A method of manufacturing a disposable conductivity sensing device for a bio-processing fluid for bio-processing applications, comprising: providing a single-use conduit for directing a bio-processing fluid; positioning a single-use sensor component and a single-use memory component on the disposable conductivity sensing device such that said sensor component electrically interacts with bio-processing fluid flowing through the conduit; running a calibration fluid through the conduit, said calibration fluid having a known conductivity value; measuring an electrical value of the sensory component during said running of the calibration fluid through the conduit in order to measure the conductivity for the calibration fluid as detected by the particular sensing device, said electrical value being selected from current, voltage and combinations thereof; calculating a cell constant for said particular sensing device by mathematically combining said known conductivity value of the calibration fluid with the measured conductivity value thereof; determining the temperature value (Tsens) of the calibration fluid using an un-calibrated thermistor on the sensor device; utilizing a NIST-traceable thermometer or thermistor to measure the temperature value (Tref) of the calibration fluid; calculating a temperature offset for said particular sensing device by mathematically combining said temperature value (Tref) with the measured temperature value (Tsen) thereof; storing the cell constant and the temperature offset in the memory component on the disposable sensing device in order to provide a pre-calibrated sensing device; calculating a statistical performance value based on individual measurement performances of a plurality of said pre-calibrated sensing devices within a sensor production batch; and storing the statistical performance value in the memory component on the disposable sensing device. providing a single-use conduit for directing a bio-processing fluid; positioning a single-use sensor component and a single-use memory component on the disposable conductivity sensing device such that said sensor component electrically interacts with bio-processing fluid flowing through the conduit; running a calibration fluid through the conduit, said calibration fluid having a known conductivity value; measuring an electrical value of the sensory component during said running of the calibration fluid through the conduit in order to measure the conductivity for the calibration fluid as detected by the particular sensing device, said electrical value being selected from current, voltage and combinations thereof; calculating a cell constant for said particular sensing device by mathematically combining said known conductivity value of the calibration fluid with the measured conductivity value thereof; determining the temperature value (Tsens) of the calibration fluid using an un-calibrated thermistor on the sensor device; utilizing a NIST-traceable thermometer or thermistor to measure the temperature value (Tref) of the calibration fluid; calculating a temperature offset for said particular sensing device by mathematically combining said temperature value (Tref) with the measured temperature value (Tsen) thereof; storing the cell constant and the temperature offset in the memory component on the disposable sensing device in order to provide a pre-calibrated sensing device; calculating a statistical performance value based on individual measurement performances of a plurality of said pre-calibrated sensing devices within a sensor production batch; and storing the statistical performance value in the memory component on the disposable sensing device.