I work at a WWTP which has a single conveyor feeding a 4 ft deep hopper which diverts the sludge "cake" to one of two moyno pumps. The hopper has a steady vibration so the sensors have been mounted from the sidewalls to keep the vibration from effecting their operation. This system is currently using Banner T30UUPBQ level sensors mounted 12 inches above the hopper to determine the level in the hopper. The sensor output is 0 - 10 VDC and is sent to a A/B Micrologix 1400 controller to determine what speed the Toshiba G7 drive should run at to empty the hopper. The "cake" is basically the consistency of mashed potatoes and forms a cone shape against one side of the hopper after it falls off the conveyor. The Banner sensor is not working very well in this application. Can anyone recommend a good sensor capable of indicating the hopper level for this application? The sensor cannot touch the "cake" as it leaves a stick residue on whatever it touches. Probes cannot be used as "hammers" are used to help force the product into the moyno pumps.:001_huh:
Hopper Level Help Needed
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Load cells.
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sonic on top
or nuclear on both sides
or nuclear on both sides
We use these for similar applications in our plant
http://www.automation.siemens.com/m.../ultrasonic/transmitters/Pages/the-probe.aspx
http://www.automation.siemens.com/m.../ultrasonic/transmitters/Pages/the-probe.aspx
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Are you permitted to use nuclear across an open hopper? The only place I have ever seen them used is on a closed tank.
Hopper Level
We do not want to use nuclear. I have been looking at a few models from Flowline and Endress Hauser. We have not used any of Flowline's products and have limited experience with Endress Hauser. I am open for suggestions/comments regarding these two brands (or others.) Thanks.:thumbsup:
We do not want to use nuclear. I have been looking at a few models from Flowline and Endress Hauser. We have not used any of Flowline's products and have limited experience with Endress Hauser. I am open for suggestions/comments regarding these two brands (or others.) Thanks.:thumbsup:
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We use Rosemount guided wave for most things but when it can't touch the process for whatever reason we use the non contacting radar level transmitters. They aren't cheap though.
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So the entire hopper gets weighed? I'm sure that would require a complete redesign.
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I didn't read the OP too carefully and yes it would at least have to have a cage over it to keep folks/critters out of the beam
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Yes a scale system would work as long as not piping or conduit touched the hopper.
They even make load cells that can be attached to the structure and measure the steel being compressed during loading, if extreme accuracy is not needed.
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Non - contacting radar with filtering software can do crap loads.
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