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by pastage 831 days ago
This is highly personal thing it is apparently very inaccurate for some people, I've never been below or over dangerous levels without it giving a warning. What has happend once or twice over the decade I've used it is that it will get stuck in a bad reading, so you do not see the variations. It has always got unstuck when I've gone below 3.5 mmol/liter or so.