A pH controller is an electronic device used to monitor and adjust the pH level of a solution, ensuring it stays within a desired range. It’s commonly used in water treatment, chemical processing, agriculture, aquariums, and food industries.

ph controller

PH CONTROLLER

Origin: China

CleanTech Engineering Limited

Key Components of a pH Controller:

  • pH Sensor (Electrode):

    • Measures the pH of the solution.

    • Sends a voltage signal proportional to the pH value.

  • Controller Unit:

    • Receives the signal from the sensor.

    • Compares it to the setpoint (desired pH level).

    • Displays current pH value.

  • Control Output (Relay or Analog Output):

    • Activates dosing pumps, solenoid valves, or alarms.

    • Adjusts the pH by adding acid or base (alkali).

  • Dosing Pumps (optional, external):

    • Inject chemicals like HCl (acid) or NaOH (base) to correct pH.

How It Works:

  • pH sensor is placed in the process liquid.

  • Controller monitors the pH value continuously.

  • If the pH deviates from the setpoint:

    • Controller activates dosing system.

    • Acid or base is added until pH returns to the desired range.

Types of pH Controllers:

  • Manual pH Controllers: Require user to monitor and adjust.

  • Automatic pH Controllers: Adjust pH continuously without user intervention.

  • Digital Smart Controllers: Include data logging, remote access, and PID control.

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