Eldex Optos and HP Series pumps are reciprocating piston-style pumps, meaning the pump fluid chamber is static. Therefore, at a constant stroke, the same amount of fluid is delivered to each pump—this means reproducibility is very high by design.
Our Optos Series pump is a single-piston pump, so there is some pressure fluctuation as the pump transitions from the pump part of the piston stroke to the refill pare. A pulsation damper/pressure transducer can control this.
Learn how to extend the life of a reciprocating piston pump.