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
Origin: China
CleanTech Engineering Limited
Key Components of a pH Controller:
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pH Sensor (Electrode):
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Measures the pH of the solution.
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Sends a voltage signal proportional to the pH value.
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Controller Unit:
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Receives the signal from the sensor.
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Compares it to the setpoint (desired pH level).
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Displays current pH value.
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Control Output (Relay or Analog Output):
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Activates dosing pumps, solenoid valves, or alarms.
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Adjusts the pH by adding acid or base (alkali).
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Dosing Pumps (optional, external):
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Inject chemicals like HCl (acid) or NaOH (base) to correct pH.
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How It Works:
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pH sensor is placed in the process liquid.
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Controller monitors the pH value continuously.
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If the pH deviates from the setpoint:
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Controller activates dosing system.
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Acid or base is added until pH returns to the desired range.
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Types of pH Controllers:
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Manual pH Controllers: Require user to monitor and adjust.
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Automatic pH Controllers: Adjust pH continuously without user intervention.
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Digital Smart Controllers: Include data logging, remote access, and PID control.