[Stoves] Thermometers for WBT

[Inversiones Falcon]

thank you for the advice.
 
Gus


________________________________
From: Crispin Pemberton-Pigott <crispinpigott at gmail.com>
To: 'Discussion of biomass cooking stoves' <stoves at lists.bioenergylists.org> 
Sent: Sunday, January 6, 2013 3:58 PM
Subject: Re: [Stoves] Thermometers for WBT


Dear Tom
 
Please get something with a decent thermal mass. The tiny wires spot-welded together at the end are not very helpful at getting the temperature because they fluctuate so rapidly when the bubbles start rising. It should have an enclosing metal jacket of 3-8mm diameter. They still react quickly but not ‘instantly’.
 
I have also found that mounting it in the centre of a pot also heated in the centre (from below) gives misleading numbers. Prof Lloyd says there is actually no such thing as the boiling point of a whole pot of water. My conclusion is that the best we can get is the time at which the average temperature reaches its maximum. Using only one thermocouple in a round pot, it should be placed somewhere like 1/3 of the diameter towards the centre.  
 
Regards
Crispin
 
 
From:Stoves [mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Tom Miles
Sent: Sunday, January 06, 2013 2:49 PM
To: stoves at lists.bioenergylists.org
Subject: [Stoves] Thermometers for WBT
 
What are the lowest cost and most practical thermometers for the WBT? 
 
Many thanks
 
Tom
 
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