Detailed explanation of online multi parameter water quality analyzer: functions, types, and applications in waterworks

1、 Online multi parameter water quality analyzer: definition and core value

1. Efficient monitoringReplacing a single parameter instrument, one device can achieve continuous measurement of multiple indicators, reducing equipment footprint and cost;

2. Reliable dataEquipped with high-precision sensors and automatic sewage and flow control functions to avoid manual operation errors;

3. real-time alertThe data can be uploaded to the central control or cloud platform for timely feedback when exceeding the standard, helping to quickly adjust the process (such as starting automatic dosing when residual chlorine is insufficient).

2、 Core monitoring parameters: mandatory indicators and standards for water treatment plants

1. residual chlorineCore sterilization index: The residual chlorine in the factory water should be ≥ 0.3mg/L (not less than 0.05mg/L at the end) to avoid bacterial residue causing diarrhea for users; If the residual chlorine in the secondary water supply is insufficient, it needs to be supplemented by adding chemicals through the pump room;

2. turbidityReflecting the turbidity of the water body, the turbidity of the finished water is ≤ 1NTU (high-quality tap water such as Shanghai has a yearly turbidity of 0.15-0.25NTU). A high turbidity means that impurities such as sediment and colloids have not been filtered thoroughly;

3. PHControl the acidity and alkalinity environment of water bodies within the national standard range (usually 6.5-8.5) to avoid excessive acidity or alkalinity affecting water quality, taste, and pipeline lifespan;

4. conductivityReflecting the ion content in water, which varies greatly from place to place (about 300 μ S in Shanghai and up to 2000 μ S in some areas of Shaanxi), it can assist in determining the purity of water quality;

5. temperatureAuxiliary parameters affect the stability of indicators such as pH and residual chlorine, and the effluent temperature of water plants is mostly between 10-20 ℃.

3、 Types of online multi parameter water quality analyzers: three mainstream models suitable for different scenarios

（1） Cabinet Stand: Large ScenepreferredComprehensive functionality

1. Core FeaturesHeight of about 1.1 meters, designed with water and electricity separation (the upper part is the electrical unit, and the lower part is the waterway and sensors), equipped with flow meter, manual regulating valve, and automatic drain valve as standard;

2. advantageSensors are installed independently (pH, residual chlorine, turbidity, etc. can be disassembled and maintained separately), and the waterway design has follicular function to avoid bubble interference with data; Support 485 communication and data export (USB interface);

3. Adaptation scenarioWater plant effluent monitoring and large-scale secondary water supply pump room, suitable for scenarios with sufficient space and long-term stable monitoring;

4. detail designSmall inlet and large outlet to prevent water retention; Automatically drain water and sediment for 2 minutes during power outage and restart.

（2） Wall mounted crane: Water saving and flexible, with digital sensors as the main focus

1. Core differenceCompared to cabinet machines, it has a smaller volume and can be wall mounted; Equipped with an automatic valve at the inlet end, it supports timed water intake (such as cutting off for 2 hours and turning on for 1 hour), reducing daily water consumption by 2/3;

2. Technical HighlightsUsing digital sensors, pre calibrated before leaving the factory, on-site replacement does not require recalibration (disassembly and installation, plug in and use); The integration of electronic control and data storage into sensors makes operation more convenient;

3. Adaptation scenarioSmall and medium-sized water plants, community secondary water supply stations, suitable for scenarios with limited space and water conservation requirements.

（3） Mini Wall Hanging Machine: Integrated and Dedicated, Compact and Portable

1. Core strengthsNo shell design, with a volume only one-third of the wall mounted machine, highly integrated flow pool and electronic control; The sensor is compatible with wall mounted devices (digital type), and the power cord is a standard two plug design with minimal installation;

2. Function retentionStandard flow meter, automatic sewage discharge, support 485 communication and wireless data upload (requires external equipment);

3. Adaptation scenarioThird party integration projects (such as pump room renovation and water quality monitoring stations) are suitable for scenarios with limited installation space and the need for rapid integration;

4. PrecautionsDo not arbitrarily modify the structure (such as removing the cleaning module), otherwise it may cause sensor contamination and data deviation.

4、 Application process of water treatment plant: closed-loop monitoring from raw water to user end

1. Raw water monitoringInstall equipment in water sources (reservoirs, groundwater) to measure turbidity and dissolved oxygen PH、 Ammonia nitrogen, etc., to determine the degree of water source pollution;

2. Preprocessing stageAfter adding flocculant, monitor turbidity PH， Determine the sedimentation effect; Measure turbidity at the outlet of the sedimentation tank to ensure that sediment and flocs are filtered thoroughly;

3. Deep processing stageTurbidity measurement at the outlet of the filter tank PH， Monitor the odor and color after adsorption with activated carbon to ensure the purity of the water body;

4. Disinfection stageAfter adding residual chlorine (or ozone, ultraviolet), monitor the residual chlorine content to ensure the sterilization effect; The residual chlorine and turbidity of the factory water need to be measured simultaneously PH、 Conductivity, data upload to central control;

5. End monitoringInstall equipment in the secondary water supply pump room, measure residual chlorine (to prevent insufficient water at the end due to pipeline consumption), and ensure water quality at the user end.

5、 Daily maintenance and common troubleshooting: ensuring stable operation of equipment

（1） Key points of daily maintenance

1. sensor calibrationPH sensors are recommended to be calibrated every 3 months, and residual chlorine and turbidity sensors should be replaced once a year;

2. Pipeline cleaningAfter the new pipeline or replacement of the water intake point, it is necessary to first drain and flush (to avoid rust and impurities contaminating the sensor); Regularly manually clean the turbidity sensor mirror to prevent sediment from covering it;

3. Pollutant discharge inspectionEnsure that the automatic drain valve is functioning properly (default once a day) to avoid blockages that may result in larger turbidity data.

（2） Common troubleshooting solutions

1. Touch screen has no displayFirstly, check the power supply (switch, power line contact), and then check if the equipment fuse is burnt out. If everything is normal, it needs to be returned to the factory for repair;

2. All data is 0Check the sensor cable connection (especially the nine pin ribbon cable on the back of the device), which is often due to communication failure;

3. The turbidity data is too largeCheck if the drain valve is blocked and if the sensor mirror is contaminated. The new pipeline needs to be flushed before connecting the equipment;

4. Deviation of residual chlorine dataCompare with a third-party instrument, and if the deviation is confirmed, calibrate the instrument on site (according to the known concentration).

6、 Data transmission and platform integration: achieving remote monitoring

1. Wired transmissionConnect to the user control system and display data from various monitoring points in a centralized manner;

2. wireless transmissionExternal wireless sending device (insert SIM card or IoT network card), upload to cloud platform, support viewing on mobile APP;

3. Platform adaptationEquipped with standard ports, it can be connected to enterprise owned platforms; No platform users can purchase monthly accounts, enabling low-cost remote monitoring.