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Digital clinical thermometer

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AaronDu

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Who can tell me the Digital clinical thermometer circuit ???

Thank you

best regards
 

harri_el_sucio

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Sorry for language

Use the IC LM35 analog output 10 mv/ºC.
Precission 1ºC
 

harri_el_sucio

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Sorry for language

Use the IC LM35 analog output 10 mv/ºC.
Precission 1ºC
 

harri_el_sucio

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I forgot it!!!

LM35 is the National Semiconductor
You can put a voltimeter Digital
 

shorty

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Hi
i dont now the circuit but at http://www.conrad.de
you can get the sensor (very small NTC)
it has an offset of only 0,2% at 37°C
the articlenumber is 18 85 06 22
the price 4,29 euro/ps
i hope this was a little help

Shorty
 

johnyaya

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Analog Devices has some smaller than the to92 package that the lm35 comes in and more accurate too. But you'll pay more for it too. When you say "clinical" I assume you want a very accurate measurement. It would be better to state accuracy and resolution. All of these devices by default are NOT rated for medical equipment. If you are indeed making a medical device check with the component manufacturer. Lawsuits can ruin a business :sad:
 

G

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On 2002-04-14 07:50, AaronDu wrote:
Who can tell me the Digital clinical thermometer circuit ???
Thank you
best regards
These were orignated by a joint venture
between two Japanese companies. The sensor
is a precison thermistor and there is a
mask programmed MCU. I'm afraid there's not
much to it.. just the thermistor a resistor
or two (1%) the MCU (COB) and an LCD display
plus a couple of capacitors. The MCU has
some hardware on board to make an oscillator
and there is software linearization and
display.
 

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