Water Quality Analyzer EUV-408 Multi-Parameter Monitoring

The JW-EUV-408(K39) Multi-Parameter Water Quality Analyzer is designed for continuous online monitoring of multiple water-quality indicators from a single submerged instrument.

Unlike conventional multi-probe systems that use separate electrochemical sensors for each parameter, the EUV-408 uses full-spectrum absorption simulation technology to monitor a broader group of water-quality indicators without chemical reagents.

Available measurements include:

• COD
• TOC
• BOD
• Total Phosphorus
• Total Nitrogen
• NHN
• Nitrate
• Nitrite
• Turbidity
• CODMn
• Color
• Temperature

With RS485 Modbus RTU, IP68 protection, a 316L stainless steel housing, and immersion installation, it can be integrated into industrial wastewater, municipal water, environmental monitoring and automated water-quality monitoring systems.

1. Product Description

JW-EUV-408(K39) is an integrated multi-parameter water quality analyzer developed for applications where several pollution indicators need to be monitored continuously.

Traditional online analysis of COD, BOD, TOC, nitrogen and phosphorus often involves multiple instruments or reagent-based analyzers.

The EUV-408 takes a different approach.

It uses full-spectrum absorption simulation to derive multiple water-quality parameters from optical spectral characteristics.

This makes it especially suitable for monitoring systems that require:

• Continuous online measurement
• Multiple parameters at one monitoring point
• Digital data transmission
• Reduced reagent handling
• Submerged field deployment
• Integration with PLC, RTU or IoT systems

Because the analyzer does not require chemical reagents during normal measurement, it can simplify field installation and reduce some of the operational work associated with traditional wet-chemistry analyzers.

2. What Makes the EUV-408 Different?

The EUV-408 should not be viewed simply as another multiparameter probe.

Its positioning is closer to a reagent-free optical water-quality analyzer.

Instead of combining several physically separate probes for pH, DO, ORP and conductivity, it is designed around spectral analysis for pollution-related water parameters.

This makes it particularly relevant when projects focus on:

• Organic pollution indicators
• Nutrient-related parameters
• Wastewater effluent quality
• Industrial discharge monitoring
• River and lake pollution monitoring
• Smart environmental monitoring stations

For broader water-quality projects involving electrochemical parameters such as pH, ORP or dissolved oxygen, users can also explore the JW-IoT Water Quality Sensor category.

3. Reagent-Free Full-Spectrum Measurement

One of the main features of the EUV-408 is its full-spectrum absorption simulation technology.

In this type of measurement approach, the analyzer observes optical absorption characteristics across a spectral range and uses these signals to estimate multiple water-quality indicators.

For field monitoring, this has several practical advantages.

No Chemical Reagents

The analyzer does not require chemical reagents during normal online measurement.

This helps reduce:

• Reagent storage
• Chemical handling
• Waste reagent disposal
• Routine reagent replenishment
• Some maintenance associated with traditional wet-chemistry analyzers

For remote monitoring stations, reducing reagent dependence can be especially valuable where frequent site visits are difficult.

4. Supported Water Quality Parameters

COD

Chemical Oxygen Demand is widely used as an indicator of organic pollution in wastewater and surface-water monitoring.

Range:
0–500 mg/L equiv. KHP

Accuracy:
±5% F.S.

Resolution:
0.1 mg/L

TOC

Total Organic Carbon provides another indicator of organic content in water.

Range:
0–350 mg/L

Accuracy:
±5% F.S.

Resolution:
0.1 mg/L

BOD

The EUV-408 provides a BOD-related measurement output based on its optical analysis model.

Range:
0–350 mg/L

Accuracy:
±5% F.S.

Resolution:
0.1 mg/L

Total Phosphorus

Range:
0–15 mg/L

Accuracy:
±5% F.S.

Resolution:
0.1 mg/L

Total Nitrogen

Range:
0–20 mg/L

Accuracy:
±5% F.S.

Resolution:
0.1 mg/L

NHN

Range:
0–60 mg/L

Accuracy:
±5% F.S.

Resolution:
0.1 mg/L

Nitrate

Range:
0–15 mg/L

Accuracy:
±5% F.S.

Resolution:
0.01 mg/L

For projects requiring a dedicated nitrate measurement point, JW-IoT also provides a Nitrate Nitrogen Sensor for Water Quality and Wastewater Applications.

Nitrite

Range:
0–10 mg/L

Accuracy:
±5% F.S.

Resolution:
0.01 mg/L

Turbidity

Range:
0–400 NTU

Accuracy:
±5% F.S.

Resolution:
0.1 NTU

For projects requiring a dedicated turbidity measurement channel, see the Online Turbidity Sensor for Water Quality Monitoring.

CODMn

Range:
0–100 mg/L

Accuracy:
±5% F.S.

Resolution:
0.1 mg/L

Color

Range:
0–500 Hazen

Accuracy:
±5% F.S.

Resolution:
0.1 Hazen

Temperature

Range:
0–50°C

The published product page lists the above parameter ranges and specifications for the EUV-408.

5. Technical Specifications

6. RS485 Modbus RTU Integration

The EUV-408 provides RS485 Modbus RTU digital communication, allowing the analyzer to be integrated into a larger monitoring network.

Possible connected equipment includes:

• PLC
• RTU
• Industrial controller
• Data logger
• IoT gateway
• Remote telemetry unit
• SCADA system
• Water-quality monitoring platform

A typical system architecture may be:

EUV-408 Analyzer
↓
RS485 / Modbus RTU
↓
Data Logger / RTU / PLC
↓
4G / LoRaWAN / Ethernet / Other Communication
↓
Cloud Platform / SCADA / Customer Server

The communication equipment should be selected according to the actual project.

The analyzer itself provides RS485 Modbus output; wireless or remote telemetry normally requires an additional compatible communication device.

7. Industrial Wastewater Monitoring

Industrial wastewater is one of the strongest application scenarios for this analyzer.

Manufacturing plants may need to observe changes in:

• COD
• TOC
• Nitrogen compounds
• Phosphorus-related indicators
• Turbidity
• Color
• Temperature

Continuous online monitoring can help operators identify changing wastewater conditions before or after treatment stages.

The EUV-408 can be installed as part of a broader Smart Water & Environmental Monitoring system.

For manufacturing facilities specifically, the analyzer can also be integrated with industrial wastewater monitoring solutions that combine sensing, data acquisition, telemetry and platform visualization.

8. Municipal Sewage and Effluent Monitoring

Municipal wastewater treatment plants may need continuous data at:

• Influent points
• Treatment process stages
• Secondary treatment sections
• Effluent points
• Reclaimed-water systems

A multi-parameter analyzer can reduce the number of separate instruments required when several optical water-quality indicators are needed at one location.

The EUV-408 is particularly useful where COD, BOD-related values, TOC, TN, TP and turbidity need to be tracked together.

9. River, Lake and Surface-Water Monitoring

Environmental monitoring stations may use multi-parameter water analyzers to identify changes in water quality over time.

Typical applications include:

• Rivers
• Lakes
• Reservoirs
• Environmental monitoring stations
• Pollution-source monitoring
• Surface-water observation networks

The IP68 enclosure and immersion installation design allow the analyzer to operate as a submerged measurement instrument.

For larger monitoring projects, it can be combined with telemetry, power supply and a remote platform to create a complete online water-quality station.

10. Reclaimed Water and Discharge Monitoring

Reclaimed-water systems and discharge points often require continuous monitoring of treatment performance.

Parameters such as COD, turbidity, nitrogen and phosphorus indicators can help operators understand whether water quality is changing.

The EUV-408 can provide multiple measurement outputs through one RS485 communication interface, simplifying integration with existing process-control or monitoring equipment.

11. Laboratory and Field Applications

The current product page also lists laboratory water-quality testing among the available application scenarios.

However, the EUV-408 is fundamentally designed around online and immersion monitoring.

For laboratory use, the installation arrangement and calibration procedure should be configured according to the actual testing setup.

It should not automatically be treated as a replacement for every standardized laboratory analytical method.

12. Why Choose a Reagent-Free Analyzer?

Reagent-free measurement is especially useful when the project prioritizes continuous monitoring rather than manual chemical analysis.

Potential operational advantages include:

• No routine reagent consumption during measurement
• Reduced chemical handling
• Faster continuous data acquisition
• Easier remote deployment
• Simpler station design
• Lower field-maintenance workload
• Easier digital system integration

However, users should also distinguish between online optical estimation and laboratory reference analysis.

For regulatory or contractual reporting, the required analytical method should always be confirmed according to the project standard or local regulation.

13. EUV-408 vs Conventional Multi-Probe Sensors

The EUV-408 serves a different measurement purpose from a traditional multi-probe water-quality sonde.

EUV-408

Best suited to applications focused on:

• COD
• BOD
• TOC
• TN
• TP
• Nitrate
• Nitrite
• Turbidity
• Color
• Pollution-related indicators

Conventional Multiparameter Probe

Better suited when the project needs parameters such as:

• pH
• ORP
• Dissolved oxygen
• Conductivity
• Salinity
• Ammonium

For these applications, users can explore the wider JW-IoT Water Quality Sensor range.

This distinction is important when selecting the correct instrument for an online monitoring station.

14. Dedicated Sensors for Expanded Monitoring

A complete water-quality monitoring station does not always rely on one analyzer.

Depending on the project, the EUV-408 can be combined with dedicated sensors.

15. Installation Considerations

The analyzer is designed for immersion installation.

When planning the monitoring point, consider:

• Water depth
• Flow conditions
• Sediment accumulation
• Suspended solids
• Sensor accessibility
• Cable routing
• Maintenance access
• Installation bracket
• Cleaning requirements

The operating condition specified on the current page is:

0–45°C and <0.1 MPa

The standard cable length is:

5 m

Longer cable configurations may be customized according to project requirements.

16. Calibration and Maintenance

The EUV-408 supports two-point calibration.

For long-term monitoring, periodic inspection is recommended.

Maintenance planning should consider:

• Optical surface cleanliness
• Sediment buildup
• Biological growth
• Cable condition
• Sensor housing condition
• Calibration status
• Comparison with reference data where required

The correct maintenance frequency depends on water quality and site conditions.

Wastewater sites with high suspended solids or biological growth may require more frequent inspection than clean surface water.

17. How to Select the Right Monitoring Configuration

Before requesting a quotation or system design, provide the following information:

1. Water type
2. Required parameters
3. Expected concentration ranges
4. Installation location
5. Water depth
6. Flow conditions
7. Required sampling frequency
8. Required communication interface
9. Existing PLC, RTU or SCADA system
10. Power supply conditions
11. Need for wireless telemetry
12. Whether local or cloud data storage is required

This information allows the analyzer and communication architecture to be selected according to the actual project.

18. Build a Complete Online Water Quality Monitoring System

JW-EUV-408(K39) Multi-Parameter Water Quality Analyzer is designed for projects requiring continuous monitoring of multiple organic pollution and nutrient-related water-quality indicators.

By combining:

• Full-spectrum optical analysis
• Multiple parameter outputs
• Reagent-free operation
• RS485 Modbus RTU
• IP68 protection
• 316L stainless steel construction

the analyzer can serve as a core sensing component in industrial wastewater, municipal sewage, environmental surface-water and discharge monitoring systems.

For broader system integration, visit the JW-IoT Smart Water & Environmental Monitoring section.

For project selection, please provide:

• Required parameters
• Measurement ranges
• Water type
• Installation conditions
• Communication requirements
• Monitoring platform requirements

Contact JW-IoT for sensor selection and system integration support.