1. Four-electrode online salinity sensor, corrosion-resistant PVDF, online salinity detection electrode for high-concentration brine - AMT/DDL-300
Conductivity range: 0-5000uS/m, 0-100000uS/em (graphite four-electrode conductivity
Resolution: 0.001mS/em
Basic error: +2%F.S
Temperature: -10-150°C
Temperature error: ±0.3°C
Automatic or manual temperature compensation range
Temperature compensation: 0～60°C
Product Introduction
Online-salinity-sensor
AMT/DDL-300
70911001
Online Conductivity Sensor
Measurement principle: To avoid electrode polarization, the sensor circuit generates a highly stable sine wave signal applied to the electrodes. The current flowing through the electrodes is proportional to the conductivity of the measured solution. The instrument converts the current into a voltage signal through a high-impedance operational amplifier, then after
After program-controlled signal amplification, phase-sensitive detection, and filtering, a potential signal reflecting conductivity is obtained; the microprocessor alternately samples the temperature signal and conductivity signal through switch switching, and after calculation and temperature compensation, obtains the conductivity of the measured solution at 25°C
value and the temperature value at that time.
Temperature compensation principle: The conductivity of electrolyte solutions is affected by temperature changes and requires temperature compensation. The temperature coefficient of weak aqueous solutions is 2.00%/°C; the higher the concentration, the smaller the temperature coefficient. For lower concentration (1µS·cm－1) solutions
The temperature coefficient does not use 2.00%/°C, but is set by the user, with a range of 0.00～9.99%.
Conductivity range: 0-5000uS/m, 0-100000uS/em (graphite four-electrode conductivity
Resolution: 0.001mS/em
Basic error: +2%F.S
Temperature: -10-150°C
Temperature error: ±0.3°C
Automatic or manual temperature compensation range
Temperature compensation: 0～60°C
Communication output: RS485 Modbus RTU
Power supply: 9～28VDC, power: <0.2W
Main Application Areas
- Brine Concentration Monitoring — Real-time salinity measurement in high-concentration brine solutions for chlor-alkali and salt production.
- Industrial Wastewater Treatment — Continuous monitoring of salinity and conductivity in effluent streams to ensure environmental compliance.
- Food and Beverage Processing — Salinity control in pickling, brining, and seasoning processes to maintain product consistency.
- Chemical Processing — Monitoring of conductive solutions in reactors and pipelines for process optimization and safety.
- Water Quality Analysis — Online salinity detection in surface water, groundwater, and drinking water sources.
Keywords：online salinity sensor, four-electrode conductivity sensor, PVDF salinity probe, high concentration brine sensor, industrial salinity meter, corrosion-resistant conductivity electrode, inline salinity analyzer, water quality salinity sensor
