AL4170 Ozone Water Quality Sensor: Online Monitoring Solution for Industrial Water Disinfection Processes

In industrial water treatment and municipal supply projects, real-time and accurate dissolved ozone concentration data is a critical indicator for disinfection validation, process optimization, and compliance. The Nexisense AL4170 ozone water quality sensor, based on the membrane-covered constant voltage three-electrode method, is specifically designed to meet the practical needs of system integrators, engineering firms, and project managers. It provides a plug-and-play communication interface, low-maintenance design, and standardized protocol support. The sensor can be directly immersed for in-situ measurement, and when combined with the RS485 Modbus-RTU interface and WQS-SUITE software, it significantly simplifies field deployment and system integration, helping to build stable and reliable disinfection monitoring systems.

AL4170 Ozone Water Quality Sensor Product Details

The Nexisense AL4170 ozone water quality sensor utilizes a membrane-covered constant voltage three-electrode measurement system, incorporating a reference electrode to ensure long-term stability of results. A built-in NTC sensor enables automatic temperature compensation, effectively eliminating the impact of temperature fluctuations on the measured values. Constructed from sanitary-grade, non-polluting materials, the sensor is suitable for applications requiring high water cleanliness.

The sensor captures reaction current in real-time with rapid response, and measurements are unaffected by the turbidity or color of the water sample, allowing for direct use in complex water environments. With its RS485 communication interface and standard MODBUS protocol, it integrates seamlessly with existing PLCs, RTUs, or central control systems. The complimentary WQS-SUITE software facilitates parameter setting, calibration, real-time measurement display, and fault diagnosis, further reducing engineering commissioning difficulty. The hardware design includes 3KV voltage isolation and reverse connection protection to ensure strong anti-interference capabilities and electromagnetic compatibility in harsh industrial sites.

Product Specifications

Core Technical Advantages

The AL4170 utilizes a membrane-covered constant voltage three-electrode system, which significantly enhances anti-interference performance, ensuring stable measurements in complex water conditions. The introduction of a reference electrode further suppresses electrode drift, and when coupled with built-in NTC automatic temperature compensation, high-precision output is achieved across the entire temperature range. It is factory-calibrated using the iodometric method and includes built-in parameters, supporting quick restoration to factory status to reduce maintenance frequency.

The design fully considers engineering integration: the 3KV voltage-isolated power supply and opto-isolated communication interface together enhance robustness, while interface protection prevents damage from wiring errors. The PVC material balances sanitary requirements with corrosion resistance, and the IP68 rating supports long-term immersion in damp or outdoor environments without additional protection.

Typical Application Scenarios

• Municipal Water & Secondary Supply: Monitor residual ozone to ensure disinfection effectiveness while avoiding the risk of by-products from over-ozonation.

• Pipe Network Terminals: Compact size and RS485 interface allow quick integration into remote monitoring networks for closed-loop water safety management.

• Medical Disinfection & Swimming Pools: A detection limit of 0.01 mg/L enables precise tracking of low-concentration changes for fine process control.

• Industrial Water & Wastewater: Unaffected by turbidity or color, making it ideal for high-suspended solids or dyed wastewater, uploading data directly to central control systems via Modbus.

Frequently Asked Questions (FAQ)

1. Can the AL4170 maintain accuracy in turbid or colored wastewater?
   The membrane-covered constant voltage three-electrode design ensures measurements are independent of turbidity or color. The reference electrode and NTC compensation maintain data stability in complex environments like industrial cooling or wastewater effluent.

2. How does the sensor integrate with existing PLC or SCADA systems?
   It provides an isolated RS485 interface with standard MODBUS-RTU protocol. It can be connected directly to PLCs or RTUs. The WQS-SUITE software assists in address configuration and communication testing without needing extra converters.

3. How are calibration and maintenance handled to control costs?
   Factory calibration parameters can be restored via software at any time, and the membrane cap is field-replaceable. The IP68 structure reduces cleaning frequency, and diagnostics provide early warnings, keeping maintenance lower than traditional spectrophotometric instruments.

4. What is the value of the response time for real-time process control?
   With a T90 ≤ 120s, the sensor reflects ozone concentration changes quickly, meeting the dynamic adjustment needs of dosing control in water plants or disinfection stages in wastewater treatment, avoiding compliance risks due to data lag.

5. What are the advantages of the power and interface protection design?
   The 7-30VDC range is compatible with various field power sources. The 3KV isolation and reverse polarity protection effectively handle power fluctuations and wiring mistakes, reducing the probability of equipment damage during commissioning.

6. How does the WQS-SUITE software facilitate project delivery?
   The software supports batch configuration, real-time measurement display, history data export, and diagnostics. One-click restoration of factory calibration allows engineers to complete device acceptance and system debugging rapidly on-site.

Summary

The Nexisense AL4170 ozone water quality sensor, with its membrane-covered three-electrode technology, standardized communication, and low-maintenance design, provides a reliable monitoring hardware solution for various water disinfection scenarios. It effectively improves data collection efficiency and reduces Total Cost of Ownership (TCO) in municipal and industrial projects. For detailed technical parameters, integration guidance, or trial sample support, please contact the Nexisense engineering team.