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Measuring liquid polymer level in a 1500 gallon High-density linear polyethylene conical tank with a mixer in the center and pump discharge in the bottom. This level will also be a permissive for the transfer pumps.
The operators mix 1000-1500 gallons of water with the calculated amount of powdered polymer in this tank. The motor powered mixer makes a large vortex in the tank and creates a significant amount of surface disruption including bubbles and foam at times. After the mixing time is complete the operators stop the mixer and start the transfer pumps. They would like to have high and low level switches and a tank level. They do not need a volume measurement, tank distance will be OK. We have tried a drexilbrook us-2x to some success but we have experienced loss of echo. We also tried a outside mounted non-contacting capacitance level switch for the low level. However after some use the tank has a build-up of polymer and the level switch no longer works reliably. There is not much clearance inside of the tank with the huge mixer and the operators are uncomfortable with us adding taps to the sides of the tank. The only tap is also used for pump suction. My next idea was to look at using some type of flow switch to shut down the pumps on low level, but I am open to suggestions.
Please dive into your experience and give me some suggestions.
Thanks,
Aaron M. Webster
The operators mix 1000-1500 gallons of water with the calculated amount of powdered polymer in this tank. The motor powered mixer makes a large vortex in the tank and creates a significant amount of surface disruption including bubbles and foam at times. After the mixing time is complete the operators stop the mixer and start the transfer pumps. They would like to have high and low level switches and a tank level. They do not need a volume measurement, tank distance will be OK. We have tried a drexilbrook us-2x to some success but we have experienced loss of echo. We also tried a outside mounted non-contacting capacitance level switch for the low level. However after some use the tank has a build-up of polymer and the level switch no longer works reliably. There is not much clearance inside of the tank with the huge mixer and the operators are uncomfortable with us adding taps to the sides of the tank. The only tap is also used for pump suction. My next idea was to look at using some type of flow switch to shut down the pumps on low level, but I am open to suggestions.
Please dive into your experience and give me some suggestions.
Thanks,
Aaron M. Webster