Jihepu AM110W-O Laboratory Stirrer

Overview

The Jihepu AM110W-O Laboratory Stirrer is an engineered solution for precise, reproducible mixing of low- to high-viscosity liquids in research, quality control, and pilot-scale development environments. It operates on the principle of mechanical rotational agitation—applying controlled torque via a brushless DC motor to drive impellers through viscous or heterogeneous media. Unlike brushed motors, the brushless architecture ensures consistent speed delivery across variable loads, minimal electromagnetic interference, and extended service life without carbon brush replacement. The unit employs closed-loop speed regulation: an integrated microprocessor continuously monitors shaft rotation via optical or Hall-effect sensing and dynamically adjusts power output to maintain setpoint accuracy within ±1% under fluctuating load or line voltage conditions (AC 110–240 V, 50/60 Hz). Designed for S1 continuous-duty operation, it supports unattended, long-duration protocols—critical for dissolution testing, suspension homogenization, or reaction kinetics studies where thermal or rheological stability must be preserved over hours.

Key Features

• Brushless DC motor with real-time dynamic speed feedback and automatic load compensation
• OLED display showing actual speed, timer countdown, and operational status
• Stepless (infinite) speed adjustment from 30 to 2000 rpm, enabling fine-tuned shear control
• Integrated electronic overload protection with automatic shutdown and audible alert
• Quick-release chuck system accommodating stirring rods from Φ2 mm to Φ10 mm diameter
• Pre-installed three-blade helical impeller optimized for axial flow and efficient bulk mixing
• IP40-rated enclosure suitable for standard laboratory ambient conditions (≤40 °C, ≤80% RH)
• Compact footprint (215 × 310 × 600 mm) with stable base design minimizing vibration transmission

Sample Compatibility & Compliance

The AM110W-O is validated for use with aqueous, organic, and semi-viscous systems up to 100,000 mPa·s—covering applications ranging from buffer preparation and cell culture media conditioning to polymer dispersion and pharmaceutical suspension formulation. Its torque profile supports both low-shear blending (e.g., protein solutions) and moderate-shear dispersion (e.g., pigment suspensions). While not certified to IEC 61000-6-3 or UL 61010-1 out-of-box, the device meets fundamental safety requirements for laboratory electrical equipment per GB 4793.1 (China’s equivalent to IEC 61010-1). When operated within specified environmental limits and used with GLP-compliant documentation practices—including operator ID logging, parameter verification, and timestamped run records—it supports audit-ready workflows aligned with ISO/IEC 17025 and FDA 21 CFR Part 11 data integrity expectations.

Software & Data Management

The AM110W-O operates as a standalone instrument with no proprietary software dependency. All operational parameters—including speed setpoint, timer duration, and real-time RPM—are locally stored in non-volatile memory and retained after power cycling (speed memory function). The OLED interface provides immediate visual confirmation of active settings, eliminating ambiguity during protocol execution. For laboratories requiring electronic record capture, the unit’s analog-compatible output signal (0–5 V or 4–20 mA optional via external adapter) enables integration with SCADA systems, LIMS, or custom LabVIEW-based acquisition platforms. Timestamped manual logs—recording batch number, operator initials, start/stop times, and observed viscosity trends—constitute the minimum traceable data set compliant with GMP Annex 11 and USP analytical instrument qualification guidelines.

Applications

• Dissolution testing of solid dosage forms in pharmacopeial vessels (USP Apparatus II)
• Homogenization of microbial growth media prior to sterilization and inoculation
• Preparation of calibration standards for turbidity, particle size, or conductivity assays
• Mixing of catalyst slurries in fine chemical synthesis development
• Stabilization of emulsions and colloidal dispersions in food science R&D
• Blending of conductive pastes and battery electrode slurries in materials labs

FAQ

Is the AM110W-O compatible with corrosion-resistant or PTFE-coated stirring rods?

Yes—the quick-release chuck accepts rods with outer diameters between 2 mm and 10 mm, including those with PTFE, glass, or stainless-steel shafts. Ensure rod length and weight remain within moment-of-inertia limits specified in the user manual to preserve speed stability.

Can the timer be disabled for continuous operation?

Yes—setting the timer to “0” or “∞” (depending on firmware version) disables automatic shut-off, allowing uninterrupted S1-rated duty cycles.

Does the unit support external analog speed control inputs?

Not natively; however, optional analog interface modules (sold separately) provide 0–5 V or 4–20 mA input compatibility for centralized process control integration.

What maintenance is required for long-term reliability?

None beyond periodic cleaning of the chuck mechanism and inspection of the impeller mounting thread. The brushless motor requires no scheduled lubrication or brush replacement over its rated service life.

Is calibration traceable to national standards available?

Factory calibration certificates (traceable to CNAS-accredited reference standards) are provided upon request at time of order. Field recalibration is performed using a handheld tachometer and certified torque tester per ISO 17025 procedures.