Globe Scientific

Magnetic Stirrers

<h2>What Are Laboratory Magnetic Stirrers?</h2>
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A laboratory magnetic stirrer uses a rotating permanent magnet or electromagnet installed below a flat work surface to create a spinning magnetic field above the plate. A PTFE (polytetrafluoroethylene)-coated magnetic stir bar placed inside a vessel couples to this field and rotates, mixing the liquid from within. Because there is no physical contact between the stirrer and the contents of the vessel, the technique is contamination-free, amenable to closed-vessel operation, and compatible with corrosive, biological, and hazardous reagents. Magnetic stirrers are used without heating for buffer and media preparation, titrations, pH measurement, enzyme inhibition assays, hybridization reactions, and dissolution studies. Multi-position magnetic stirrers drive multiple stir bars simultaneously on a single unit, enabling parallel sample processing in analytical laboratories, pharmaceutical quality control, and environmental testing workflows. Use a standalone magnetic stirrer (no heat) when you need uniform mixing without thermal input: titrations, pH measurement, cold-room work, and mixing heat-labile reagents.
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<h2 dir="ltr">What You Will Find:&nbsp;</h2>
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Digital hotplate magnetic stirrers offer precise temperature control up to 550&deg;C and dual LED displays, making it easy to monitor both heat and speed at a glance.
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High-capacity magnetic stirrers are designed to handle larger volumes with ease, providing the powerful torque needed for consistent mixing in bigger batches.
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Compact and ultra-flat stirrers provide a space-saving solution for crowded benchtops, featuring low-profile designs and PET surfaces that are tough and easy to clean.
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Multi-channel magnetic stirrers allow you to stir up to 10 samples simultaneously with uniform speed, perfect for boosting your lab&rsquo;s productivity.
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Analog and classic stirrers bring reliable, straightforward performance to your workstation with durable stainless steel or ceramic-coated plates that resist wear and tear.
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Auto-reverse and timer functions give you professional-level control over your mixing cycles, ensuring your samples get exactly the treatment they need.
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<h2>How to Choose a Magnetic Stirrer</h2>
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Single-position vs. multi-position
Single-position stirrers are the most common format for benchtop chemistry and biology work, accommodating one vessel at a time. Multi-position magnetic stirrers (2, 6, 10, or 15 positions on a single plate) are used for high-throughput applications such as dissolution testing, parallel reaction screening, and environmental sample preparation, where identical mixing conditions across multiple vessels are required simultaneously.
Digital vs. analog control
Analog (dial-control) magnetic stirrers are reliable, low-maintenance, and appropriate when mixing speed precision is not critical. Digital stirrers display speed in rpm, maintain the setpoint with a feedback motor controller, and provide reproducible speed settings session to session, which is important for protocols requiring a specific agitation rate (e.g., OD600 turbidity assays, viscosity studies). Some digital models log rpm and run-time data via USB.
Speed range and stir bar compatibility
Most magnetic stirrers cover 100 to 1500 rpm. Microplate and high-throughput models reach up to 1500 rpm with small stir bars. For large-volume vessels (3 L and above), a lower maximum speed (300 to 500 rpm) with a large stir bar (60 mm to 80 mm) is more appropriate than attempting high speed with an undersized bar. PTFE stir bars are available in lengths from 3 mm (for microcentrifuge tubes) to 80 mm (for large vessels); octagonal, cross-shaped, and egg-shaped bars improve mixing in round-bottom flasks compared to standard cylindrical bars.
Plate size and chemical resistance
Plate dimensions determine the largest vessel the stirrer can stably support. A 135 mm x 135 mm plate accommodates a 1 L beaker; larger plates (200 mm x 200 mm and above) are needed for 3 L to 5 L vessels. PTFE-coated plates or ceramic tops offer the highest chemical resistance for work with acids, bases, and organic solvents. Stainless steel tops provide stronger magnetic coupling for viscous materials.
Cold-room and CO2 incubator use
Magnetic stirrers designed for cold-room use (2 degrees C to 8 degrees C) or for operation inside a CO2 incubator use sealed, humidity-resistant motor housings and are rated for continuous operation under those environmental conditions. Standard benchtop stirrers are not rated for cold-room or high-humidity incubator use; using them in these environments shortens motor life.
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<h2>Specifications Context</h2>
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Motor type affects long-term reliability: brushless DC motors require no maintenance and last longer than brushed motors, which need periodic brush replacement in continuous-use settings. PTFE stir bars should be replaced when the PTFE coating chips or shows wear; bare metal exposure contaminates the solution and interferes with magnetic coupling. For regulated applications (pharmaceutical QC, ISO 17025 labs), specify a stirrer with a digital speed display and speed accuracy of plus or minus 1 rpm to support protocol documentation requirements. Related equipment:&nbsp;<a href="https://mbpinc.net/equipments/temperature-control-equipment/hotplate-and-stirrers"></a>
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Ready to find the perfect spin for your lab? Browse our magnetic stirrer collection and <a href="https://mbpinc.net/contact-us">reach out to the MBP team</a> for a quote today.

Magnetic Stirrer, Low Profile, 100-240V, 50/60Hz, with US, UK, EU Plugs, 25 to 1500rpm, Auto-Reverse Function, IP65 rating, PET surface

GSF by Globe Scientific is a 15 mm (0.6 in) low-profile magnetic stirrer with universal voltage (100–240 V), included US/UK/EU plug adapters, IP65 ingress protection, chemical-resistant PET surface, and auto-reverse mix mode. cTUVus certified. ISO 9001:2015 manufacturer.

Manufacture

Rollers & Rotators

<h2>What are tube rollers and rotators?</h2>
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Tube rollers and rotators are low-speed mixing instruments that provide gentle, continuous agitation of tubes and bottles through rolling or inversion motion rather than high-speed shaking. A tube roller operates by rotating horizontal rollers that the tubes or bottles rest on, causing them to roll along their long axis in place, creating slow, even mixing of the tube contents without introducing air bubbles. A rotator (end-over-end mixer) clamps tubes in a wheel or drum that rotates at 5&ndash;30 rpm, inverting the tubes repeatedly through a full circle for thorough but gentle mixing.
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<h2 dir="ltr">What you will find:</h2>
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<a href="https://mbpinc.net/equipments/agitation-equipment/rollers-and-rotators">Rollers &amp; Rotators</a>:
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Mini &amp; Digital Rotators: Compact benchtop rotating mixers and programmable units designed for smooth, continuous sample inversion.
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Multi-Roller Tube Rollers: High-capacity 5-roller, 6-roller, and 10-roller systems engineered for uniform rolling of culture bottles and blood tubes.
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Temperature-Controlled Rotators: Special incubated models that combine steady sample rotation with precise temperature management.
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Platform Rockers: Basic single-platform shaking and rocking systems optimized for blot washes and gel staining procedures.
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<a href="https://mbpinc.net/equipments/agitation-equipment/rollers-and-rotators/roller-and-rotator-accessories">Roller &amp; Rotator Accessories:</a>
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<li data-path-to-node="4,0,0">Interchangeable Tube Holders: Snap-on racks and clips designed specifically to accommodate 1.5ml, 2.0ml, 15ml, and 50ml laboratory tubes.</li>
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<h2>How to choose rollers and rotators</h2>
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Choose a tube roller for blood collection and clinical tube mixing
Tube rollers are the standard instrument for homogenizing anticoagulated blood collection tubes before clinical testing, operating at 5&ndash;20 rpm to ensure even mixing of blood and anticoagulant without hemolysis from excessive speed. The roller format also suits other tubes and bottles that are too long for end-over-end rotation to work effectively in the space available.
Choose a rotator for antibody-bead incubations and immunoprecipitation
End-over-end rotators invert tubes through a full 360&deg; cycle, ensuring that beads settled at the tube bottom are continuously resuspended and that the bead surface is uniformly exposed to the solution throughout the incubation. This complete inversion is essential for immunoprecipitation, pull-down assays, and antibody-coupling incubations where beads must stay in suspension for efficient binding.
Consider the tube capacity and format each instrument accommodates
Tube rollers hold a fixed number of tubes of defined diameter on the roller surface; rotator wheels typically accommodate a defined set of tube positions for specific tube formats. Confirm that the instrument handles the tube diameter, length, and quantity you work with most commonly, and that accessories are available to accommodate additional formats.
Evaluate speed range against your mixing requirement
Blood sample homogenization requires gentle speed of 5&ndash;12 rpm to avoid hemolysis, while antibody-bead incubations can use faster rotation of 10&ndash;30 rpm for more active suspension maintenance. A variable-speed rotator provides flexibility across applications; a fixed-speed roller set at the correct blood mixing speed is adequate for dedicated blood handling.
Confirm whether incubator-compatible models are needed for your workflow
Rotator and roller incubations often require 37&deg;C for antibody binding or hybridization reactions. Models designed for incubator interior use have compact profiles and materials that tolerate incubator humidity and temperature, while standard bench models are not always rated for this environment.
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<h2>Specifications context</h2>
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Tube rollers used for blood sample mixing are typically operated at a fixed or low-speed range of 5&ndash;12 rpm, a range established from clinical literature showing that this rotation speed adequately homogenizes anticoagulated blood without inducing hemolysis from mechanical stress. As of 2026, compact benchtop tube rollers that fit inside standard incubators and cold rooms without taking up significant shelf space remain popular in clinical and research labs for routine sample preparation.
If you&rsquo;re unsure which rotation style or capacity fits your current workflow, the MBP team is here to help&mdash;<a href="https://mbpinc.net/equipments/rollers-and-rotators">contact us today for a custom quote.</a>

User Manual

Product Literature

Industrial Analog Tube Rotator

The Globe Scientific™ Industrial Analog Tube Rotator (GTR-IA) is an all-metal industrial analog tube rotator with a fixed-angle Ferris Wheel disk for true end-over-end rotation. Analog speed control covers 0 to 80 rpm; no programming required. Includes 12 tube clips each for 1.5/2.0 mL, 15 mL, and 50 mL tubes (36 total), configurable in any combination on the same disk. DC motor, 100-240V 50/60 Hz (US/UK/EU plugs included), cold room compatible. 2-year warranty. Replacement clip accessories available separately: GTR-IA-1.5 (1.5 mL clips), GTR-IA-15 (15 mL clips), GTR-IA-50 (50 mL clips).

Motor Type

Speed Range

Tube Capacity

Operation Mode

Voltage

Power

Dimensions (WxDxH)

Operating Temperature

Permissible Relative Humidity

Protection Class

Warranty

Tube Rotator, Industrial, Analog, Variable Speed and Fixed Angle, 120-240v, 50/60Hz, US, UK, EU Plugs (Includes: Configurable Disk with Tube Holder Clips, 12 each 1.5/2.0mL, 12 each 15mL and 12 each 50mL)

Tube Holder Clips for use with GTR-IA Tube Rotator, 12 each for 1.5mL Microcentrifuge Tubes

Tube Holder Clips for use with GTR-IA Series Tube Rotators, 12 each for 15mL Centrifuge Tubes

Tube Holder Clips for use with GTR-IA Series Tube Rotators, 12 each for 50mL Centrifuge Tubes

Instruction Manual

Horizontal Analog Tube Rotator with Adjustable Speed

The Globe Scientific™ Horizontal Analog Tube Rotator (GTR-HA) is a horizontal end-over-end analog tube rotator with 0-80 rpm variable speed, universal 120-240V power, and included clips for 1.5/2.0 mL, 15 mL, and 50 mL tubes (36 + 12 + 12 clips). US, UK, and EU plugs included. Stainless steel rotisserie platen with interchangeable clip-on tube holders. Base unit (GTR-HA) includes US/UK/EU plugs. Replacement clip accessories available: GTR-HA-1.5 (1.5 mL), GTR-HA-15 (15 mL), GTR-HA-50 (50 mL).

Tube Cpacity

Sixteen (16)

Eight (8)

Dimensions (W x D x H)

Weight

Tube Rotator, Horizontal, Analog, Adjustable Speed, 120-240v, 50/60Hz, US, UK, EU Plugs (Includes Tube Holder Clips: 36 each 1.5/2.0mL, 12 each 15mL and 12 each 50mL Tubes)

Tube Holder for use with GTR-HA Series Tube Rotators, 12 each for 1.5mL Microcentrifuge Tubes

Tube Holder for use with GTR-HA Series Tube Rotators, 12 each for 15mL Microcentrifuge Tubes

Tube Holder for use with GTR-HA Series Tube Rotators, 12 each for 50mL Microcentrifuge Tubes

United States

Texas

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