From: luweitest@gmail.com   
      
   On 2021-6-27 1:29, RichD wrote:   
   > I  ​wonder about those IR thermometers so prevalent    
   > during the past year.  Previously, I recall seeing them    
   > at deli salad bars, used to monitor the sour tureens.   
   >   
   > I understand the physics, the relationship between    
   > spectrum and temperature. What is the accuracy,   
   > considering the problems of focus and reflection,   
   > and ambient noise?   
   >   
   The accuracy is not good to my impression, but it's just for quick   
   scanning. And they usually have no emissivity setting (I guess they are   
   fixed to 0.95 or so).   
      
   > What's the internal sensor?    
   >   
      
   --   
   Regards,   
   Lu Wei   
   IM:	xmpp:luweitest@riotcat.org   
   PGP:	0xA12FEF7592CCE1EA   
      
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