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Home > Archive > Electrical Engineering > June 2006 > Sludge Blanket Levels?
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Sludge Blanket Levels?
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| BIGEYE 2006-06-07, 1:21 pm |
| Has anyone had success in measuring sludge blanket levels in Picket Fence
Thickeners as used in the waste water industry?
I have tried single point level detection using light, very little success
with this, and quite often the sensor gets caught in the rake. I am now
using ultrasonic and getting better results. This way I get a continuous
level measurement. However, blanket level detection is sometimes unreliable.
Is there anything better I should consider for this application?
TIA
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| Jerry Avins 2006-06-07, 2:21 pm |
| BIGEYE wrote:
> Has anyone had success in measuring sludge blanket levels in Picket Fence
> Thickeners as used in the waste water industry?
> I have tried single point level detection using light, very little success
> with this, and quite often the sensor gets caught in the rake. I am now
> using ultrasonic and getting better results. This way I get a continuous
> level measurement. However, blanket level detection is sometimes unreliable.
> Is there anything better I should consider for this application?
> TIA
I've asked the staff at my local sewerage authority if that have a
suggestion for you. I'll forward a response if it's pertinent.
Jerry
--
Engineering is the art of making what you want from things you can get.
ŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻŻ
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| Cameron Dorrough 2006-06-07, 8:21 pm |
| "BIGEYE" <invalid@notathome.com> wrote in message
news:4486f67f$0$30722$fa0fcedb@news.zen.co.uk...
> Has anyone had success in measuring sludge blanket levels in Picket Fence
> Thickeners as used in the waste water industry?
> I have tried single point level detection using light, very little success
> with this, and quite often the sensor gets caught in the rake. I am now
> using ultrasonic and getting better results. This way I get a continuous
> level measurement. However, blanket level detection is sometimes
> unreliable.
> Is there anything better I should consider for this application?
> TIA
All the plants I've seen use ultrasonic. Hawk (www.hawklevel.com) make a
range of ultrasonic level transmitters for waste-water applications and
they're very easy to set up and pretty reliable.
Another option is something from Drexelbrook. They have a wide range of
contact-type magnetostrictive transmitters which can discriminate between
the blanket and the water underneath and it might be worth talking to one of
their reps..
HTH,
Cameron:-)
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