This is a precise, fully isolated pH circuit constructed using high quality components and designed to work with reef-pi.

The circuit utilizes the newest isolation technology (power and data) to prevent noise from entering the circuit through the microcontroller, power supply or your aquarium. A pH circuit is a delicate volt meter and it doesn't take much to cause interference, with isolation noise is blocked so you continue to get accurate readings. This also blocks interference from multiple probes in the same aquarium.

You can connect multiple circuits using only 4 pins (SCL/SDA, +5v and GND) There's an extra set of headers on PCB to daisy chain multiple circuits.

  • Fully Isolated power and data lines
  • Calibration through Reef-pi
  • Manually Change and Save I2C Address to circuit
  • 0.001 - 14.000 Range
  • 0.001 Resolution (thousands)
  • +/- 0.005 Stability
  • +/- 0.01 Accuracy
  • Compatible with any brand and type of pH probe with BNC connector
  • 5v Operating Range
  • I2C Communication
  • 30mm x 70mm PCB size


Add an optional 3D printed case for the circuit, optionally you can print one yourself by downloading the STL files from your account.

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Robo-Tank Isolated pH Circuit for reef-pi

  • Product Code: ExactoPH
  • Availability: In Stock
  • $49.95 USD
  • $39.95 USD


Available Options

Kit Addons:
Name Quantity Price
+$5.00 USD
Total Box:

Case Colors Available:
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Total Box:


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Tags: robo-tank, isolated, circuit, for, reef-pi, sensors plug, and, play, hardware