What's the type of this sensor?

Discussion in 'Embedded Systems and Microcontrollers' started by elborgy, Mar 19, 2015.

  1. elborgy

    Thread Starter New Member

    Nov 20, 2012
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    Hey guys, I have this skin probe, i wanna to measure skin temperature using microcontroller, but I can't find out what is the type of this sensor or what's the connection or the circuit diagram?
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Search Omega they make these products, most likely a bi-metal type sensor.
    Measure the resistance and note the change when warmed or cooled.
    Max.
     
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  3. elborgy

    Thread Starter New Member

    Nov 20, 2012
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    Thanks Max for your reply, I already measured the resistance, it's decreasing when I warming it
     
  4. MaxHeadRoom

    Expert

    Jul 18, 2013
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    It is probably a simple thermocouple as I mentioned, you could just measure the resistance on the range you want to measure and use that for a analogue input to and op-amp or what ever device or method of recording the output you intend.
    Max.
     
  5. elborgy

    Thread Starter New Member

    Nov 20, 2012
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    I think it is NTC Thermistor, is that right?
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
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  7. bertus

    Administrator

    Apr 5, 2008
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    Hello,

    I also think it is a NTC type sensor.
    A thermocouple would have different materials for the connections.

    Bertus
     
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  8. elborgy

    Thread Starter New Member

    Nov 20, 2012
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    Thermocouple depends on voltage change not resistance.
     
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