Model recommendation:TH-ZS1SManufacturer of meteorological and environmental monitoring instruments and equipment, Yunjing Tianhe supports customized services for merchants. Choose Shandong Yunjing Tianhe for your equipment and rest assuredCOD monitoring instrument refers to an instrument used to measure chemical oxygen demand, which includes various forms such as laboratory type, portable type, and online type. Regardless of the type, its core function is to accurately quantify the amount of reducing substances in water samples that can be oxidized by strong oxidants. Laboratory COD monitors usually follow standard methods, operate rigorously, and have high accuracy in results. They are commonly used for arbitration, acceptance, and precision analysis. Portable COD monitoring devices facilitate rapid on-site screening. Online COD monitoring devices emphasize automation and continuity. The common goal of all COD monitoring instruments is to provide quantitative basis for evaluating the degree of organic pollution in water bodies, monitoring the effectiveness of sewage treatment, and ensuring compliance with discharge standards. They are one of the most commonly used and important analytical instruments in water environment management and protection.

1、 Product Introduction
Online water quality analyzer is an instrument that can monitor water quality COD online. It integrates water quality COD sensors and measurement modules for communication and storage, which can quickly and accurately record key parameters in water bodies. At the same time, the instrument supports the expansion of water quality multi parameter sensors, including but not limited to COD, ORP, pH value, dissolved oxygen (DO), conductivity, turbidity, ammonia nitrogen, temperature, etc. It can be combined and configured according to different needs and applications, record and store historical monitoring data and alarm history records, and support historical data export. xlsx. The RS485 interface supports the MODBUS-RTU communication protocol, allowing users to freely communicate and connect with devices such as PLC, DCS, configuration software, DTU, etc. to transmit data.

2、 Application fields of multi parameter water quality monitoring instrument

Online multi parameter water quality detectors are widely used for monitoring and controlling various water bodies, including but not limited to the following fields:

1. Water treatment plant: used to monitor the pH value, dissolved oxygen, turbidity and other parameters of tap water, ensuring the safety and hygiene of tap water.

2. Groundwater monitoring: used to monitor parameters such as pH value, conductivity, temperature, etc. of groundwater, in order to timely detect and solve water quality problems.

3. River and lake monitoring: used to monitor the water quality of rivers and lakes, such as dissolved oxygen, turbidity, ammonia nitrogen and other parameters, in order to take timely pollution control measures.

4. Ocean monitoring: used to monitor the water quality of the ocean, such as salinity, dissolved oxygen, temperature and other parameters, in order to timely detect and control marine pollution.

5. Sewage treatment: used to monitor the water quality parameters of sewage, such as pH value COD、 Ammonia nitrogen and other substances are used to control and regulate the sewage treatment process.

6. Industrial production: used to monitor the water quality status in the industrial production process, such as pH, conductivity, dissolved oxygen and other parameters, in order to adjust the process in a timely manner and ensure product quality.

7. Scientific research: used for water quality monitoring in the field of scientific research, such as eutrophication of lakes, climate change, and other studies.

3、 Technical characteristics of multi parameter water quality monitoring instrument

1. High reliability: suitable for long-term work in outdoor environments, with stable measurement and strong anti-interference ability.

2. Flexible and portable: Each probe can be freely combined and replaced independently, plug and play.

3. Scalability: Multiple sensors can be freely combined.

4. Multiple applications: rapid on-site measurement, emergency monitoring, or long-term online monitoring of groundwater, river water, lake water sources, and urban pipeline water.

5. Resilient shell: ABS+PC material, corrosion-resistant, capable of long-term continuous normal operation.

6. Compact structure: can be installed in smaller sizes.

7. Communication connection: RS485 expansion interface, isolated master/slave interface for independent communication.

4、 Technical parameters of multi parameter water quality analyzer

5Size chart

6、 Sensor configuration (optional)

PH	Measurement principle: electrochemistry (salt bridge) Signal mode: RS485 (MODBUS-RTU) Measurement range: 0~14 (PH) Resolution: 0.01 Measurement accuracy: ± 0.1PH ± 0.1 ℃ Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread
ORP	Measurement principle: electrochemistry (salt bridge) Signal mode: RS485 (MODBUS-RTU) Measurement range: -1500~+1500 (mV) Resolution: 1mV Measurement accuracy: ± 6 mV Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread
COD	Measurement principle: UV 254 absorption method dual light source measurement Signal mode: RS485 (MODBUS-RTU) Measurement range: 0~1000mg/L Resolution: 0.1mg/L Measurement accuracy: ± 5% ± 0.3 ℃ Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread self-cleaning function: equipped with an automatic cleaner to prevent biological attachment, avoid light window pollution, and ensure long-term monitoring stability; Automatic cleaning time and frequency can be set, with a power consumption of 0.7W
Conductivity EC	Measurement principle: Contact electrode method Signal mode: RS485 (MODBUS-RTU) Measurement range: 0~5000 us/cm Resolution: 1 US/cm Measurement accuracy: ± 1.5% ± 0.1 ℃ Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread
Dissolved oxygen (DO)	Measurement principle: Fluorescence lifetime method Signal mode: RS485 (MODBUS-RTU) Measurement range: 0-20mg/L Resolution: 0.01mg/L Measurement accuracy: ± 2% ± 0.3 ℃ Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread
Suspended solids SS	Measurement principle: scattered light method Signal mode: RS485 (MODBUS-RTU) Measurement range: 0~2000mg/L Resolution: 0.1mg/L Measurement accuracy: ± 5% (depending on sludge homogeneity) Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread
Turbidity TU	Measurement principle: scattered light method Signal mode: RS485 (MODBUS-RTU) Measurement range: 0~40NTU 0~1000NTU 0~3000NTU Resolution: 0.1NTU Measurement accuracy: ± 1% ± 0.3 ℃ Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread
ammonia nitrogen	Measurement principle: ion selective electrode method Signal mode: RS485 (MODBUS-RTU) Measurement range: 0-1000.00mg/L (default) 0-1000mg/l/(customizable) Resolution: 0.01mg/l Measurement accuracy: 10% of the reading, ± 0.5 ℃ Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread
chlorophyll	Measurement principle: Fluorescence method Signal mode: RS485 (MODBUS-RTU) Measurement range: 0-400ug/L Resolution: 0.01ug/L Measurement accuracy: R2>0.999 Cable length: 5 meters as standard Measurement environment: temperature 0~50 ℃ (non freezing),<0.2Mpa Waterproof rating: IP68 Installation method: Immersion installation, NPT3/4 thread self-cleaning function: equipped with an automatic cleaner to prevent biological attachment, avoid light window pollution, and ensure long-term monitoring stability; Automatic cleaning time and frequency can be set, with a power consumption of 0.7W