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Gas pressure sensor — Parallax Forums

Gas pressure sensor

rjdjrjdj Posts: 9
edited 2007-03-06 15:15 in BASIC Stamp
I have posted about making a tachometer for a school project but my teacher has asked for my class to consider using servos.
I was wondering if it would be possible to use a Gas pressure sensor with·a BS2 board. The idea that i had was to have a certain
amount of pressure that the sensor could allow until it would activate a servo that could open and close some type of valve in order to
release the pressure. Does parallax make a gas pressure sensor? i have been unable to find one on their website.·If anybody knows if this is possible
·please post your response. Thank you.

·········································· -Ron·

Comments

  • FranklinFranklin Posts: 4,747
    edited 2007-03-03 22:52
    Just what is your task? there are gas pressure sensors but you need to know what temperature and pressure you need to sense and what type of output the sensor will provide. Figure those out and get back to us. Good Luck

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  • Philip GamblinPhilip Gamblin Posts: 202
    edited 2007-03-04 02:24
    Servos aren't typically strong enough to open a valve. Have you used a Stamp to drive a servo?
  • rjdjrjdj Posts: 9
    edited 2007-03-05 04:37
    no i have no experience with servos
  • Capt. QuirkCapt. Quirk Posts: 872
    edited 2007-03-05 06:27
    What type of "GAS" are you refering to?, (gasoline).

    Also there are many ways to open or close a valve with a servo using gears from servo city.
  • rjdjrjdj Posts: 9
    edited 2007-03-05 19:43
    I was thinking of a gas such as C02 or helium.


    thanks for your post.


    -Ron
  • latigerlillylatigerlilly Posts: 114
    edited 2007-03-06 08:06
    http://forums.parallax.com/showthread.php?p=629159

    Look at my above post. It describes a water pressure sensor, but the sensor described could also be an air pressure sensor.

    A servo is not powerful enough to hold a stopcock in position against gas pressure. However, a continuous rotation servo is strong enough to turn a screw that could release gas pressure.
  • zenerzener Posts: 8
    edited 2007-03-06 14:55
    Gas pressure is gas pressure. I assume you will be using an inert gas so there is no possibility of an explosion.
    Jameco electronics has some inexpensive pressure sending units (transducers). 0-5 psi etc. They can be put through an A/D converter and read with a basic stamp.

    Depending on the valve, you can easily turn a small (low psi) valve with a servo. See edmund scientific for some small "low pressure" valves.

    ** Be very careful not to over pressure the vessel.** The larger the surface area, or vessel, the more dangerous it is and the less pressure you can use.

    After that, you can use some simple IF/Then statements in your code to control the valve on/off or proportionally.

    Good Luck!
  • slamerslamer Posts: 52
    edited 2007-03-06 15:15
    These guys probably make what your looking for.

    http://www.parker.com/indexv4.asp

    They deal with most of the HIGH pressure electric sensors and electric control·valves.



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