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Anonymous Poster

temperature sensor

01/12/2009 12:53 AM

I found a temperature sensor/switch(I am not sure) which when dipped in liquid,a bulb glows dimly connected in series to it. Now,when the temperature of the liquid reaches a particular value,the bulb glows brightly. Can anyone tel me what this sensor is and how it works?
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craigza
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South Africa - Member -

Join Date: Nov 2008
Location: Johannesburg
Posts: 295
Good Answers: 12
#1

Re: temperature sensor

01/14/2009 1:36 AM

Hi there,

If you do not have an external voltage connected in the circuit - then it sounds as if you have a temperature sensor known as a thermocouple. You have two dissimilar materials and they generate voltage potential as the temperature changes. Seebeck discovered this principle.

For more information: http://en.wikipedia.org/wiki/Thermocouple

Regards,

Craig
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