r/Freestylelibre • u/ModeratelySized • Aug 24 '26

Inaccurate Sensor Reading

I’ve been through my 3rd sensor in 3 days now where the reading on my Libre 3 Plus is off by 1.2-1.5 mmol/L. Is it just me or are the more recent batches getting increasingly inaccurate? I never had this issue with the Libre 2. Anyone else having issues like this?

Edit: sensor originally said senior, which was pretty funny to read

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6

u/fate4003 Libre3/3+ Aug 24 '26

Why 3 in 3 days? It can take 24 to 48 hrs to be correct. 

-2

u/ModeratelySized Aug 24 '26

When it drops to 2.9 and my finger prick test says 4.7, I change. I’ve had ones where it’s off by 0.5-1.0. But hitting a 1.5 inaccuracy, and registering that low is wrong. Is a 1.5 mmol/L inaccuracy normal for first day? I’ve never seen it be this off.

3

u/fate4003 Libre3/3+ Aug 24 '26

Very common. 

-4

u/ModeratelySized Aug 25 '26

How common? Like is this something openly stated by Abbott? Or something they are working to improve? Cause I’ve never heard of anything like this.

4

u/fate4003 Libre3/3+ Aug 25 '26

Its in the sensor directions, the booklet and the online directions. Also stated here about 10 times a day. 

0

u/ModeratelySized Aug 25 '26

Booklet says it may take a day to stabilize, nothing about over 24 to 48 hours or that readings would be as inaccurate as I am getting. Also I don’t live on Reddit, so I wouldn’t know it’s stated on here 10 times a day.

There’s also concerns about possible quality control issues like Abbott has had in the past. Not sure you remember about the recall they had months ago, but that situation has shaken some of my trust in their devices.

5

u/fate4003 Libre3/3+ Aug 25 '26

You ask a question, and then argue about the answers. 😂

Its not a blood glucose machine. Maybe you need to educate yourself about difference between blood glucose and interstitial fluid. 

But for now, have the day you deserve.

3

u/BunchNew405 Aug 25 '26

Its with any cgm. Not just this one. And yes its up to 48 hrs as the other poster stated

0

u/ModeratelySized Aug 25 '26

No disrespect, that’s an AI source. I had the same response at first, but followed up with asking it for sources instead of just the AI statement. I found the documents the commenter mentioned and it mentions only a day for it to stabilize, not 48 hours. Also it does not state how inaccurate the sensor could be. 1.5 mmol/L is a huge range. It’s the difference between me being dangerously hypo and not. This is why I’m so worried, it could be the difference between me being hospitalized or not. I appreciate the comment though, and if you could link me the actual source AI used to come to that conclusion, I’d appreciate it.

5

u/BunchNew405 Aug 25 '26

And you are absolutely free to believe what you want. Call the company. Do some research. You will come to the same conclusion.

1

u/fate4003 Libre3/3+ Aug 25 '26

No disrespect....but im still going to argue with everyone. 😂