Help selecting Temperature sensor

Discussion in 'General Electronics Chat' started by aamirali, Feb 18, 2014.

  1. aamirali

    Thread Starter Member

    Feb 2, 2012
    415
    1
    I need to select temperature sensor for harsh environment condition.
    I have to put that sensor in snow layer repeatedly. & response time of sensor should be fastest.

    I was looking at thermocouple respone time here:
    http://www.omega.com/temperature/Z/ThermocoupleResponseTime.html.

    Is there any equivalent sensor for such harsh condition with fast response like hermocouple
     
  2. crutschow

    Expert

    Mar 14, 2008
    12,993
    3,229
    If the thermocouple response time is adequate, why not use a thermocouple?
     
  3. aamirali

    Thread Starter Member

    Feb 2, 2012
    415
    1
    thermocouple need cold junction compensation, which further include adding a new sensor
     
  4. matthew798

    Member

    Jan 16, 2013
    38
    2
    Ad585 is a thermocouple amplifier with internal cold junction compensation, you wouldn't need another sensor. You can power it with a 9v battery. I was able to make a great circuit with a sharpie and some etching. It's extremely simple

    Otherwise you'll need a thermistor (glass bead 100k from Epcos has a pretty quick response) with some kind of interpretation circuitry.

    You could build a fairly nice analog circuit with a thermistor that could control pretty much anything relative to the temperature with an opamp or something. Depends on what you intend to do with the temp info.

    Or you could just buy an infrared temp gun ;)
     
  5. crutschow

    Expert

    Mar 14, 2008
    12,993
    3,229
    Are you measuring absolute temperature or temperature differences?

    What type of readout do you need?
     
  6. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,974
    744
    the TMP36 will work from -40C to +150C, from a 5V supply
     
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