The working principle of the online AB bucket water quality sampler is to coordinate the core components through an intelligent control system, trigger sampling according to preset rules or real-time water quality parameters, achieve sampling at different times and under different conditions by using the AB dual-bucket switching mechanism, and avoid cross-contamination through automatic cleaning. Ultimately, it realizes the standardized collection and storage of water samples. The following is the specific process:
1. Initialization Settings and trigger condition configuration
The control system (PLC/single-chip microcomputer) receives the sampling rules set by the user, such as:
Timed sampling: Collect water samples at fixed time intervals (such as once per hour).
Over-limit triggered sampling: Through real-time monitoring by water quality sensors (such as pH and COD sensors), sampling is automatically initiated when parameters exceed the threshold.
Flow tracking sampling: In combination with flow sensors, data is collected proportionally based on the flow rate (for example, once for every 100 tons of water flowing through).
2. Sampling trigger and sample collection
When the preset conditions are met, the main control module sends instructions to the sampling pump (peristaltic pump/diaphragm pump), driving the water flow through the sampling pipeline and the filtration device to draw the water sample into the system.
The filtration device (such as a filter screen or filter element) synchronously filters out large particles of impurities in the water to prevent pipeline blockage or sample contamination.
3. AB bucket switching and separate bucket storage
The solenoid valve/electric ball valve, as the core actuating component, switches the water flow direction according to the instructions of the control system.
Sampling in bucket A: The valve connects the pipeline of Bucket A, and the water sample is injected into Bucket A for storage.
Sampling in bucket B: Switch the valve to the pipeline of Bucket B, and inject the water sample into Bucket B for storage.
4. Automatic cleaning and anti-pollution mechanism
After a single sampling is completed, the cleaning pump starts, and clean water or cleaning agent is injected into the sampling system through the cleaning pipeline to flush the residual water sample in the pump body, pipeline and valve, preventing cross-contamination.
Waste liquid is discharged through the waste liquid discharge module. Some models are equipped with waste liquid recovery devices to prevent secondary pollution.
5. Data recording and remote monitoring
The data storage module records in real time information such as sampling time, bucket number, water quality parameters, and sampling volume, and displays them locally on the screen.
The communication module (such as 4G/NB-IoT, etc.) uplools data to the cloud platform. Users can remotely view the sampling status, download historical data, and even remotely adjust the sampling strategy.
6. Power supply and protection ensure continuous operation
The main power supply (alternating current) supplies power to the equipment, while the backup power supply (battery/UPS) maintains the system operation in case of power failure to ensure that sampling is not interrupted.
The waterproof and dustproof casing is suitable for outdoor or humid environments, ensuring long-term stable operation.
Summary of core logic
Intelligent triggering → Precise sampling → Bucket storage → Automatic cleaning → Data interconnection
Through modular design, the online AB bucket sampler has achieved full-process automation from "monitoring - response - execution", and is widely used in scenarios such as sewage treatment plants, water sources, and industrial wastewater discharge outlets, providing standardized water samples for water quality monitoring and pollution source tracing.