Jihepu AM300S-H Series Laboratory Stirrer

Overview

The Jihepu AM300S-H Series Laboratory Stirrer is a precision-engineered electric stirrer designed for reliable, continuous-duty mixing of low- to high-viscosity liquids in academic, pharmaceutical, chemical, and food science laboratories. Built upon a compact series-wound micro-motor architecture, the unit delivers consistent rotational torque across its full speed range (100–1800 rpm), enabling effective homogenization, dissolution, suspension, and reaction acceleration in volumes up to 40 L (water-equivalent). Its core operational principle relies on controlled mechanical agitation—transferring kinetic energy from a regulated motor through a gear-reduction torque amplifier to the stirring shaft—thereby ensuring stable shear input even under variable load conditions. Unlike basic rheostat-controlled stirrers, the AM300S-H employs a microprocessor-based closed-loop speed regulation system that dynamically compensates for voltage fluctuations and viscosity-induced drag, maintaining setpoint accuracy within ±1 rpm. This engineering approach supports reproducible experimental protocols essential for method validation, QC testing, and GLP-compliant research.

Key Features

• Microprocessor-controlled speed regulation with real-time load compensation for high-speed stability and repeatability
• Integrated torque-amplification gearbox delivering 159.2 N·cm output torque—optimized for viscous media and heavy-duty batch mixing
• Digital LED speed display with ±1 rpm resolution, supporting traceable data recording and protocol documentation
• Programmable timer (1–1000 min) with auto-shutdown, enabling unattended operation and time-critical reaction control
• Soft-start circuitry and electronic overload protection to prevent motor stall and thermal degradation during extended runs
• Quick-release chuck (Φ2–13 mm) with 159.0 N·cm clamping torque, compatible with standard laboratory impellers including paddle, propeller, and anchor types
• Robust housing constructed from die-cast aluminum and high-strength engineering plastics for vibration damping and long-term dimensional stability

Sample Compatibility & Compliance

The AM300S-H accommodates aqueous, organic, and semi-paste formulations with viscosities up to 100,000 mPa·s—suitable for polymer solutions, colloidal suspensions, emulsions, and cell culture media. Its ambient-temperature operation (≤40 °C ambient, ≤80% RH) meets standard laboratory environmental specifications per IEC 61010-1 for electrical safety in measurement and laboratory equipment. While not intrinsically rated for hazardous locations, the unit complies with CE marking requirements for EMC (EN 61326-1) and low-voltage directive (2014/35/EU). For regulated environments, its digital speed logging, timer traceability, and consistent torque delivery support alignment with ASTM D1824 (viscosity measurement), USP (dissolution apparatus qualification), and internal SOPs requiring documented mixing parameters.

Software & Data Management

The AM300S-H operates as a standalone instrument without proprietary software dependency. All operational parameters—including set speed, elapsed time, and real-time RPM—are displayed locally via integrated LED indicators. The device stores last-used speed and timer settings in non-volatile memory, facilitating rapid reconfiguration between experiments. While no USB or RS-232 interface is provided, the ±1 rpm digital readout enables manual entry into LIMS or ELN systems. For audit readiness, users may document speed/time logs alongside batch records; the unit’s S1 continuous duty rating and thermal protection ensure compliance with GLP/GMP expectations for equipment reliability during multi-hour process validation runs.

Applications

• Homogenization of reagent solutions and buffer preparations in analytical and clinical labs
• Dissolution testing of solid dosage forms (tablets, capsules) per USP apparatus II protocols
• Preparation of polymer blends, nanoparticle dispersions, and ceramic slurries in materials R&D
• Cell suspension maintenance in bioreactor seed train operations and microbial fermentation studies
• Emulsion stabilization trials in food science and cosmetic formulation development
• Accelerated chemical synthesis where controlled agitation enhances mass transfer and heat distribution

FAQ

What is the maximum viscosity the AM300S-H can handle reliably?

The unit is rated for continuous operation with Newtonian fluids up to 100,000 mPa·s at 100 rpm using appropriate impeller geometry (e.g., anchor or helical). Performance beyond this threshold depends on impeller design, vessel geometry, and thermal management.

Does the stirrer support external control or data export?

No. The AM300S-H is a manually operated, self-contained unit with no analog/digital output ports. All parameter monitoring occurs via front-panel LED display.

Is the chuck compatible with ISO-standard stirring rods?

Yes—the quick-release clamp accepts round-section shafts from Φ2 mm to Φ13 mm, covering common ISO 8573-1 compliant lab-grade stirring rods and OEM impellers.

Can it be used in fume hoods or controlled-environment chambers?

Yes, provided ambient temperature remains ≤40 °C and relative humidity ≤80%. The die-cast aluminum housing provides adequate thermal dissipation for enclosed spaces with passive ventilation.

What safety certifications does the unit carry?

It conforms to IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use) and carries CE marking for EMC (EN 61326-1) and Low Voltage Directive (2014/35/EU) compliance.