1. Industrial Online Salinity Sensor 4-20mA Salinity Transmitter Seawater Desalination Water Quality Salinity Detection - 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
Communication output: RS485 Modbus RTU
Power supply: 9～28VDC, power: <0.2W
Product Introduction
Online-salinity-sensor
AMT/DDL-300
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
- Seawater Desalination — Monitors salinity levels in desalination processes to ensure water quality and optimize membrane performance.
- Industrial Water Treatment — Used in cooling towers, boilers, and wastewater treatment to control conductivity and prevent scaling.
- Environmental Monitoring — Tracks salinity in rivers, lakes, and coastal waters for ecological and pollution studies.
- Aquaculture — Maintains optimal salinity for fish and shrimp farming to ensure healthy growth.
- Food and Beverage — Controls salinity in product lines and cleaning processes for consistent quality.
Keywords：online salinity sensor, salinity transmitter, 4-20mA salinity sensor, seawater desalination sensor, water quality salinity detection, conductivity sensor, RS485 Modbus salinity, industrial salinity meter
