Cole-Parmer offers an extensive line of overhead laboratory mixers and accessories to suit mixing requirements from lab to scale-up. Our full line of laboratory mixers includes analog, digital, and RS232 compatible lab mixers. See the table below for more detailed information on our entire line of lab mixers.

When considering your laboratory mixing needs, consideration has to be given to a wide range of factors including:

• Container capacity
• Liquid viscosity
• Torque
• Horsepower (hp)
• Rotational speed (rpm) and diameter of mixing propeller
• Duty cycle
• Power supply

For more information on these variables, check out our Laboratory Mixer Selection Guide for definitions and requirements. Our Parametric Search for Laboratory Mixers allows you to easily search our entire selection of mixers and returns those that fit your requirments. In addition to these requirements, the position of an overhead mixer in a laboratory vessel will create different mixing patterns and lead to different results. For more information on positioning a laboratory mixer in a vessel, see Positioning a Mixer in a Cylindrical Vessel.

View our online catalog to see our full selection of products or contact our Application Specialists to help you find the right product for your needs.

Laboratory Mixer Selection Table

A laboratory mixer allows for mixing of smaller quantities of material, typically up to 100 gallons (380 liters). Lab mixers are capable of handling solutions with viscosities up to 150,000 cps, which is dependent on the torque, horsepower, and speed of the mixer. Laboratory mixers are also available with the following options:

• Speeds up to 10,000 rpm
• Through-shaft design for easy shaft and propeller adjustment
• Digital display of speed, torque, and timer functions
• Sample light for easy viewing during low light conditions
• Remote controller for easy adjustment from up to six feet away
• RS232 connectivity for easy data collection

Image	Type	Applications	Features	Specifications
	Cole-Parmer® Ultra-Compact Digital Mixer	General, non-viscous mixing	Digital display Mixing speeds up to 2500rpm Complete system includes mixer, stand, shaft, and two propellers	Speed: 60 to 2500 rpm Motor: 1/100 hp Brushless DC Maximum mixing capacity: 2 liters Display: Digital
	Cole-Parmer Stir-Pak® General Purpose Mixer	Routine, light-duty mixing of water-like substances	Analog control Mixing speeds up to 10,000 rpm Compact size	Speed: 500 to 10,000 rpm Motor: 1/15 hp fuse protected Display: Analog
	NEW Cole-Parmer Stir-Pak Dual-Shaft Mixer	General mixing requiring either high-speed, low viscosity mixing or low-speed, high viscosity mixing	Two motor shafts for more versatility Solid-state controller for precise speed control Totally-enclosed, non-vented motor	Speed(direct mixing): 50 to 500 rpm Speed(gear shaft): 3 to 250 rpm Motor: 1/50 hp TENV dual-shaft Display: Analog
	NEW Cole-Parmer Heavy-Duty Stir-Pak Mixers	System flexibility for your mixing needs	Mixing heads provide speeds of 2 to 180 rpm up to 60 to 6000 rpm Separate analog controller with 6-ft cord Available in high torque, low speed or high speed, low torque versions	Speed(high-torque, low speed): 2-180 or 9-900 rpm Speed (high-speed, low torque): 23-2300 or 60-6000 rpm Motor: 1/15 to 1/10 hp TENV Display: Analog
	NEW Cole-Parmer ServodyneTM Mixers	Digital mixing with computer interface for optional data collection	Mixing heads provide speeds of 3 to 180 rpm up to 150 to 6000 rpm Separate digital controller with 6-ft cord Available in high torque, low speed or high speed, low torque versions Optional computer software allows for easy monitoring and control of your mixer	Speed(high-torque, low speed): 3-180 or 20-900 rpm Speed (high-speed, low torque): 60-2300 or 150-6000 rpm Motor: 1/15 to 1/10 hp TENV Display: Digital
	Cole-Parmer Digital Reversing Mixer	Timed and reversed mixing for samples up to 20,000 cps	Timed mixing cycles for automatic reversing or shut-off Reversing motor for better mixing Intregrated light for better sample viewing	Speed: 40 to 2010 rpm Motor: 1/10 hp Brushless DC Maximum mixing capacity: 25 liters Display: Digital
	Cole-Parmer Digital Reversing Mixer with Remote Controller	Timed and reversed mixing for samples up to 20,000 cps with removable remote controller for operation up to 6-feet away	Removable remote controller for operation up to 6-ft away Lock-out feature prevents inadvertent changes Timed mixing cycles for automatic reversing or shut-off Reversing motor for better mixing Intregrated light for better sample viewing	Speed: 40-2000 or 80-4000 rpm Motor: 1/10 hp Brushless DC Maximum mixing capacity: 25 liters Display: Digital
	Talboys Low-Cost Laboratory Mixers	Light- to heavy-duty mixing with multiple configurations	Continuous duty mixers with overload protection Varying mixer sizes provide different speeds and torque Different configurations prvide flexibility	Speed: Varying ranges from 50 to 7500 rpm Motor: 1/75 to 1/4 hp Display: Analog
	Economical Constant-Torque Mixers	Varying speed and torque ranges for mixing low- to high-viscosity solutions	Maintain constant torque throughout speed range Totally enclosed non-ventilated (TENV) motors seal out dust and fumes Integrated control box for on/off and speed control	Speed: Varying ranges from 0 to 6000 rpm Motor: 1/15 to 1/8 hp Display: Analog
	Compact Digital Lab Mixer	Accurate and repeatable mixing for viscosities up to 15,000 cps	Integrated sample light illuminates solution being mixed Mixes up to 25 liters of solution Digital control panel makes it easy to reproduce mixing parameters	Speed: 40 to 2000 rpm Motor: 1/15 hp Brushless DC Maximum mixing capacity: 25 liters Display: Digital
	Heidolph Laboratory Mixers	Varying speed and torque ranges for mixing low- to high-viscosity solutions	Stepless speed control Provides speeds up to 2700 rpm Capable of mixing low- to high-viscosity solutions	Speed: 12 to 2000 rpm Motor: 1/40 to 1/8 hp Brushless DC Display: Analog or Digital
	GK Heller® Dual-Shaft Mixer	Mixing of low- to high-viscosity solutions	Dual-shafts provide both low and high speed mixing Maintains constant speed regardless of changes in torque TENV motor provides pulse-less mixing	Speed: 0 to 4000 rpm Motor: 1/40 hp TENV Display: Analog
	GK Heller Mixers with Digital Speed & Torque Readout	Mixing of low- to high-viscosity solutions, ideal for polymer chemistry	Maintains constant speed and torque Electronically control and monitor speed and torque Easy gathering of information for viscosity profiles	Speed: 2 to 2500 rpm Motor: 1/18 to 1/4 hp TENV Display: Digital
	IKA Laboratory Mixers and Accessories	Provide mixing of solutions with viscosities up to 150,000 cps	Mixers range from general purpose to high-viscosity mixers for process scale-up Choose from a selection of analog or digital units Accessories include stands, clamps, and impellers	Speed: Varies depending on model Motor: Varies depending on model Display: Analog or Digital
	Real-Torque DigitalTM Mixers	Constant speed as viscosity of your solution changes	Constant performance under changing demands Chuck guard protects you from spinning chuck Through-shaft motor for easy depth changes of propeller	Speed: 20 to 6000 rpm Motor: TENV Display: Digital
	Lightnin® Lab MasterTM Mixers	General purpose and computer compatible models to fit a variety of needs	Ideal for pilot studies of various processes General purpose mixers offer either constant speed or remote controlled units Digital LabMaster units provide repeatable data entry and ensure accurate scale-up	Speed: Varies depending on model Motor: Varies depending on model Display: Analog or Digital
	Air Powered Laboratory Mixers	Provides mixing where electricity is unavailable or restricted	Speeds available up to 10,000 rpm Direct and gear drive mixers available Low and high torque models available for varying viscosities	Speed: Varies depending on model and air pressure Motor: Air drive Display: None