Flow cytometers

Buying guide

What settles a flow cytometer purchase before anything else is the optical configuration, specifically how many lasers and detectors the instrument carries, because that number fixes how many markers can be read at once. A buyer running a four-colour immunophenotyping panel needs different hardware from one building a twenty-parameter panel for rare-event detection, and no amount of software compensates for a detector that is not there. Read the excitation wavelengths and the number of fluorescence channels first, then work outward to sample throughput, carryover between samples, and whether the plumbing handles the sample volumes a protocol actually uses.

Whether the instrument sorts or only analyses is the second question, and it changes the machine entirely. A cell analyser reads a population and discards it; a cell sorter physically diverts selected cells into tubes or plates for downstream culture, sequencing or protein purification. Sorters carry nozzles, deflection plates and far more fluidics to maintain, which is why they sit at the upper end of the price range and why their condition matters more. On a used sorter, verify the state of the fluidics and the optical alignment, ask for a recent performance report using calibration beads, and establish how many hours the lasers have run, since solid-state lasers degrade and replacements are a significant line item. Carryover testing and a stream-stability check tell a buyer more about a used cell sorting system than the datasheet ever will.

The price band on these systems is wide, and condition is the main thing moving a unit within it. Entry here is low enough that small consumables and parts sit near EUR 18, while a fully optioned multiparameter sorter reaches EUR 159.265. The average listing sits at EUR 24.474. What a flow cytometer costs on the secondary market tracks laser count, sorting capability and age more than brand, so a buyer with a fixed budget is usually choosing between an older high-specification analyser and a newer entry-level one. Used and refurbished units are listed for sale below the price of new, which is what makes a well-documented secondhand analyser the affordable route into high-parameter work. The brands that dominate the listings, led by BD and Beckman Coulter, are the ones most worth comparing on documented service history rather than on name.

Types of Flow cytometers

Which flow cytometer types are listed?

Among the listings that specify a type, the catalogue divides into analysers and sorters, with several form factors in between. A benchtop flow cytometer is the compact, fixed-optics workhorse of the clinical and research lab, sized to sit on a bench and run routine immunophenotyping, cell counting and viability assays. A cell analyzer reads a sample and reports its population profile without recovering the cells, which suits high-throughput screening where the readout is the endpoint. A cell sorter adds the hardware to physically isolate selected cells, feeding single-cell genomics, clonal expansion and cell culture downstream. Multiparameter flow cytometers carry the laser and detector count for deep panels, and a cell analysis system bundles the instrument with its acquisition and analysis software as one platform.

These types do the central measurement work of flow cytometry across cell biology, immunology and molecular diagnostics. A benchtop flow cytometer for immunophenotyping is a common clinical configuration, reading surface markers on blood and bone marrow samples. A cell sorter for single-cell genomics isolates defined populations ahead of sequencing, and a multiparameter flow cytometer for immunology research supports the high-colour panels used to map immune cell subsets. The technique is also used for apoptosis assays, cell cycle analysis and the quantification of fluorescent reporter proteins in synthetic biology and gene editing workflows. Across all of them the fluorescence channel count, not the chassis, determines what a given unit can actually resolve.

The brands behind the flow cytometer listings

The listings are led by BD, Beckman Coulter, BD Biosciences, Miltenyi Biotec, Invitrogen. For a buyer, that concentration matters in practical ways. Instruments from the dominant makers are the easiest to compare, because multiple units of the same model appear and their specifications line up directly. Parts and consumables for widely sold platforms are more readily available, and matching a used body to the sheath fluid, tubes and software it needs is simpler when the model is a common one. Less common makers can offer a capable instrument at a lower price, at the cost of harder comparison and thinner parts availability. Parts for any listed unit can be sourced via Questpair.

What a used flow cytometer costs here

Of the catalogue, 100 percent of the listings are used. Prices span from EUR 18 to EUR 159.265, with an average of EUR 24.474. That spread covers everything from individual tubes and replacement parts at the low end to fully configured multiparameter sorting systems at the top, which is why a single average tells a buyer less than the position of a specific model within the range. Used and refurbished analysers and sorters are listed below new pricing, and warranty on any given unit is arranged in consultation for that specific listing.