Re: [AVR-Chat] Sensor
2009-05-14 by Muhammad Amiruddin
If we use a pressure sensor, first idea on my head is a load cell, but i have experience with a load cell, it need a diff amp , little movement of the load cause so many noise and ripple on diff amp output, how to minimize that ? --- On Wed, 5/13/09, Bruce Parham <obparham@jpl.nasa.gov> wrote:
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From: Bruce Parham <obparham@jpl.nasa.gov>
Subject: Re: [AVR-Chat] Sensor
To: "AVR-Chat@yahoogroups.com" <AVR-Chat@yahoogroups.com>
Date: Wednesday, May 13, 2009, 3:09 PM
I like the method used in most washing machines where they place a pressure
sensor above the liquid and run an open ended tube down to the bottom. That
keeps the sensor and electronics dry.
Given that water pressure = 1.363 PSI/m, a 15 m water head will produce
1.363 PSI/m x 15 m = 20.45 PSI. A 25 to 30 PSI full scale sensor should do
the trick.
Bruce
>> I think the best non-movement sensor would be a presure sensor at
>> the bottom of the tank. No moving parts and it can be sealed. So it
>> could measure many liquids.
>>
>> Brian
>>
>> --- In AVR-Chat@yahoogroup s.com, Muhammad Amiruddin
>> <amiruddin.muhammad @...> wrote:
>>> Dear all,
>>>
>>> please help me,
>>>
>>> i want make project for measuring the level of water on the tank
>>> that approximately 15 m high. what senssor that i should use ?
>>>
>>> Is there any ultrasonic senssor wich can measure range until 15 m ?
>>>
>>> rgds,
>>>
>>> 4mir
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