Solenoid dosing pumps have been the mainstay for chemical dosing applications within swimming pool water treatment over the last several decades from dosing of sodium hypochlorite or calcium hypochlorite for disinfection and hydrochloric acid for pH correction.

Initially dosing pumps employed stroke length adjustment to alter output by reducing the volumetric stroke per pulse and then manual speed in addition to regulate the stroke frequency, ie/ number of strokes per minute.

In the last 2 decades dosing pumps have seen tremendous developments that include digital displays highlighting flow rate in lph or ml/hr making them easier to use within all chemical metering applications, to automatic degassing heads or valves for sodium hypochlorite. Lutz Jesco Memdos Smart LBX/LDX variable speed stepper motor dosing pumps offer quieter, smoother and almost continuous dosing for chlorine & acid with our Memdos Smart LDX 2 model is proving to be an ideal pump for dosing PAC down at 2.5ml/hr.