Description
Continuous pump system is an option that links two pumps so they generate a continuous liquid flow: while one pump aspirates, the second pump delivers the solution. Passive valves in the connecting lines ensure correct flow direction throughout the cycle. The same arrangement can be used to form linear concentration gradients; for that application two LA-100 pumps equipped with the gradient option are required. The pumps are programmed so that one unit steadily reduces its rate while the second increases its flow rate, producing a gradient from solution A to B from 0–100 % at constant overall flow. In gradient mode continuous operation is not available, and the maximum gradient volume equals twice the syringe volume. Scope of delivery comprises the interconnection cable between the pumps and the tubing lines with valves. Offered as one piece from manufacturer Landgraf HLL, this accessory supports dual-pump continuous delivery and controlled gradient formation in laboratory fluid systems. It is classified among accessories and spare parts for laboratory equipment.
This article is part of Laboratory glass thermometers, in Temperature measurement.
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Questions about Continuous pumping system
What is this article?
Continuous pumping system is the article on this page. Luminix Health distributes Landgraf HLL for laboratory use. It sits in Pumps (other) & accessories, inside Pumps, vacuum & evaporation, in Lab instruments.
These are the pumps and fittings that are not a vacuum pump, a peristaltic pump or a drum pump. Flow, pressure and chemical compatibility of the wetted parts remain the three questions.
A vacuum pump lowers the pressure above a liquid so it boils at a lower temperature. That is the point of a rotary evaporator: solvent leaves a sample without cooking it. A diaphragm pump or a rotary-vane pump is chosen by the vacuum it reaches and by whether solvent vapour will destroy it. A peristaltic pump moves liquid by squeezing a tube, so the liquid touches only the tube. A barrel pump transfers a larger volume from a drum. The glassware on the evaporator is indexed under ISO laboratory glassware. Solvent identity is on PubChem.
Which category should I open next?
The category is Pumps, vacuum & evaporation. The sub-category is Pumps (other) & accessories. The catalogue is Lab instruments.
Shelves beside this one are Vacuum pumps, Rotary evaporators, Peristaltic & dosing pumps, Vacuum & pump accessories and Drum, barrel & transfer pumps.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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We deliver across the EU, usually within two to five working days. More is on Delivery across the EU. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.








