Buyer's Guide
Mixing & Agitation Equipment
A complete guide to laboratory mixing and agitation — hotplate stirrers, orbital shakers, vortex mixers, rockers, and rollers for every mixing application.
Understanding Mixing & Agitation Equipment
Nearly every laboratory workflow involves mixing — from dissolving reagents on a hotplate stirrer to growing bacterial cultures on an orbital shaker or quickly resuspending a pellet on a vortex mixer. The right mixing equipment ensures reproducible results, protects sensitive samples, and improves throughput.
This guide covers five categories of mixing and agitation equipment. Each type provides a different motion profile suited to specific applications, from gentle rocking for Western blot membranes to high-speed vortexing for rapid tube mixing.
Legacy Lab Supplies carries mixing equipment from authorized manufacturers including Benchmark Scientific and Yamato Scientific, with competitive pricing and full manufacturer warranty on every unit.
Hotplates & Magnetic Stirrers
Hotplate stirrers combine a heated ceramic or aluminum surface with a magnetic stirring drive. They dissolve solids, prepare media, and run heated reactions with precise temperature and speed control. Stirrer-only models provide mixing without heat. Multi-position models handle several vessels simultaneously for parallel work.
Temperature Range
Ambient to 380-500°C
Stirring Speed
60 to 1,500 RPM
Max Volume
Up to 20L (model dependent)
Plate Material
Ceramic, aluminum, or glass
Common Applications
- Media preparation
- Chemical dissolution
- Heated reactions
- Buffer preparation
Orbital Shakers
Orbital shakers provide circular agitation at controlled speeds for culturing, mixing, staining, and washing applications. Available as benchtop or floor-standing units, with options for temperature control (shaking incubators), refrigeration, and stackable platforms. Orbit diameter affects mixing intensity — larger orbits for flasks, smaller for microplates.
Speed Range
15 to 500 RPM
Orbit Diameter
10 mm to 50 mm
Capacity
1 to 12+ flasks or multiple plates
Timer
1 min to 999 hours (or continuous)
Common Applications
- Bacterial & yeast cultures
- Gel staining & destaining
- Solubility studies
- Cell suspension maintenance
Vortex Mixers
Vortex mixers provide rapid, high-speed orbital mixing of individual tubes by pressing the tube against a rubber cup or flat-top head. Touch-activated and continuous modes accommodate different mixing needs. Multi-tube adapters allow simultaneous vortexing of multiple samples for higher throughput.
Speed Range
0 to 3,000 RPM
Motion
Orbital (touch or continuous)
Accessories
Cup head, flat head, multi-tube adapters
Footprint
Compact benchtop (typically under 6 inches)
Common Applications
- Sample resuspension
- Reagent mixing
- Cell pellet disruption
- Quick tube homogenization
Rockers
Laboratory rockers provide a gentle tilting (see-saw) motion for applications requiring smooth, low-shear agitation. The adjustable tilt angle and speed control make them ideal for gel staining/destaining, hybridization, Western blot washing, and any protocol where vigorous mixing would damage samples or disrupt membranes.
Speed Range
1 to 100 RPM
Tilt Angle
0° to ±30°
Capacity
Up to 4 kg load
Motion
Variable-speed rocking
Common Applications
- Western blot washing
- Gel staining & destaining
- Hybridization protocols
- General low-shear mixing
Rollers & Rotators
Tube rollers and rotators provide continuous 360° rotation for blood tubes, hybridization bottles, and cell culture roller bottles. Adjustable speed and angle settings accommodate different vessel types and mixing requirements. Some models combine rolling with rocking for 3D mixing applications.
Speed Range
2 to 80 RPM
Motion
Continuous rotation or rocking/rolling
Capacity
6 to 36 tubes or 4+ bottles
Angle
Fixed or adjustable 0-30°
Common Applications
- Blood tube mixing
- Cell culture roller bottles
- Hybridization protocols
- Immunoprecipitation
How to Choose: Mixing Equipment Comparison
Compare motion types, throughput, and ideal applications across all five categories.
| Factor | Hotplate | Shaker | Vortex | Rocker | Roller |
|---|---|---|---|---|---|
| Motion Type | Magnetic spin + heat | Orbital circle | Rapid orbital | See-saw tilt | 360° rotation |
| Duration | Minutes to hours | Hours to days | Seconds | Minutes to hours | Hours to days |
| Best For | Dissolving + heating | Cultures & plates | Quick tube mixing | Blot washing | Blood tubes |
| Price Range | $200-$3,000 | $500-$8,000 | $100-$800 | $300-$2,000 | $300-$2,500 |
Key Specifications Checklist
Before purchasing mixing equipment, verify these specifications:
Frequently Asked Questions
What is the difference between a hotplate stirrer and a magnetic stirrer?
A magnetic stirrer provides mixing only, using a rotating magnet to spin a stir bar in your vessel. A hotplate stirrer combines magnetic stirring with a heated plate surface, allowing simultaneous mixing and heating. If you need to dissolve solids, prepare media, or run reactions that require both heat and agitation, a hotplate stirrer is the more versatile choice.
When should I use an orbital shaker versus a vortex mixer?
Orbital shakers provide gentle, continuous agitation for extended periods — ideal for bacterial cultures, staining protocols, and cell suspensions. Vortex mixers provide brief, high-speed mixing for individual tubes — perfect for quick sample resuspension, reagent mixing, and pellet disruption. Orbital shakers handle multiple vessels simultaneously; vortex mixers process one tube at a time.
What platform size do I need for an orbital shaker?
Platform size depends on your vessel types and quantity. For Erlenmeyer flasks, a standard platform accommodates 4-9 flasks (250-500 mL). For microplates, stackable platforms hold 2-4 plates. Measure your typical batch and add room for growth. Many shakers accept interchangeable platforms for different vessel types.
Are rockers and rollers interchangeable?
No. Rockers provide a gentle see-saw tilting motion and are used for hybridization, Western blot staining, and gel destaining. Rollers provide continuous 360° rotation and are used for blood tube mixing, hybridization bottles, and cell culture roller bottles. The motion type must match your application — rocking for wash and stain, rolling for continuous mixing.
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From compact vortex mixers to multi-position orbital shakers, we provide competitive pricing and manufacturer warranties on all mixing and agitation equipment.