The metering unit of sewage online COD analyzer refers to the part or component used for online measurement and metering of COD (Chemical oxygen demand) content in water bodies. It is the core part of the online COD analysis instrument, responsible for accurately measuring the COD concentration in water samples. It usually consists of COD sensors or detection units, signal processing units, control systems, and display/output interfaces.
The online COD analyzer metering unit for sewage usually includes the following main components:
1. Sensor or detection unit: The measurement unit in online COD analysis instruments usually uses specially designed sensors or detection units to measure the COD content in water samples. Sensors can use different technologies, such as chemical sensors, electrochemical sensors, or optical sensors, and appropriate sensor types can be selected based on the properties and application needs of the sample.
2. Signal processing unit: The signal processing unit in the metering unit is responsible for receiving measurement signals from sensors, and performing signal processing and conversion. It can perform operations such as amplification, filtering, and linearization to provide accurate measurement results.
3. Control system: Online COD analyzers are usually equipped with a control system for managing and monitoring the entire detection process. The control system can be responsible for calibrating sensors, controlling data collection and storage, and performing functions such as alarm and fault detection.
4. Display and output interface: The online COD analyzer metering unit can also include a display screen or output interface, used to display measurement results or output data to external devices. The display screen can display COD concentration value or other relevant information, and the output interface can transmit data to the computer, Data logger or monitoring system through digital signal, analog signal or communication interface.
The specific design and composition of the online COD analyzer measurement unit for sewage may vary depending on the instrument model and manufacturer, but its basic function is to measure and measure the COD concentration in water bodies.
