Disposable, pre-calibrated, pre-validated sensors for use in bio-processing applications
First Claim
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1. A method of measuring the electrical conductivity of a bio-processing fluid, comprising:
- providing a particular pre-sterilized disposable electrical conductivity sensor assembly having a sensor component, a memory component and a conduit for directing a bio-processing fluid for electrical interaction with the bio-processing fluid flowing through the conduit;
running a bio-processing fluid through the conduit of the particular electrical conductivity sensor assembly;
passing a current through the particular electrical conductivity sensor component during said running of the bio-processing fluid through the conduit and measuring a resulting change in an electrical value across the sensor component, said change in electrical value being indicative of a measured electrical conductivity value of the bio-processing fluid;
retrieving a sensor-specific constant stored on the memory component of the particular electrical conductivity sensor assembly; and
calculating the actual electrical conductivity of the bio-processing fluid, said calculating comprising mathematically combining the measured electrical conductivity value with said stored constant.
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Abstract
Disposable, pre-sterilized, and pre-calibrated, pre-validated conductivity sensors are provided. These sensors are designed to store sensor-specific information, such as calibration and production information, in a non-volatile memory chip on the sensor. The sensors are calibrated using 0.100 molar potassium chloride (KCl) solutions at 25 degrees Celsius. These sensors may be utilize with in-line systems, closed fluid circuits, bioprocessing systems, or systems which require an aseptic environment while avoiding or reducing cleaning procedures and quality assurance variances.
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Citations
7 Claims
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1. A method of measuring the electrical conductivity of a bio-processing fluid, comprising:
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providing a particular pre-sterilized disposable electrical conductivity sensor assembly having a sensor component, a memory component and a conduit for directing a bio-processing fluid for electrical interaction with the bio-processing fluid flowing through the conduit; running a bio-processing fluid through the conduit of the particular electrical conductivity sensor assembly; passing a current through the particular electrical conductivity sensor component during said running of the bio-processing fluid through the conduit and measuring a resulting change in an electrical value across the sensor component, said change in electrical value being indicative of a measured electrical conductivity value of the bio-processing fluid; retrieving a sensor-specific constant stored on the memory component of the particular electrical conductivity sensor assembly; and calculating the actual electrical conductivity of the bio-processing fluid, said calculating comprising mathematically combining the measured electrical conductivity value with said stored constant. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification