For a measurement device, &quot;accurate&quot; and &quot;reliable&quot; aren&#x27;t binary conditions, they&#x27;re continuums. Not every sensor in the world has to be medical grade. There are plenty of applications where a less accurate sensor at a much lower price point is the right choice.<p>Remember, I&#x27;m talking about situations where the company actually says &quot;not for medical&#x2F;diagnostic use&quot;. They&#x27;re not trying to get away with selling lemons.<p>To use your analogy: If I sell you a small LED (say for use as a power indicator on a computer) and you try to use it as a desk lamp, you shouldn&#x27;t be able to sue me on the grounds that &quot;you should have known I was going to use it as a desk lamp and made it fit for that purpose&quot;. That&#x27;s what seems unfair to me.