The American Scientific Products S8223-1 is a heavy-duty, high-performance vortex mixer designed for the rapid and thorough mixing of samples in various laboratory containers. Featuring a robust motor and a weighted base, this mixer provides exceptional stability even at its highest speeds. With its versatile variable speed control and dual-mode operation, the S8223-1 is an essential tool for life science, clinical, and analytical laboratories requiring precise control over vortexing intensity. Technical Performance and Design Variable Speed Control: Equipped with a precision adjustment dial that allows for a smooth transition from gentle agitation to vigorous, high-speed vortexing, accommodating a wide range of sample viscosities. Dual-Mode Operation: Features a three-position power switch allowing for Touch mode (activation upon downward pressure) or Continuous mode (constant operation for use with optional attachments). Heavy-Duty Weighted Base: Constructed with a high-mass metal housing and vibration-dampening rubber feet to prevent walking or creeping across the benchtop during high-speed use. Eccentric Drive System: Utilizes a counterbalance drive mechanism that delivers a consistent circular motion while minimizing mechanical noise and vibration transfer to the user's hand. Product Specifications Model: S8223-1 Speed Range: Variable up to 3000 RPM Operating Modes: Touch (Auto) / Off / Continuous (On) Attachment Type: Standard Rubber Cup Head Electrical Requirements: 120V, 50/60 Hz Housing Material: Die-cast metal with chemical-resistant coating Footprint: Approximately 5 x 6 inches Operational Advantages Optimized Sample Integrity: The ability to fine-tune the speed ensures that delicate samples can be mixed gently without shearing, while stubborn pellets can be resuspended at maximum power. Reduced Operator Fatigue: The ergonomic height and sensitive Touch activation require minimal force, making it comfortable for repetitive tasks and high-throughput sample preparation. Versatile Vessel Compatibility: The standard cup head is designed to hold everything from small microtubes to large 50 ml centrifuge tubes and culture flasks. Durable Laboratory Workhorse: Built to withstand the rigors of daily lab use, the S8223-1 is known for its long-term reliability and low-maintenance brushless motor design. Used; great condition.