pH Indicator/ Controller/ Transmitter

The Accumax Instruments pH Controller is a state-of-the-art device designed for high accuracy and reliability in pH measurement. This pH Controller ensures precise monitoring with advanced features, perfect for industrial applications.
The Password-protected calibration feature allows for quick calibration, reducing downtime. The durable, waterproof housing ensures long-term reliability in harsh industrial environments. With RS485 Modbus communication, this pH Controller seamlessly integrates with SCADA systems and other industrial automation networks.
Whether you’re managing water treatment processes, ensuring the quality of food and beverages, maintaining optimal conditions in chemical manufacturing, or conducting environmental monitoring, the Accumax Instruments pH Controller is your reliable solution for accurate pH measurement.


  • High Accuracy: Precision pH measurements with ±0.1 pH accuracy.
  • Wide Measurement Range: Measures pH from 0 to 14.
  • Temperature Compensation: Automatic adjustment for temperature variations.
  • Digital Display: Large, backlit LCD for easy readability.
  • Easy Calibration: password-protected user selectable Buffer calibration up to 3 calibration points.
  • Communication: RS485 Modbus and 4-20mA output for SCADA system integration.
  • Relay Output: Available for process control and alarms.


Technical Specifications
  • Measurement Range: 0 to 14 pH
  • Accuracy: ±0.1 pH
  • Resolution: 0.01 pH
  • Temperature Compensation: Manual/Automatic, 0 to 100°C
  • Display: 16*2 LCD display
  • Power Supply: 85 – 300VAC 50/60Hz and 24VDC
  • Interface: RS485 Modbus, 4-20mA , 2 Relay
  • Calibration: user selectable Buffer calibration up to 3 calibration points.
  • Operating Temperature: 0 to 50°C (32 to 122°F)


  • Water Treatment Plants: Monitor and control pH levels in water treatment processes.
  • Food and Beverage Industry: Ensure product quality and safety.
  • Chemical Industry: Maintain optimal pH levels in manufacturing processes.
  • Pharmaceutical Industry: Monitor pH in drug production and research.
  • Environmental Monitoring: Measure pH in natural water bodies and samples.


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