The PZ Series pulse metering pumps from Neptune Chemical Pump Co. provide accurate, reliable injection of a variety of liquids including chemicals, fertilizers and disinfectants. Flow rate and accuracy are unaffected by fluctuations in voltage. The pumps will operate on any single-phase voltage from 94-264 VAC. They are available in manual control, external input and programmable models. Models PZD-32/52 and all PZiG models have built-in calibration and allow accurate direct entry of feed rate in milliliters per minute. Flow Checker is available to measure flow on smaller models. All control features are on board every programmable model pump.