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Temperature sensor recommendation

Temperature sensor recommendation

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JustGreg
Posted by
on Apr 04 2012 03:38 AM
Expert2550 points

Hi!

I'd like to measure the temperature of two heated metal blocks with the size of a box of matches. One block should be around 50 degrees Celsius, the other one is 95. The controller type is not decided yet but most likely it will be an on/off or PID, running by a MSP430. I'm looking for a voltage or digital output temperature sensor for this purpose, +/- 1 Celsius accuracy would be sufficient. The measuring point would be inside the blocks, and the main electronics would be not too far from sensors (10-20 cm). I'd also like to ask how higher temperature (95 C) will affect the digital communication lines (p.e. I2C) between a digital output sensor and the main electronics?

Thank you. 


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  • Chris Featherstone
    Posted by
    on Apr 04 2012 20:31 PM
    Expert5125 points

    Greg,

    I would recommend looking into the TMP112. It's accuracy (temperature error) at most will be 0.5oC from 0oC to +65oC. In the range of -40oC to  +125oC it's accuracy (temperature error) at most will be+/-1oC.

    I am currently looking into your second question and will get back to you soon.

    Best Regards,

    Chris Featherstone
    Linear Characterization Engineer
    High Performance Linear Products

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  • Emmy Denton
    Posted by
    on Apr 19 2012 17:14 PM
    Intellectual1565 points

    Hi Greg,

    How will you be mounting the sensors to the blocks? Should they be fairly small?

    Thanks!

    Emmy
    Precision Systems Applications
    Texas Instruments SVA

    Emmy

    Integrated Signal Chain Applications
    Texas Instruments

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  • JustGreg
    Posted by
    on Apr 23 2012 06:14 AM
    Expert2550 points

    Hi Emmy,

     

    thank you for your reply. The mounting method depends on the sensor's package so we need to find the appropriate sensor first. The blocks would be around 60 x 50 mm and their thickness is around 20...25 mm. One possible mounting method is where the sensor would be placed inside a drilled hole, which would be filled up with thermal grease.

    Thank you.

     Best regards,

    Greg 


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