Choosing a live-cell imaging system

Choose the vessel workflow first

For repeated observations of one field, the benchtop digital microscope offers a single imaging position. For several fields or wells, choose a motorised multiposition system. The compact imager is available with different objective and fluorescence configurations; the interchangeable-objective system lets you change between 2×, 4× and 10×. Neither description should be read as a guarantee that an arbitrary plate or holder will fit.

The dual-vessel and six-vessel systems are relevant when you need independent cultures in the same experiment. Capacity is holder-dependent: send the vessel manufacturer, format and dimensions before treating “two” or “six” as a confirmed configuration. More positions, z-planes and channels also lengthen an acquisition cycle. Confirm that the complete schedule fits your required time interval.

For culture expansion in multilayer vessels, the dedicated monitor images the bottom layer of vessels with up to ten layers. It does not provide images of every layer. Use bottom-layer observations as a defined sampling strategy, and establish whether they represent the rest of your culture.

Match field of view and fluorescence to the readout

Low magnification gives context for growth and confluence; higher magnification can reveal smaller structures but covers less culture area per field. For example, the dual-vessel and six-vessel systems list fields of view of 2.0 × 1.5 mm at 4× and 0.5 × 0.4 mm at 20×. Check whether you need representative fields or stitched coverage. Objective magnification alone does not establish optical resolution.

Brightfield can support morphology, confluence and wound-area measurements without a fluorescent label. Fluorescence adds a labelled readout, but “green” or “red” is not enough to confirm dye compatibility. Send the fluorophore and excitation/emission requirements, then compare them with the exact filter set. Compact and benchtop variants use configuration-specific channels; do not assume they have the two-channel configuration of the larger systems.

For a long experiment, evaluate exposure, acquisition interval and focus on the actual cells. A software feature such as autofocus, stitching or cell counting needs a sample-specific check. A fluorescence count derived from images is also a different measurement from the concentration of a suspension measured in a counting chamber.

Check the complete incubator installation

Measure usable shelf width, depth and height, door clearance and cable access. Include the holder, loaded vessel and any cable bend rather than comparing the instrument body alone. The listed recommendation of an incubator above 170 L for the dual-vessel system or above 230 L for the six-vessel system is only an initial screen; usable clearance must still be checked.

Confirm the operating environment, cleaning method, external computer and data exports with the chosen configuration. Ask for an example image and exported result relevant to your assay. Before ordering, establish which holder, objectives, fluorescence options, software functions and computer are included, and which installation, training and service arrangements are available.