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Can the FU20F or FU24F SENCOM sensors be used to measure pH and ORP at the same time?

Can the FU20F or FU24F SENCOM sensors be used to measure pH and ORP at the same time?

Yes, the SENCOM Module in these sensors allows a Modbus Master to
connect using Modbus RTU protocol and access the following data:

  • pH
  • Temperature compensated pH
  • ORP
  • pH compensated ORP
  • rH
  • Temperature
  • Junction resistance value
  • Sensor details (Model, Serial Number, production date)
  • Sensor calibration data (zero, slope, temperature offset)
  • Sensor status signals (e.g. Glass impedance detection)

As shown in the diagram above, our pH is calculated by subtracting value B from value A. To do this the B value is stored inside the sensor and can be displayed independently at any time. Since ORP is simply the value of B, we can easily display both pH (A-B) and ORP (B) without any issues.

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