Microplate readers

Buying guide

The decision usually starts with detection mode, because it is the one specification a reader cannot work around after purchase. An absorbance-only instrument reads colorimetric and turbidity assays and nothing else; a fluorescence reader adds excitation and emission optics; a luminescence reader needs a light-tight path and sensitive photon counting. A multi-mode platform combines these, often with the option to add modules later. Match the mode to the assays actually run in the lab, not to the ones that might be run someday, since the optics and detectors that distinguish these classes set both the capability and the price.

Beyond mode, a buyer weighs the optical system itself. Filter-based readers use fixed bandpass filters and tend to be more sensitive for a given wavelength; monochromator-based readers select wavelengths electronically and cover a continuous range, which suits labs that change assays often. Read speed, well format support, and whether the unit handles kinetic or endpoint reads matter where throughput is the constraint. Injectors and temperature control turn up on instruments built for live-cell and enzyme kinetics, and their presence or absence is worth checking against the datasheet before committing.

On a used reader the verification shifts to condition, since optical and fluidic components wear in ways a photograph does not reveal. Confirm that the lamp or LED source is within its service life, that filter sets for the intended assays are present and not degraded, and that the detector still reaches its specified sensitivity. Where injectors are fitted, their lines and pumps are the first thing to inspect, as they clog and leak. A recent calibration record, or the ability to recalibrate, settles most of the remaining doubt. Warranty on a used unit is arranged in consultation for the specific listing.

Price tracks capability closely here. A basic absorbance reader occupies the lower end of the range, while a fully optioned multi-mode instrument with injectors and incubation sits near the top, and the average of EUR 7.258 reflects a catalogue weighted toward mid-range used units. For buyers working to a budget, the refurbished and used instruments listed for sale cost well below new equivalents, which is what makes a 94 percent used catalogue the practical starting point. The brands that dominate the listings, led by Molecular Devices, BioTek, PerkinElmer, Tecan, BMG Labtech, each occupy recognisable tiers, and knowing where a model sits in its maker's line helps a buyer judge whether an asking price is fair.

Types of Microplate readers

Which microplate reader types appear in the listings?

Among the listings that specify a type, the split follows detection mode first. A single-mode absorbance reader, also called an absorbance microplate reader, measures how much light a sample transmits at set wavelengths, the workhorse for ELISA endpoints, protein and nucleic acid quantification, and bacterial growth curves in microbiology. Fluorescence microplate readers detect emitted light after excitation, reaching far lower analyte concentrations, which is why they anchor immunoassay development, cell imaging readouts and gene-expression reporter work. Luminescence readers count photons from a reaction with no excitation source, the format behind reporter-gene assays, ATP viability tests and many high-sensitivity molecular diagnostics panels. Multi-mode microplate readers fold two or more of these into one instrument, and they are the type a buyer reaches for when a single lab runs across cell culture, proteomics and electrophoresis-adjacent quantification without wanting a separate box for each.

The field these instruments serve is broad across biotechnology and life sciences. Plate-based detection underpins high-throughput screening in drug discovery, enzyme-kinetics measurement in biochemistry, and the quantitative steps that follow protein purification. In cell culture and cell imaging laboratories a multi-mode reader with incubation and injectors supports live-cell assays; in genomics and synthetic biology workflows the same optics quantify reporter output from engineered constructs. A microplate reader for ELISA, a fluorescence plate reader for cell viability, and a luminescence reader for reporter-gene assays each describe a distinct instrument matched to a distinct experiment.

The brands behind the microplate reader listings

The most listed makers are Molecular Devices, BioTek, PerkinElmer, Tecan, BMG Labtech. Their prominence matters to a buyer in practical terms: widely sold platforms have more models to compare side by side, a deeper pool of used units to choose from, and better availability of filter sets, lamps and injector consumables. Instruments from the heavily represented lines also tend to have documented specifications a buyer can verify against, which makes judging a used unit's sensitivity and condition more straightforward than it is for a rare model. Parts for these readers can be sourced via Questpair.

What a used microplate reader costs here

Condition in this catalogue runs strongly toward pre-owned equipment: 94 percent of the listings are used. Prices span from EUR 1 to EUR 107.611. That range covers everything from a basic absorbance unit at the entry end to a fully optioned multi-mode platform with injectors and temperature control at the top, with the average settling at EUR 7.258. The used and refurbished instruments are listed below the price of new equivalents, which is the single comparison the condition split supports.