Does anyone one have a reasonably accurate algorithm to calculate the volumetric flow out of a lift station when the only parameters you have are level and when the pumps are running? There are no influent or effluent flow meters so I need to have a way to compensate for influent while I am pumping it would be one thing if it was a batch system but the flow in is always changing and a pumping cycle begins when the level has hit a preset limit. I know how to calculate the flow out using level and volume so please don’t respond with that. I have seen ultrasonic level meters like Milltronics that have discrete inputs that will do the calculation but I need to do it in my PLC. Thanks!