A replaceable laboratory-style probe was preferred over a sealed sensor, since pH drives the CO₂ control loop and drift there has real consequences.
What I've learned
·Because CO₂ is controlled from a pH drop rather than an absolute value, probe drift matters less than probe stability over a single day.
·The morning degassed reading is the reference point the whole control loop depends on.
Installation
Not yet documented.
Configuration
·Read by the controller
·Supplies the pH value the CO₂ target is held against, as a drop off the daily baseline
Maintenance
Not yet documented.
Known limitations
Not yet documented. Absence here means nothing has been written down, not that there are none.
Controller integration
Read by the Neptune Apex, which supplies the value the CO₂ loop works from.
Calibration
Calibrated against standard buffer solutions. Because CO₂ is controlled from a pH *drop* rather than an absolute value, day-to-day stability matters more here than absolute accuracy.
Live measurements
pH at peak CO₂
4.56
Degassed baseline
5.13
Read from this device on the overview page.
Maintenance history
No service dates recorded yet. Scheduled replacement applies to consumables; this item is tracked by condition instead.