I have bought my pH sensor and pH probes separately. No problem there. It's actually quite normal to do this, if only because the pH sensor can be used to read DO probes and other ion sensitive probes (they all work based on the same principle).
I have bought my pH sensor and pH probes separately. No problem there. It's actually quite normal to do this, if only because the pH sensor can be used to read DO probes and other ion sensitive probes (they all work based on the same principle).