Overview
SMART series intelligent multi-parameter universal controller has high accuracy, its unique professional design can be applied in water, chemical, pharmaceutical, food and hygiene in the production process of the most extreme physical and chemical environments. SMART series intelligent multi-parameter universal controller has modular bus structure, highly scalable functionality, high reliability and comfortable operation.
Principle
Total dissolved solids (TDS), also known as total dissolved solids, is the total amount of all solutes in water, including both inorganic and organic content. Since organic matter and molecular inorganic matter contained in natural water are generally not considered, the salt content is generally referred to as total dissolved solids.
Salinity refers to the amount of dissolved salts per kilogram of water, and can be understood as the concentration of salt in the water.
In general, the higher the conductivity, the higher the salt content, and the higher the TDS, which means that the water contains more impurities. Generally 1TDS=0.5μS/cm.
In liquid conductors, current is generated by the movement of free ions. According to Ohm's law: I=U/R=U*G, solution conductivity: C=G*d/A=G*k (d is the distance between the plates, A is the area of the plates, and the electrode constant k=d/A[ cm-1]).
Electrode type: The conductivity is measured by using 4 electrodes equivalent to the two plates of the capacitor.
Inductive type: The transmitting coil generates an alternating magnetic field, which generates an induced voltage in the medium to move the positively or negatively charged ions in the liquid, and form an alternating current in the liquid. The current generates an alternating magnetic field in the receiving coil, and the circuit has a certain proportional relationship between the induced current generated by the coil and the conductivity, thereby measuring the conductivity. Since ion clusters are formed on the positive plate of the small face, the free movement of positive and negative ions is hindered, and it is impossible to measure solutions with high ion concentration, so an inductive sensor is required.
Typical application
▲Source water monitoring
▲Filter backwash detection
▲Filter monitoring
▲Driking-water quality monitoring
▲Separation process monitoring
▲Cooling water monitoring
▲Circulating water detection
▲Sludge treatment monitoring
▲Aeration tank monitoring
Feature
★Smart digital MEMS sensor
★Sensor self-diagnosis, proactively reminding maintenance and management
★The sensor automatically completes all compensation and measurement algorithms
★Quick response sensor
★IP68 Sensor
★Automatic temperature compensation
★Good robustness
★4-electrode/inductive sensor
Applicaiotn Case
▲Power plant: the quality of boiler feed water
▲Pharmaceutical: ultrapure water
Controller features
• Quick and convenient
The navigation menu contains 6 languages, which can be operated easily.
• Process safety
4.3" or 7" large size color LCD touch screen, convenient and safe touch operation and debugging
Large size screen with red flashing alarm, clearly visible from long distances and in dark areas
Alarm immediately, safe the process
• Alarm event record
Real-time data curve display
Record function for up to 6000 alarms
• Expert calibration function
Multi-point calibration function up to 9 point
• Powerful self-diagnosis function
Built-in heartbeat monitoring function and watchdog
Monitor the status of controllers and sensors, and promptly remind customers to take necessary maintenance
High-standard hardware and software security and password protection
• Powerful control function
High(low) limit control function
Optional: Timer control(automatic cleaning) function
Optional: analog PID controller
Optional: PWM controller
• Flexible fieldbus communication functions for IOT4.0
Optional fieldbus MODBUS, HART, Foundation Fieldbus FF, PROFIBUS PA, PROFIBUS DP, etc.
Product datasheet: TDS Analyzer 
, if you need more information, please contact us at info@mzdd.de.