Heated Microplate Shaker Buying Guide: How to Choose the Right One for Your Lab

A heated microplate shaker (also called a microplate shaker incubator or plate thermoshaker) mixes 96- or 384-well plates on a small orbit while holding them at a set temperature. To choose the right one, compare six things: how many plates you run at once, orbit size and speed range, temperature range and uniformity, whether the lid is heated, how tall a plate it accepts, and how flexible the controls are during a run.

This guide walks through each of those in plain terms, explains why microplates behave differently from tubes and flasks, and ends with a side-by-side comparison to help you size a unit for your lab.

What a heated microplate shaker does (and what it doesn't)

Many lab protocols need two things at once: steady agitation so reagents keep reaching the well surface, and a stable temperature so reaction rates stay consistent. ELISA incubations, enzyme assays, bead-based cleanups and resuspension in deep-well blocks are common examples. A heated microplate shaker does both on one small benchtop platform.

It helps to know how it differs from similar equipment:

• Plate vortexer (unheated): mixes plates quickly but at room temperature. Good for short mixing steps, not for timed incubations.
• Incubator shaker for flasks: a large cabinet with a 19–25 mm orbit built for culture flasks. Its speed ceiling is too low to mix small well volumes effectively.
• Block thermo-shaker: uses swappable metal blocks for tubes or a single plate. Ideal if you work mostly with microtubes rather than several plates at once.
• Plain plate incubator: holds temperature but doesn't mix, so reagents rely on diffusion alone.

Why microplates need a small orbit and high speed

Liquid in a microplate well is a tiny volume held in place by surface tension. On a gentle, wide orbit, it barely moves. It takes a small, fast orbit to actually set the liquid in each well in motion.

That is why shaker manufacturers pair orbit size with speed. Published guidance on shaker orbits notes that the smaller the orbit, the higher the speed a shaker can safely run, and that small orbits of around 3 mm are the ones intended for fast mixing in small tubes and plate formats, while 19–25 mm orbits run at only a few hundred RPM for flask culture.^[1]

In practice, look for an orbit in the 1.5–3 mm range with a top speed well above 1,000 RPM. A slightly larger orbit (around 3 mm) moves more liquid per revolution, which helps with deep-well plates and viscous reagents; the trade-off is that it splashes sooner at very high speeds, so you tune speed rather than always running at maximum.

Seven things to check before you buy

1. Plate capacity

Count the plates you need to incubate at the same time, not per day. If your typical assay is one or two plates, a 2-position unit keeps your bench clear. If you routinely run four plates of samples and standards together, a 4-position unit saves you from staggering runs, which is where timing errors creep in.

2. Orbit size and speed range

As above: small orbit, high top speed, and fine speed adjustment. Many assay kits specify a shaking speed, so check that the unit covers it and lets you set it precisely. Coarse steps (for example, 10 or 50 RPM at a time) make it hard to match a written protocol exactly.

3. Temperature range, accuracy and uniformity

Most plate protocols run between room temperature and 37°C, with some steps (enzyme inactivation, certain hybridization or sample-prep steps) going higher. Check three numbers:

• Maximum temperature: does it cover your hottest step with some margin?
• Accuracy and uniformity: ideally within ±0.5°C, and across the whole platform, not just at the sensor.
• Heat-up time: faster heat-up means less waiting between prep and the start of the incubation.

Also check the minimum temperature. Heated shakers without active cooling can only hold a few degrees above room temperature. If you need 4°C or 20°C in a warm lab, you need a unit with Peltier cooling instead.

4. A heated lid (evaporation and edge effects)

This is the feature buyers most often overlook. When only the base is heated, the top of the plate and its seal stay cooler. Moisture evaporates from the wells and condenses on the underside of the seal, and outer wells tend to lose more volume than inner ones. That uneven evaporation, along with temperature differences between edge and center wells, is a major cause of the "edge effect," where border wells read differently from the middle of the plate.^[2]

A heated lid warms the plate from above as well as below, which keeps condensation off the seal and evens out temperature across the plate. For incubations longer than about 30 minutes, it makes a noticeable difference in consistency.

5. Plate height clearance

Measure your tallest labware before you buy. Standard and PCR plates are low-profile, but deep-well blocks and some reservoirs are much taller. The lid has to close over them, so the maximum plate height in the spec sheet decides whether your deep-well work fits at all.

6. Controls during a run

Two control details save real time:

• Adjusting on the fly: being able to change speed, time or temperature without stopping and restarting the run.
• Independent timing per position: on larger units, this lets you add or remove plates at different times without interrupting the others, which suits shared core facilities.

A long timer range also matters if you run overnight incubations.

7. Footprint and motor

Check the bench space against the dimensions, and prefer a brushless DC motor, which runs quietly and doesn't need brush replacement over years of continuous use.

2, 4 or 6 positions? A side-by-side comparison

To make the trade-offs concrete, here is how the three sizes in the Novara™ heated microplate line compare. All three use a 3 mm horizontal orbit, a heated lid over a heated base, PID temperature control with 0.1°C setting increments, and speed settable in 1 RPM steps.

Feature	HPS2	HPS4	HPS6
Plate positions	2	4	6
Speed range	200–1,600 RPM	200–1,350 RPM	200–1,600 RPM
Temperature range	Ambient +5°C to 80°C	Ambient +5°C to 80°C	Ambient +5°C to 100°C
Heat-up time	RT to 80°C in ≤10 min	RT to 80°C in ≤12 min	RT to 100°C in ≤20 min
Max plate height	22 mm	50 mm	50 mm
Timing	Shared run timer	Shared run timer	Independent timer per position
Best fit	Small labs, one or two standard or PCR plates per run	Routine multi-plate assays and deep-well work	Core facilities, staggered runs, steps up to 100°C

A few things stand out. The Novara HPS2 is the most compact and reaches 80°C in 10 minutes or less, but its 22 mm clearance suits standard and PCR plates rather than tall deep-well blocks. The Novara HPS4 doubles the capacity and adds the height for deep-well plates, at the cost of a slightly lower top speed. The HPS6 is the choice when you need to go above 80°C or let several users load and unload plates on their own schedules.

Novara HPS2

2 plates · up to 80°C · 22 mm clearance

View product

Novara HPS4

4 plates · up to 80°C · 50 mm clearance

View product

Novara HPS6

6 plates · up to 100°C · 50 mm clearance

View product

Tips for consistent results on any plate shaker

1. Pre-warm before you load. Let the unit reach set temperature before plates go in, so the incubation clock starts at the right temperature.
2. Seal your plates. Use an adhesive or heat seal suited to your assay, and press it down firmly over every well, especially the outer rows.
3. Start with your kit's speed, then check. If a protocol specifies a speed, use it. If not, increase speed gradually and watch for liquid reaching the seal; back off once you see splashing.
4. Load plates evenly. On multi-position units, distribute plates symmetrically rather than stacking all the weight on one side.
5. Use outer wells wisely. For long incubations, many labs place blanks or buffer in the outermost wells as an extra guard against edge effects.
6. Verify temperature occasionally. Check the platform with a calibrated probe as part of routine equipment QC, particularly for validated SOPs.

Which setup fits your lab?

• You run one or two ELISA or enzyme-assay plates at a time: a 2-position heated shaker such as the HPS2 is usually enough.
• You run several plates together, or use deep-well blocks: go with 4 positions and at least 50 mm of clearance, like the HPS4.
• Several people share the unit, or you need up to 100°C: a 6-position unit with independent timers, like the HPS6.
• You mostly work with microtubes rather than plates: a block-based thermo-shaker such as the Novara Duo Thermo-Shaker is a better fit.
• You only need fast mixing, no heat: an unheated plate vortexer like the Novara MPV7 costs less and takes less space.

Frequently asked questions

What is the difference between a microplate shaker and a heated microplate shaker?

A standard microplate shaker only mixes at room temperature. A heated microplate shaker adds temperature control, typically from a few degrees above ambient up to 80–100°C, so you can mix and incubate in one step.

Can I use a regular orbital shaker for microplates?

You can place plates on one, but most orbital shakers use a 19–25 mm orbit with a low speed limit, which barely moves the small volume in each well. A dedicated plate shaker with a small orbit and higher speed mixes wells far more effectively.

What speed should I use for an ELISA?

Follow the speed in your kit's instructions, since it was validated with that assay. If none is given, start at a moderate speed and increase until the liquid in each well is visibly moving without reaching the seal.

Do I really need a heated lid?

For short mixing steps, no. For incubations longer than about 30 minutes, a heated lid reduces condensation on the plate seal and helps keep edge and center wells at the same temperature, which improves well-to-well consistency.

Can a heated microplate shaker cool samples?

Not unless it has active (Peltier) cooling. Heat-only units like the HPS series hold temperatures from about 5°C above room temperature upward.

Still deciding which size fits your workflow? Compare the full range of Novara vortex mixers and plate shakers, or contact our team with your plate types and protocol and we'll help you choose.