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Pro Overhead stirrer (OS40)

The Pro Overhead Stirrer is a high-performance digital overhead mechanical stirrer featuring a brushless DC motor (120W input / 100W output), microprocessor-controlled speed regulation (50-2200 rpm, accuracy ±3 rpm), LCD display for real-time monitoring of set speed, actual speed, and torque trend, RS232 interface for PC control and data logging, enhanced torque (60 N·cm), and increased viscosity handling (up to 50,000 mPa·s), designed for demanding high-viscosity and large-volume (up to 40 liters) mixing, homogenizing, and suspending applications in clinical diagnostic, pharmaceutical, and research laboratories .
Key features include a maintenance-free, explosion-proof brushless DC motor for quiet, long-lasting operation and safe use in volatile environments; through-shaft design for easy impeller height adjustment; anti-spill slow-start mechanism to prevent sample splashing; overload protection (LCD visual alarm, automatic motor stop) for equipment and sample safety; torque display for real-time viscosity monitoring; and compatibility with a wide range of stirrer shafts (0.5-10 mm chuck diameter) .
The Pro Overhead stirrer represents a significant upgrade from the Pro Overhead stirrer, with double the stirring capacity (40L vs 20L), double the output power (100W vs 50W), 50% higher torque (60 N·cm vs 40 N·cm), and five times higher viscosity handling (50,000 mPa·s vs 10,000 mPa·s), making it suitable for the most demanding high-viscosity applications .
For the pharmaceutical formulation scientist and quality control chemist, the Pro Overhead stirrer supports mixing of high-viscosity creams, ointments, gels, and suspensions at batch sizes up to 40L, API dissolution testing, and large-volume buffer and media preparation . For the biopharmaceutical manufacturing scientist, it enables processing of cell pastes, protein solutions, and fermentation broths with viscosity up to 50,000 mPa·s . For the clinical laboratory scientist, it facilitates bulk reagent preparation for high-volume immunoassays and clinical chemistry analyzers .
Universal voltage (100-240V, 50/60Hz) enables use in laboratories worldwide without voltage conversion, while the compact (83 × 220 × 186 mm) and lightweight (2.8 kg) design allows easy benchtop placement . The IP21-rated splash-resistant housing ensures safe operation in biosafety cabinets and fume hoods, including handling of biohazardous materials . RS232 connectivity allows integration into automated workflows and LIMS for GLP/GMP documentation .
For the patient undergoing pharmaceutical therapy, the Pro Overhead stirrer enhanced torque and viscosity handling ensure consistent formulation quality, batch-to-batch uniformity, and accurate API release testing—supporting the manufacturing of safe, effective high-viscosity medications such as topical creams, ointments, and biopharmaceuticals . For patients requiring diagnostic testing, consistent large-volume reagent preparation reduces inter-run variability and improves the reliability of diagnostic test results across high-volume clinical chemistry, pharmaceutical QC, and analytical testing applications .

Pro Overhead stirrer (OS70)

The Pro Overhead Stirrer is an industrial-grade high-torque digital overhead mechanical stirrer featuring a brushless DC motor (180W input / 160W output), microprocessor-controlled speed regulation (50-1100 rpm, accuracy ±10 rpm), LCD display for real-time monitoring of set speed, actual speed, torque trend, and timer, RS232 interface for PC control and data logging, exceptional torque (300 N·cm), and ultra-high viscosity handling (up to 100,000 mPa·s), designed for the most demanding high-viscosity and large-volume (up to 70 liters) mixing, homogenizing, and suspending applications in clinical diagnostic, pharmaceutical, industrial, and research laboratories .
Key features include a maintenance-free, explosion-proof brushless DC motor for quiet, long-lasting operation and safe use in volatile environments; through-shaft "top-cross" stirring paddle design for easy impeller height adjustment and easy container replacement; anti-spill smooth start mechanism to prevent sample splashing; overload protection (LCD visual alarm, automatic motor stop, safety cut-off circuit) for equipment and sample safety; torque display for real-time viscosity monitoring; programmable timer (0-99h59min) for unattended overnight operation; silicone protective sleeve protecting drill chuck from erosive vapor and corrosion; and compatibility with a wide range of stirrer shafts (0.5-10 mm chuck diameter) with self-locking hand-tightening tool-free chuck .
The Pro Overhead stirrer represents the highest capacity model in the Pro Overhead stirrer series, with 70L stirring capacity (3.5x OS20-Pro), 300 N·cm torque (7.5x OS20-Pro, 5x OS40-Pro), 100,000 mPa·s viscosity handling (10x OS20-Pro, 2x OS40-Pro), 160W output power (3.2x OS20-Pro, 1.6x OS40-Pro), and timer function (0-99h59min) for overnight operations, making it suitable for the most demanding industrial-scale high-viscosity applications .
For the pharmaceutical formulation scientist and quality control chemist, the Pro Overhead stirrer supports mixing of ultra-high-viscosity creams, ointments, gels, suspensions, and pastes at batch sizes up to 70L, API dissolution testing, and large-volume buffer and media preparation . For the biopharmaceutical manufacturing scientist, it enables processing of cell pastes, protein solutions, fermentation broths, and monoclonal antibody formulations with viscosity up to 100,000 mPa·s . For the clinical laboratory scientist and diagnostic manufacturing manager, it facilitates industrial-scale bulk reagent preparation for high-volume immunoassays, clinical chemistry analyzers, and diagnostic kit manufacturing .
Universal voltage (100-240V, 50/60Hz) enables use in laboratories worldwide without voltage conversion, while the compact (83 × 220 × 186 mm) and lightweight (3.2 kg) design allows easy benchtop placement . The IP21-rated splash-resistant housing ensures safe operation in biosafety cabinets and fume hoods, including handling of biohazardous materials . RS232 connectivity allows integration into automated workflows and LIMS for GMP documentation .
For the patient undergoing pharmaceutical therapy, the Pro Overhead stirrer exceptional torque and viscosity handling ensure consistent formulation quality, batch-to-batch uniformity, and accurate API release testing—supporting the manufacturing of safe, effective ultra-high-viscosity medications such as topical creams, ointments, transdermal patches, and biopharmaceuticals . For patients requiring diagnostic testing, consistent industrial-scale reagent preparation reduces inter-run variability and improves the reliability of diagnostic test results across high-volume clinical chemistry, pharmaceutical QC, and analytical testing applications .