昆山DG-MWQ-II Multi-Parameter Online Water Quality Monitor

Product features: High integration, high precision, zero pollution, high reliability, cloud-based monitoring, digitalization, and capable of replacing imported products.

Category:

昆山Multi-parameter Water Quality Online Monitoring Instrument Series

Product Description

I. Application Scenarios

Tap water from the plant

Pipeline water

Secondary Water Supply

Surface water

Water Source Area

II. Product Features

High integration

High precision

Zero pollution

High Reliability

Cloud Monitoring

Digitalization

Alternative to imported products

III. Technical Specifications

● Measurement configurations: pH/Residual Chlorine/Conductivity/Turbidity/Temperature (Note: Actual parameters shall prevail based on the ordered specifications)

● Measurement range: pH: (0–14.00) pH; Temperature: (0–100)°C;

●Residual gas: (0-20) mg/1; Turbidity: (0-100) NTU; Conductivity: (0-2000) µS/cm

● Resolution and Interface: Resolution: 0.01 pH, Accuracy: ±1% FS

● Resolution: 1 µS/cm, Accuracy: ±2% FS

● Resolution: 0.01 mg/L, Accuracy: ±1% FS

● Resolution: 0.01 NTU, Accuracy: ±1% FS

● Resolution: 0.1℃, Accuracy: ±0.5℃

● Communication interface: RS485

● Power supply: AC 220V ±10%

● Operating environment: (0–50)℃

● Storage environment: Relative humidity: ≤85% RH (no condensation)

●External dimensions: 400mm × 280mm × 600mm (Length × Width × Height)

IV. Measurement Principle

PH: Hydrogen ions selectively permeate through the outer membrane of the working electrode, generating an electrochemical potential. This generated potential depends on the pH of the medium. The electrode incorporates an Ag/AgCl reference electrode, which maintains a stable potential unaffected by the acidity or alkalinity of the medium. The transmitter uses the Nernst equation to convert the potential difference between the working and reference electrodes into the corresponding pH value. Conductivity: Two coaxially arranged electrodes are placed in the sample solution. A voltage is applied across the electrodes, and the resulting current is measured. Using Ohm's law, the conductivity \( G \) or resistance \( R \) is calculated. Finally, the conductivity is determined by multiplying the measured value by the structure-specific electrode constant \( K \). Turbidity: Suspended particles scatter incident light in various directions. Among these, 90° scattered light is less influenced by particle size and is commonly used for turbidity measurement. A light source emits illumination, and the intensity of scattered light at the 90° angle is detected. The transmitter then calculates the turbidity based on the detected scattered light intensity. Residual Chlorine: The residual chlorine electrode operates under a constant voltage and consists of two platinum electrodes paired with a reference electrode, forming a micro-battery measurement system. During measurement, a stable potential is maintained at the electrode sensing end. Different target components produce distinct, linearly proportional current intensities at this specific potential. The transmitter converts the measured current value into a residual chlorine concentration reading.

V. Solutions

Online Monitoring Solution for Comprehensive Water Quality Safety in the Drinking Water Supply Chain