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Can the same meter be used for pH, oxygen or CO2 sensors?
No!
All devices - except SDR, SFR and SFR vario - are either oxygen, pH or CO2 meters. They can only be used for the respective parameter. The SDR can detect either oxygen or pH, depending on the SensorDish® used. The SFR measures oxygen and pH simultaneously, and the SFR vario can detect O2, biomass & pH or CO2.