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Any suitable humidity sensors for +125 degree C environment

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I am looking for a suitable low-cost humidity sensor for a "wearable" battery operated (low voltage / low power consumption) application within a high temperature (+125 degree C could reach +150 degrees) environment. The aim is monitor drying conditions within an industrial hot air dryer type operation which is drying wet objects. High temperatures would last from about 20mins up to 90mins. Electronics + alkaline or coin cell battery thermally insulated in suitable casing (just in case).

 

Any suggestions.

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  • in reply to dougw

    Thank you Douglas.

     

    I would like to be able to get a voltage/current signal from a module (preferable voltage).

    And, DT722 seems to do the job (and their other probe modules like WR283-P150). However, looking around the web, they all go for > 500 USD.

     

    As you suggest, I would love to connect the sensor, protective shell to an sensor board through wires so I build one for cheaper price.

    I would have the probe I made struct through the chamber and have the sensor board isolated to a more stable condition.

     

    Do you have any advice on how to read values of these sensors?

     

    Thanks!

    Talan