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One of my meters is lying
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<blockquote data-quote="Oldvatr" data-source="post: 2405976" data-attributes="member: 196898"><p>So far no one has called out the elephant in the room. My Codefree meter is the one suspected of lying, and it uses the GOD Sensor (Really! Glucose oxidase technology or GOD). My treatise so far has deviated to looking at the GDH-FAD sensor used in the other meter of mine. Not to worry. Apparently and according to some papers I have read, the GOD ones are more susceptible to xylose as well as maltose. Now the ISO standard only lists Maltose as an interferent, and only tests maltose but not xylose. Apparently, the earlier technology of FAD sensors was also susceptible, but the new FAD3 grade that is being used in recent meters is designed to filter it out and do not react to this monosaccharide. Not sure what grade the Caresense Dual uses. The new Navii from SD is claiming that it too is not as sensitive as the older Codefree, and it uses a GDH FAD sensor technology. However, it may be that SD is already aware of the effect I am seeing, and hopefully, their replacement meter is more robust.</p><p></p><p>I have pinged off an email to SDBiosensor in Korea to see if they have any answers.</p></blockquote><p></p>
[QUOTE="Oldvatr, post: 2405976, member: 196898"] So far no one has called out the elephant in the room. My Codefree meter is the one suspected of lying, and it uses the GOD Sensor (Really! Glucose oxidase technology or GOD). My treatise so far has deviated to looking at the GDH-FAD sensor used in the other meter of mine. Not to worry. Apparently and according to some papers I have read, the GOD ones are more susceptible to xylose as well as maltose. Now the ISO standard only lists Maltose as an interferent, and only tests maltose but not xylose. Apparently, the earlier technology of FAD sensors was also susceptible, but the new FAD3 grade that is being used in recent meters is designed to filter it out and do not react to this monosaccharide. Not sure what grade the Caresense Dual uses. The new Navii from SD is claiming that it too is not as sensitive as the older Codefree, and it uses a GDH FAD sensor technology. However, it may be that SD is already aware of the effect I am seeing, and hopefully, their replacement meter is more robust. I have pinged off an email to SDBiosensor in Korea to see if they have any answers. [/QUOTE]
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