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
Sludge Blanket Levels?
Jun 07, 2006
2 Replies
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
All the plants I've seen use ultrasonic. Hawk
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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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