达州DG-MWQ-III 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:

达州Multi-parameter Water Quality Online Monitoring Instrument Series

Product Description

I. Application Scenarios

Tap water leaving the plant

Water supply network 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 specific order details)

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

Residual Chlorine: (0-20) mg/L; Turbidity: (0-100) NTU

Electrical 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: AC220V ±10%

● Operating environment: (0–50)℃

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

IV. Measurement Principle

PH: Hydrogen ions selectively permeate through the outer membrane of the working electrode, generating an electrochemical potential. This potential depends on the pH of the medium. The electrode incorporates Ag/AgCl as a reference electrode, ensuring a stable potential that remains unaffected by changes in the medium's acidity or alkalinity. 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 G or R value by a 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 therefore 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 level based on the detected scattered light intensity. Residual Chlorine: The residual chlorine electrode operates under a constant voltage, forming a micro-battery system consisting of two platinum electrodes and a reference electrode. During measurement, a stable potential is maintained at the electrode's sensing end. Different components being measured generate 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