From: dave@davehigton.me.uk   
      
   In message    
             The Natural Philosopher  wrote:   
      
   > On 26/03/2024 18:16, Ahem A Rivet's Shot wrote:   
   > > On Tue, 26 Mar 2024 17:33:50 +0000 Jim H  wrote:   
   > >   
   > > > Assuming the "oil" you're talking about is kerosene/heating fuel, the   
   > > > speed of sound is 1330 m/sec so 0.5cm takes 3.76 micro-sec.   
   > >   
   > > 	I would have thought it's measuring the distance to the surface of   
   > > the oil from above the oil so it would be the speed of sound in air that   
   > > matters 300m/s.   
   > >   
   > Correct, Mrs Shot. Anyway it's died within 30 minutes of going back on   
   > 'short echo'... So its definitely sensitive to that in some way.   
   >   
   > I'll add more debug code tomorrow   
      
   Are you sure the sensor isn't malfunctioning as a result of being in   
   oil vapour?   
      
   David   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)