the signal drift and frequent calibration issues common in traditional analog pH sensors.
Digital output at the sensor source prevents signal degradation over long cable runs. Unlike conventional analog pH probes that transmit raw millivolt signals—vulnerable to electromagnetic interference from pumps, VFDs, and industrial equipment—ERUN’s digital sensor converts measurement data inside the probe body.
This architecture delivers three core practical advantages:
Factor | Analog pH Sensor | ERUN Digital pH Sensor |
|---|---|---|
Signal Integrity | Degrades over cable length | Stable up to 10m+ |
Communication | Analog only (4-20mA) | RS485 Modbus RTU + 4-20mA |
Calibration | Frequent, on-site | Factory-calibrated, minimal maintenance |
The result is reliable and stable detection data in electrically noisy industrial environments where ordinary analog sensors fail to work steadily.
CE, RoHS, and ISO 9001 are the three essential credentials for global market access. Each certification corresponds to independent compliance standards, which are key verification items for global importers and engineering purchasers.
CE markingConforms to EU safety, health and environmental protection directives, including EMC Directive 2014/30/EU and LVD Directive 2014/35/EU for electrical equipment. Valid CE certification is a mandatory prerequisite to avoid customs detention in EU ports.
RoHS complianceRestricts hazardous substances such as lead, mercury and cadmium in electronic components. It is a mandatory standard for electronic products sold in the EU and has become a universal requirement for most global regulated markets.
ISO 9001 certificationVerifies that the entire manufacturing and quality control process complies with international standardized quality management systems, which is a basic procurement threshold for municipal projects and industrial bidding projects worldwide.
ERUN’s full line of online pH sensors has obtained all the above three authoritative certifications, meeting global export compliance requirements.
Monitoring accuracy, communication protocol and protection rating are the three core indicators to judge the adaptability of industrial pH sensors. The detailed technical parameters of ERUN online pH water analyzer are as follows:
Parameter | Specification |
|---|---|
pH Range | 0–14.00 pH |
Accuracy | ±0.02 pH |
Resolution | 0.01 pH |
Temperature Compensation | Automatic (0–60°C) |
Protection Rating | IP68 (submersible) |
Communication | RS485 Modbus RTU |
Output | 4-20mA (adjustable) |
Operating Pressure | 0–3 bar |
IP68 Full Submersible DesignThe sensor supports long-term continuous underwater operation, perfectly adapting to harsh scenarios such as wastewater sump tanks, aeration basins and surface water monitoring stations.
RS485 Modbus RTU Industrial ProtocolIt can be directly connected with PLC, DCS and SCADA industrial control systems without an additional transmitter, effectively reducing on-site wiring difficulty and overall system operation cost.
Real-time online pH monitoring is the core link to stabilize water treatment efficiency, standardize discharge and protect industrial equipment. pH value directly affects chemical dosing accuracy, microbial activity and equipment service life. The main application scenarios of ERUN online pH sensor are as follows:
Wastewater Treatment Plants: Real-time continuous monitoring of inlet water, aeration tank and effluent water to ensure discharge water quality complies with environmental protection standards.
Drinking Water Facilities: Multi-stage pH precise control to prevent pipeline corrosion and guarantee the full effectiveness of water disinfection.
Industrial Process Water: Applicable to cooling towers, boiler feed water and chemical production processes, avoiding pipeline scaling and equipment corrosion caused by pH value drift.
Aquaculture & Surface Water Monitoring: 24/7 real-time water quality monitoring to protect aquatic biological health and meet environmental monitoring compliance requirements.
Equipped with automatic temperature compensation function, the sensor can eliminate the detection deviation caused by daily and seasonal temperature changes, ensuring long-term accurate and stable measurement data.
Q1: Does the online pH sensor require frequent calibration?A1: No. The sensor is factory pre-calibrated with built-in standard calibration parameters. On-site users only need quarterly routine verification, without the weekly frequent calibration required by traditional analog probes, greatly reducing maintenance workload.
Q2: Can it be integrated with existing PLC systems?A2: Yes. The standard RS485 Modbus RTU protocol is widely compatible with mainstream industrial automation equipment. The sensor can be directly connected to PLC and DCS systems without additional supporting transmitters.
Q3: What is the service life of the industrial pH sensor?A3: The industrial high-strength electrode is designed for long-term online monitoring with no need for manual electrolyte replacement. The actual service life is affected by water quality and water temperature, but its overall stability and durability are far better than conventional pH probes.
Q4: Is the sensor suitable for outdoor installation?A4: Yes. The sensor adopts IP68 waterproof and dustproof design, and the matched controller meets industrial-grade environmental adaptability standards, supporting long-term stable outdoor continuous operation.
As a professional direct manufacturer with complete CE, RoHS and ISO 9001 certifications, ERUN provides full compliance documents and cost-effective factory direct prices.
All ERUN online pH water analyzers are independently produced and tested in-house, bringing core advantages for global purchasers:
Complete Certified Documents: Complete CE, RoHS, ISO 9001 certification files are provided to support project bidding and global customs clearance.
Strict Factory Calibration: Every single sensor is fully calibrated and strictly tested before delivery to ensure consistent product accuracy and stability.
Customized Support: Customizable cable length, process connection mode and signal output scheme to adapt to diverse on-site project requirements.
Professional Technical Service: Direct factory engineering support for system integration, on-site calibration and equipment troubleshooting.
For global importers, engineering contractors and distributors, ERUN provides standardized, compliant and high-performance online pH monitoring equipment, supporting stable and reliable operation of various water quality monitoring projects.
ERUN — precision water quality instruments, certified for global markets.
