Microplate reader selection: which detection modes you need, filter against monochromator optics, what the microplate reader vs spectrophotometer question turns on, 384 well plate compatibility, and where an elisa plate reader, an elisa microplate reader, a fluorescence plate reader, a fluorescence reader, a plate reader fluorescence channel, a spectrophotometer plate reader, a plate reader spectrophotometer, a microplate spectrophotometer, a fluorescence spectrophotometer and a multimode plate reader or multimode microplate reader each fit

Specifying the reader

1. List the modes you genuinely need. Absorbance covers colorimetric assays and nucleic acid quantitation; fluorescence intensity covers labelled assays; luminescence covers reporter and viability assays and needs a sensitive detector and good light exclusion. Time-resolved fluorescence and polarisation are specialist additions that should be bought for a named assay rather than for completeness.
2. Filters or monochromator. Filters transmit more light and give better sensitivity at their fixed wavelengths. A monochromator selects any wavelength and is far more flexible for method development, at a sensitivity cost. Laboratories running fixed validated assays usually want filters; laboratories developing assays usually want the monochromator, and hybrid instruments offer both.
3. Plate formats and physical fit. Confirm the reader takes every plate format the laboratory uses, including the deep well, low volume and 384 well plate types, and check plate height and skirt requirements. A reader that will not accept a plate the assay requires is a limitation nothing works around.
4. Shaking, temperature and injectors. Onboard shaking and incubation are needed for kinetic and cell-based work; reagent injectors are required for flash luminescence assays where signal decays immediately. Injectors add cleaning and maintenance, so buy them for an assay you actually run.
5. Software, export and integration. Check how raw data leaves the instrument, whether the analysis you need is included or extra, and whether the reader can be driven by an automation platform if that is the direction of travel. Data locked in a proprietary format is a growing problem.

Sensitivity claims and how to test them

Manufacturers publish detection limits under ideal conditions with their own plates and standards, and the figures are not comparable between makes. The only meaningful test is your own assay on the candidate instruments, which vendors will usually arrange.

Bring a weak sample as well as a strong one. Instruments separate on faint signals, and a demonstration with a bright standard tells you very little.

Plates are part of the measurement

Plate colour, material and well geometry change the signal: clear for absorbance, black for fluorescence, white for luminescence, and low-volume geometries for small samples. A good reader with the wrong plate produces poor data.

Keep the plate type in the method description. Changing plate supplier is a method change and should be bridged, since well geometry and surface treatment vary more than the catalogue suggests.

Common questions

Filters or monochromator in a plate reader?

Filters give better sensitivity at fixed wavelengths and suit fixed validated assays. A monochromator selects any wavelength and suits method development, with some sensitivity cost. Hybrid instruments carry both.

Which detection modes do I need?

Absorbance and fluorescence intensity cover most routine work; luminescence needs a sensitive detector and good light exclusion. Time-resolved fluorescence and polarisation should be bought for a named assay, not for completeness.

Will it take 384 well plates?

Check explicitly, along with deep well, low volume and any specialist format you use, including plate height and skirt requirements. Format compatibility is a hard limit.

Do plate colour and material matter?

Considerably. Clear plates for absorbance, black to reduce crosstalk in fluorescence, white to maximise signal in luminescence. The plate is part of the measurement and a change of supplier is a method change.

Browse by service class

• Compare Gene synthesis on advertised prices