What is an Overhead Stirrer?
An overhead stirrer is a high-precision tool that labs use to mix, homogenize, suspend, and recirculate thick materials or large amounts of liquid. While magnetic stirrers work well for thin liquids and small-scale jobs overhead stirrers are more effective for thicker samples or when magnetic stirring doesn’t do the trick.
These devices offer steady powerful stirring and let scientists observe and adjust reactions even as the viscosity changes during the process. This makes them essential for advanced research and industrial applications.
Neuation Overhead stirrer by Accumax deliver consistent, high-torque performance, making them a reliable choice for demanding lab tasks. These tools enable researchers to observe and manage reactions well—even when viscosity shifts during the process—making them essential for advanced research and industrial applications.
Key factors to consider before choosing an Overhead Stirrer
While choosing a suitable overhead stirrer make sure your lab mixing is efficient, steady, and doesn’t cause any accidents. This is important when you’re dealing with complex or high-viscosity samples. To make well-informed decision, remember these couple of crucial factors
1. Viscosity Handling
The viscosity of a liquid refers to its thickness, or the resistance it faces when flowing. You require greater power from your overhead stirrer to blend a denser substance. It’s essential to choose a stirrer that maintains the same speed, regardless of whether the mixture becomes thicker or thinner during the process. You need to determine whether the substances you combine resemble water and are somewhat viscous or truly thick. To achieve optimal results, you should choose a stirrer capable of mixing the thickest substances you may encounter. Stirrers made to handle approximately 10,000 mPas, 30,000 mPas, and 50,000 mPas are excellent for various laboratory activities.
2. Stirring Speed
Overhead stirrers are available with various speed options—some feature fixed speeds, while others allow for a variable adjustment range. Depending on your use case, you might require rapid mixing or gentle, measured stirring.
Seek out stirrers featuring digital speed indicators for enhanced precision and consistent outcomes.
3. Volume Capacity
Your stirrer ought to manage the largest batch volume you usually operate with. Whether you’re preparing 2 liters or increasing to 75 liters, choosing an overhead stirrer with the appropriate volume capacity is crucial for both efficiency and durability.
Accumax Overhead Stirrers are crafted to fulfill diverse laboratory requirements, providing optimal volume capacities of 25L, 40L, and 75L. Featuring strong performance and dependable mixing for various viscosities, Accumax guarantees uniform results, batch after batch.
4. Torque Power
Torque is the force that keeps the stirrer rotating, even when the mixture becomes thick or resistant. Higher torque ensures reliable mixing, especially for dense or high-viscosity samples.
For efficient and stable operation across various lab applications, the ideal torque capacities for overhead stirrers are 20 Ncm, 40 Ncm, and 75 Ncm.
5. Interface and Control Options
Designed for precision and safety, some overhead stirrers offer reversible mixing (CW/CCW), smart control for uninterrupted operation, and automatic shut-offs for overload, current, and temperature. A large digital display ensures real-time monitoring, while the push-through shaft makes working with viscous samples effortless—perfect for advanced lab workflows.
6. Accessories and Additional Features
Modern overhead stirrers offer a variety of features and optional accessories to enhance functionality:
- Reversible rotation
- Automatic shutdown
- Programmable mixing cycles
- LED lighting or integrated timers
- Digital torque/speed displays
Top Picks for Reliable Overhead Mixing Solutions
With 20+ years of experience in delivering precision-engineered benchtop equipment, Accumax brings you a stirring solution you can trust. Designed for labs that demand both performance and reliability, the iSTIR OH PRIME and iSTIR OH 75 ELITE are more than just overhead stirrers—they’re your dependable lab partners.
iSTIR OH PRIME
Engineered for day-to-day excellence, this compact powerhouse features a brushless DC motor for quiet, maintenance-free operation and a microprocessor-controlled system that ensures consistent performance across a wide range of viscosities and volumes—up to 30,000 mPas and 40L.
Key Features:
- Speed range: 50–2000 RPM
- Timer: 1 min to 999 hrs 59 min + continuous mode
- Reversible mixing motion (CW/CCW)
- Smart control for uninterrupted mixing
- Safety shut-offs for overload, current, and temperature
- Large digital display for real-time monitoring
- Push-through shaft for ease with viscous liquids
- CE certified
iSTIR OH 75 ELITE
Built for high-demand applications, the ELITE model offers enhanced performance with the capacity to stir up to 100L and handle viscosities of up to 70,000 mPas. It carries forward all the advanced features of the PRIME, plus added strength and durability for intensive tasks.
Key Features:
- Speed range: 60–2000 RPM
- Timer: 1 min to 999 hrs 59 min + continuous mode
- Reversible mixing motion (CW/CCW)
- Smart control for uninterrupted mixing
- Safety shut-offs for overload, current, and temperature
- Large digital display for real-time monitoring
- Push-through shaft for ease with viscous liquids
- CE certified
Also Read: Ways to solve Magnetic stirrer issues
