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from the Automation List department...
monitoring water level
Sensor technologies. topic
Posted by baby_jones on 2 November, 2007 - 5:00 pm
I just wanna ask, what if i'm going to monitor a water level in an open space so it's prone to any weather might have,so what will i'm going to use to have an accurate result 'coz at certain level of water I have another task to do but then water level monotoring would stull continue..
I need your opinion.


savirmer@yahoo.com


Posted by Walt Boyes on 5 November, 2007 - 3:54 pm
Well, all things considered, a submersible pressure transducer is your best option, and it should have some damping because "weather" in an open space generally implies wave action or surface turbulence on the top of the liquid. Ultrasonics and radar will have issues with wind, if there is any, and floats are problematic due to "weather" and the potential for debris.

Walt Boyes
Editor in Chief
Control magazine
www.controlglobal.com
blog:Sound OFF!! http://www.controlglobal.com/soundoff _________________

Putman Media Inc.
555 W. Pierce Rd.
Suite 301
Itasca, IL 60143
630-467-1301 x368
wboyes@putman.net


Posted by Dave Schlafer on 6 November, 2007 - 8:25 pm
We have used ultrasonic in a PVC pipe acting as a stilling well. Has worked great for many years, helps eliminate proplems with hardware in the water.


Posted by Walt Boyes on 7 November, 2007 - 3:13 pm
Yep, that works. Costs more, and uses more power too, but has the advantage of non-contact measurement.

Walt Boyes
Editor in Chief
Control magazine
www.controlglobal.com
blog:Sound OFF!! http://www.controlglobal.com/soundoff
_________________

Putman Media Inc.
555 W. Pierce Rd. Suite 301
Itasca, IL 60143
630-467-1301 x368
wboyes@putman.net

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