M
I am looking for a pulse-output flow sensor to work in the following scenario: I am injecting a 5% NaOH solution into a flow stream with a piston-type (HPLC) pump at high pressures and variable rates, with pH as a primary feedback variable. Flow rates range from about 20 to 100 ml/min. I
would like to have a totalizer as well as a time-integrated rate indication. I am considering a paddlewheel or similar sensor, but I am not certain of the applicability. First, the high pressures (30 bar) in the output stream eliminate most sensors I've seen. Would metering the pump feed work equally as well or pay I encounter excessive pressure drop to the pump inlet?
Second, because the pump output it periodic rather than continuous, I am wondering if a paddlewheel sensor would have the dynamic response to accurately account for everything going through it, at least to some nominal
accuracy of, say, 2%?
Any suggestions? What about other types of pumps that would survive the environment and produce relatively high pressures?
Mark Ludlow
would like to have a totalizer as well as a time-integrated rate indication. I am considering a paddlewheel or similar sensor, but I am not certain of the applicability. First, the high pressures (30 bar) in the output stream eliminate most sensors I've seen. Would metering the pump feed work equally as well or pay I encounter excessive pressure drop to the pump inlet?
Second, because the pump output it periodic rather than continuous, I am wondering if a paddlewheel sensor would have the dynamic response to accurately account for everything going through it, at least to some nominal
accuracy of, say, 2%?
Any suggestions? What about other types of pumps that would survive the environment and produce relatively high pressures?
Mark Ludlow