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Thread: URGENT! Atmosphere and humidity sensor

  1. #1

    Question URGENT! Atmosphere and humidity sensor

    Could someone tell me the part name and rough price of the following.

    1) Air pressure measurement. I'm looking for an ic or something of that sort that measures atmospheric pressure. I found this one MPX2100 but couldn't find a price.

    2) soil humidity measurement. I haven't found any chip for this.

    I'm working on a bit of a price constraint, so could someone point me to the cheapest ones. I've been searching all over the net but couldn't find Indian prices.

    Thank you.

  2. #2
    Senior Member T-1000 akshay66's Avatar
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    Try these:
    http://www.vegarobokit.com/sub_categ...category_id=45

    maybe you find something usefull.
    Redefine it your way!!!!

  3. #3

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    Thanks
    but Went through those and those are atmospheric humidity sensors. I'm looking for a soil humidity sensor and atmospheric pressure sensor

  4. #4
    Administrator T-1000 vikas's Avatar
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    Not many indian vendors , Buy from US ... there are a whole lot available and easily.

    Else DIY -

    http://www.cheapvegetablegardener.co...re-sensor.html
    Vikas Patial

  5. #5
    Super Moderator T-1000 docel's Avatar
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    Soil Humidity sensor is just a glorified Ohm meter. Take a DMM and stick the probes into the soil in the 2M or 20M ohm range. The resistance reading on the multimeter will be a function of the Soil humidity= moisture= water=wetness.

    Or ...should I be even more basic than this?


    and yes ...cheap?? you can make a Soil Humidity meter for as cheap as 10 bucks

    ps: I'm sure- a long and tortuous number of posts will result as arguments for & against my simple statement.....
    Last edited by docel; 06-29-2010 at 05:30 PM.
    docel
    ^Anything is possible..
    after YOU prove it!!

    http://bangalorerobotics.tripod.com

  6. #6

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    I'm keeping that method as my last resort as it is highy dependant on the soil composition and pH. This would mean that I would have to calibrate it everytime which is not possible in this case. I was looking more importantly for the atmospheric pressure measurement.

    Does anyone know of the cost of MPX2100 or any such devices?

  7. #7
    Super Moderator T-1000 docel's Avatar
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    Huh ??

    Quote Originally Posted by docel View Post
    [COLOR=Blue]
    ps: I'm sure- a long and tortuous number of posts will result as arguments for & against my simple statement.....
    Huh ??

    Did you Really, really search the net ??

    I think you should 'know' what you want thoroughly before asking for information or tell us what you want it for in detail- the application.

    I did a simple Google and found 16,980 instances of your first requirement and 1,84,000 of the latter. All with price tags and other such colorful details that are more than necessary.

    Next thing we know, you'll complain that your sensor will not work below MSL....
    docel
    ^Anything is possible..
    after YOU prove it!!

    http://bangalorerobotics.tripod.com

  8. #8
    Super Moderator T-1000 docel's Avatar
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    Huh ??

    Quote Originally Posted by docel View Post
    [COLOR=Blue]
    ps: I'm sure- a long and tortuous number of posts will result as arguments for & against my simple statement.....
    Huh ??

    Did you Really, really search the net ??

    I think you should 'know' what you want thoroughly before asking for information or tell us what you want it for in detail- the application.

    I did a simple Google and found 16,980 instances of your first requirement and 1,84,000 of the latter. All with price tags and other such colorful details that are more than necessary.

    Next thing we know, you'll complain that your sensor will not work below MSL or below freezing....

    So, lets be realistic: post your application in detail and lets see if anyone on the Forum can something specific.
    docel
    ^Anything is possible..
    after YOU prove it!!

    http://bangalorerobotics.tripod.com

  9. #9
    Super Moderator T-1000 docel's Avatar
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    Huh ??

    Quote Originally Posted by docel View Post
    [COLOR=Blue]
    ps: I'm sure- a long and tortuous number of posts will result as arguments for & against my simple statement.....
    Huh ??

    Did you Really, really search the net ??

    I think you should 'know' what you want thoroughly before asking for information or tell us what you want it for in detail- the application.

    I did a simple Google and found 16,980 instances of your first requirement and 1,84,000 of the latter. All with price tags and other such colorful details that are more than necessary.

    Next thing we know, you'll complain that your sensor will not work below MSL or below freezing....

    So, lets be realistic: post your application in detail and lets see if anyone on the Forum can suggest something specific.
    docel
    ^Anything is possible..
    after YOU prove it!!

    http://bangalorerobotics.tripod.com

  10. #10
    Super Moderator T-1000 docel's Avatar
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    Did you Really, really search the net ??

    I did a simple Google and found 16,980 instances of your first requirement and 1,84,000 of the latter. All with price tags and other such colorful details that are more than necessary.

    Next thing we know, you'll complain that your sensor will not work below MSL or below freezing....

    So, lets be realistic: post your application in detail and lets see if anyone on the Forum can suggest something specific.
    docel
    ^Anything is possible..
    after YOU prove it!!

    http://bangalorerobotics.tripod.com

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