Introduction
An overhead stirrer is a laboratory instrument used for stirring, mixing, and homogenizing liquids, suspensions, and viscous materials in containers, and it is designed for applications that require more power and torque than a magnetic stirrer can provide, such as large volumes, viscous liquids, and heavy mixing tasks. The instrument consists of a motor mounted above the container on a stand, a shaft that extends downward into the container, and a stirring impeller or propeller attached to the end of the shaft; the motor rotates the impeller at a controlled speed, creating a mixing action in the liquid, and the stirrer is mounted on a support stand so that the shaft can be positioned in the container, with the height and angle adjustable, and the speed is controlled with a digital or analog controller, with many models providing high torque at low speeds for viscous materials. Overhead stirrers are used in chemistry, biology, pharmacy, cosmetics, food, and materials laboratories for preparing solutions, for dissolving solids, for mixing viscous liquids, for emulsification, for suspending particles, for homogenization, for polymer solutions, for paints and coatings, for reactions in large vessels, and for other applications where effective mixing is required, and they are available in various power ratings and torque capacities, with features such as adjustable speed, overload protection, and quiet operation. With their power and versatility, overhead stirrers are essential instruments for mixing in laboratories and production.
Overhead Stirrer LOSR-T2015
Overhead Stirrer supports a maximum stirring volume of 60 L with stable output to handle large liquid batches. It features a programmable timer that lets users set specific mixing durati...
Overhead Stirrer LOSR-T2014
Overhead Stirrer supports a maximum stirring volume of 40 chuck securely holds the stirring rod and prevents loosening during operation. Our Overhead Stirrer is ideal for pharmaceutical ...
Overhead Stirrer LOSR-T2013
Overhead Stirrer supports a maximum stirring volume of 20 liquid processing. The stepless speed control provides stable adjustment across different viscosities. It features a closed hous...
Overhead Stirrer LOSR-T2012
Overhead Stirrer supports a maximum stirring volume of 60 laboratory mixing. It uses stepless speed control to adjust smoothly across varying viscosities. The stirring rod penetration ho...
Overhead Stirrer LOSR-T2011
Overhead Stirrer supports a maximum 40 chuck to prevent rod loosening during extended operation. The closed housing safeguards internal parts from corrosion for longer service life. Our ...
Overhead Stirrer LOSR-T2010
Overhead Stirrer supports a maximum stirring volume of 20 overload protection halts operation under excess load to prevent damage. Our overhead stirrer is ideal for mixing tasks in chemi...
Overhead Stirrer LOSR-T2010
Overhead stirrer can handle viscosities up to 70,000 mPas and features a maximum stirring capacity of 100 torque over five times higher than high-speed torque. The stirrer comes equipped...
LCD Overhead Stirrer LOSR-T2012
Overhead Stirrer enables a 70-liter mixing capacity ideal for large-volume laboratory processes. It operates from 50 to 1100 rpm, allowing effective control of low-speed stirring tasks....
LCD Overhead Stirrer LOSR-T2011
Overhead Stirrer handles up to 40 L of water-based mixtures for high-capacity mixing needs. It maintains a speed range of 50 to 2200 rpm for consistent control during daily operations. ...
LCD Overhead Stirrer LOSR-T2010
Overhead Stirrer supports a maximum stirring volume of 20 liters for water-based media. It features a brushless DC motor operating within a speed range of 50 to 2200 rpm. The unit deliv...
LED Overhead Stirrer LOSR-T2011
Overhead Stirrer supports a maximum stirring capacity of 40 L, making it suitable for large-volume mixing. It delivers a wide speed range from 50 to 2200 rpm, allowing for flexible cont...
LED Overhead Stirrer LOSR-T2010
Overhead Stirrer supports a maximum stirring volume of 20 laboratory mixing. It features a speed range of 50 to 2200 rpm for gentle to vigorous sample agitation. Delivers 40 N·cm torqu...
Overhead Stirrer LOSR-T2017
Overhead Stirrer is well-suited for thicker solutions with a viscosity of up to 16000 mPas. It supports a maximum mixing volume of 20 liters and features a rated torque of 30 N.cm. The s...
Overhead Stirrer LOSR-T2016
Overhead Stirrer supports viscosities up to 8000 mPas and boasts a torque of 15 N.cm. It is designed for continuous, long-term operations with zero interruptions with an extensive 24-hou...
Overhead Stirrer LOSR-T2015
Overhead Stirrer has a rated torque of 20 N.cm, which enables it to handle substances with a maximum viscosity of 10,000 mPas. It operates using a simple knob control, allowing users to ...
Overhead Stirrer LOSR-T2014
Overhead Stirrer operates at maximum speed of 2200 rpm, ensuring efficient mixing results. Equipped with powerful motor that delivers high torque for heavy-duty stirring. Its adjustable ...
Overhead Stirrer LOSR-T2013
Overhead Stirrer features a speed range from 50 to 2200 rpm, providing versatile stirring capabilities for different materials. The maintenance-free explosion-proof DC brushless motor en...
Overhead stirrer LOSR-T2010
Overhead Stirrer durable operation while reducing downtime. It features a low-noise design that ensures a quieter, more comfortable work environment. The continuous operation mode enable...
Overhead stirrer LOSR-T2012
Overhead Stirrer model, ideal for continuous, general purpose mixing. This robust and durable stirrer is driven by DC motors, perfect for smaller scale mixing. This magnetic stirrers is ...
Overhead stirrer LOSR-T2011
Overhead Stirrer model, ideal for continuous, general purpose mixing. This robust and durable stirrer is driven by DC motors, perfect for smaller scale mixing. This magnetic stirrers is ...
Standards
IEC 61010-2-051:2018-Particular requirements for laboratory equipment for mixing and stirring
Complies with the above standards, but is not limited to them.
Features
1. Overhead stirrer for high-torque mixing of viscous and large-volume samples.
2. Mounted above the vessel with stirring shaft for powerful, controlled agitation.
3. Suitable for chemical, pharmaceutical, food, cosmetic and industrial laboratories.
4. Adjustable speed with high torque for viscous solutions, suspensions and emulsions.
5. Includes stirrer motor, stand, chuck, stirring shaft and operation manual.
FAQ
Q1: What testing scenarios is this stirrer mainly applied to?
A: The overhead stirrer is used in chemical synthesis, pharmaceutical manufacturing, food processing, cosmetic formulation, paint and coating production, and industrial laboratories to mix, stir and homogenize viscous, large-volume or high-solid-content samples that cannot be effectively mixed by magnetic stirrers. It supports chemical reaction mixing for synthesis and polymerization, pharmaceutical formulation and suspension preparation, food product mixing and emulsification, cosmetic cream and lotion preparation, paint and coating formulation, and general laboratory high-torque mixing. The overhead design provides direct mechanical agitation with high torque, making it suitable for viscous materials and large volumes. It is essential for chemical, pharmaceutical, food, cosmetic and industrial laboratories requiring high-torque overhead mixing for viscous solutions, suspensions, emulsions, pastes and large-volume reactions, where magnetic stirring is insufficient due to viscosity, volume or solid content, and where powerful, controlled mechanical agitation is needed for chemical synthesis, formulation development, product preparation and process scale-up in laboratory and pilot-scale applications.
Q2: What standards does the stirrer comply with?
A: The overhead stirrer complies with relevant IEC 61010 laboratory electrical safety standards and applicable GB/T standards for laboratory mixing equipment. Specific applications follow their own test methods. Users should verify torque, speed and chemical compatibility for their specific applications. Overload protection should be verified.
Q3: What is the warranty period for the whole machine and key components?
A: The whole overhead stirrer is covered by a 12-month warranty. The motor, gearbox, controller and stand are covered, while stirring shafts, impellers, chucks and fuses are consumables or accessories. Damage from overloading, improper use or unauthorized repair is excluded. Extended service contracts are available.
Q4: Is this device difficult to operate? Is professional training required?
A: Operation requires basic training in overhead stirring, vessel setup and safety. We provide an operation manual and remote guidance. Proper shaft and impeller selection, mounting, speed setting, torque management and safety procedures are important for effective, safe mixing.
Q5: What is the typical lead-time for order delivery?
A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.
Q6: Is regular maintenance required? What is the recommended calibration cycle?
A: Motor and gearbox lubrication per manufacturer schedule. Chuck and shaft condition checked periodically. Speed can be verified with a tachometer if quantitative control is needed. Routine cleaning of shafts and impellers recommended. No formal metrological calibration is typically required for general stirring use.
Q7: Are supporting consumables universal?
A: Stirring shafts, impellers and chucks are available from multiple laboratory suppliers, though shaft diameter and chuck compatibility should be verified. Long-term consumable cost is low to moderate depending on usage and impeller type.
Q8: Can I customize parameters or supporting accessories?
A: Customization includes torque, speed range, motor type, stand configuration, chuck size and impeller type. Additional shafts, impellers and accessories can be ordered separately. Custom orders extend delivery lead-time.
Q9: Does the purchase include on-site installation and commissioning service?
A: Standard delivery includes the overhead stirrer, stand and accessories with an operation manual. On-site installation and training are not included for standard orders but can be arranged for laboratory setup. Remote guidance is provided.
Q10: What types of samples are compatible with this equipment?
A: The overhead stirrer mixes viscous solutions, suspensions, emulsions, pastes and large-volume samples within the torque, speed and volume rating. Highly viscous or solid-heavy materials may exceed the torque capacity and require larger models. Corrosive materials require compatible shaft and impeller materials (stainless steel, PTFE-coated, etc.). Users should select appropriate impeller type (propeller, paddle, anchor) for the mixing task, ensure proper mounting and shaft alignment, start at low speed and increase gradually, never exceed the torque rating, use appropriate vessel size and shape, ensure the stirrer is securely clamped, and follow proper safety procedures including eye protection and securing vessels. The overhead stirrer should not be operated without proper mounting or with excessive lateral load on the shaft.
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