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water temperature sensors for bs2 — Parallax Forums

water temperature sensors for bs2

gregpgregp Posts: 3
edited 2010-06-15 15:45 in BASIC Stamp
Does any one know where i can buy a water temperature sensors for a bs2·at 5' of water ? and if they have any sample code ? thank you for your help new to microcontrollers....

Comments

  • Mike2545Mike2545 Posts: 433
    edited 2010-06-08 00:57
    I have never done it but you may be able to encapsulate a sensor of your choice in a small length of plastic tubing and seal the whole thing in silicone.

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    Mike2545
  • ercoerco Posts: 20,259
    edited 2010-06-08 00:58
    You could spend a lot or a little, depending on your temp range. Simple waterproofing will work at 5 feet of water. You could use a simple thermistor with 2 wires, or an A/D temp IC with 3 wires. Encapsulate your sensor & wires with a thin layer of epoxy for waterproofness. The thin layer keeps your thermal lag time to a minimum.

    FYI, you would read the analog thermistor like a variable resistor using RCtime. You would need to make your own calibration lookup table or do a curve fitting to calibrate. Thermistors are cheap and easily found at many electronic stores. Radio Shack·used to carry·the 271-110, but they are discontinued now. Hosfelt has them for 50 cents at http://www.hosfelt.com/contents/en-us/d286.html#p2252

    See the Parallax digital sensor at· http://www.parallax.com/Store/Sensors/TemperatureHumidity/tabid/174/CategoryID/49/List/0/SortField/0/Level/a/ProductID/84/Default.aspx
    This is precalibrated, and a very good value at $6. You would read this using serial commands.

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    ·"If you build it, they will come."
  • MarkovMarkov Posts: 19
    edited 2010-06-15 00:54
    "Bitspower G 1/4in. Temperature Sensor Stop Fitting Product Description & Info
    Keep close tabs on the temperature of your liquid cooling system with this simple thermal sensor from Bitspower. The sensor itself is embedded in a special enclosed plug with G 1/4" Threads, and an o-ring to ensure a leak-free seal.

    Most Fan Controllers and some motherboards have positions for temperature monitoring on their circuit boards, and can integrate with this sensor. The connection type is a standard 2-pin black connector. Temperature range is -30 C to 105 C, and wire length is 90 cm.


    Availability: Usually ships the same business day.

    BP-WTP-CT$7.95"
    Sidewindercomputers.com
  • NewBeeNewBee Posts: 35
    edited 2010-06-15 11:17
    www.Omega.com, has everything you could ever need for most any kind of sensor. Parallax has a nice little mini printed circuit board using the DS1621, integrated as a thermocouple sensor and as well as good sample code complete with look up tables.
  • NewBeeNewBee Posts: 35
    edited 2010-06-15 12:22
    Sorry, I meant DS2760
  • dredre Posts: 106
    edited 2010-06-15 15:45
    Hi,

    Would this help:

    http://www.emesystems.com/tf_diy.htm

    cheers, David
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