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I have two Neptune double junction pH probes. Both were calibrated at the same time. One probe will go in my calcium reactor, the other in my sump.
Right now though, the probes are in the same compartment in my sump, but read different values: 8.18 and 8.30. When I noticed this, I re-calibrated both probes. No change.
What is the acceptable variance for pH probe accuracy and precision?
Right now though, the probes are in the same compartment in my sump, but read different values: 8.18 and 8.30. When I noticed this, I re-calibrated both probes. No change.
What is the acceptable variance for pH probe accuracy and precision?