HsiangTai BL-300HD High-Torque Digital Laboratory Stirrer

Overview

The HsiangTai BL-300HD is a high-torque, digitally controlled laboratory stirrer engineered for demanding mixing and dispersion tasks in chemical synthesis, polymer processing, pharmaceutical formulation, and materials science laboratories. Unlike conventional AC-motor-driven stirrers, the BL-300HD employs a brushless DC motor architecture—delivering consistent torque output across its full 0–3000 rpm speed range while minimizing electromagnetic interference, heat generation, and mechanical wear. Its core operational principle relies on closed-loop rotational control: real-time torque feedback enables automatic speed compensation when viscosity changes occur during stirring (e.g., during polymerization or thickening reactions), ensuring stable rotational velocity without manual intervention. The unit is designed for benchtop use with no built-in temperature regulation; it is intended for integration with external heating mantles, water baths, or jacketed reactors where precise thermal management is required separately.

Key Features

• High-torque brushless DC motor: Rated at 0.98 N·m (10 kgf·cm), enabling reliable agitation of high-viscosity media up to 20 L volume—ideal for suspensions, pastes, and non-Newtonian fluids.
• Dual-mode torque monitoring: Simultaneous visual indication via five-segment LED bar (20–100% increments) and high-resolution digital numeric display—supporting both rapid operational assessment and quantitative process documentation.
• Intelligent speed stabilization: Automatic torque compensation maintains set rpm despite dynamic load variations, critical for reproducible reaction kinetics and scalable batch consistency.
• Extended digital timer: Programmable timing from 1 minute to 99 hours 59 minutes with auto-shutdown—suitable for unattended overnight or multi-day experiments under GLP-compliant workflows.
• Robust mechanical design: Stainless steel chuck with hollow shaft allows vertical adjustment and secure clamping of rods ≤ Ø10 mm; precision-machined housing ensures vibration damping and long-term alignment stability.
• Comprehensive safety architecture: Integrated thermal cutoff, electronic overload detection, and replaceable fuse provide redundant protection against motor stall, ambient overheating, or power surge events.

Sample Compatibility & Compliance

The BL-300HD accommodates standard laboratory glassware (e.g., beakers, flasks, jacketed reactors) up to 20 L capacity when used with appropriate support stands and clamps. It supports common stirring elements—including propeller, paddle, anchor, and dissolver blades—via its universal Ø10 mm chuck interface. While the device itself carries no intrinsic regulatory certification, its electrical design complies with IEC 61010-1 (Safety Requirements for Electrical Equipment for Measurement, Control, and Laboratory Use). When deployed in regulated environments (e.g., pharmaceutical QC labs), the unit may be included in equipment qualification protocols (IQ/OQ/PQ) and referenced in SOPs supporting ASTM D2196 (viscosity of paints), ISO 3219 (rheology of polymer solutions), or USP (uniformity of dosage units). No inherent data integrity features are embedded; however, its digital timer and torque readouts generate traceable operational records compatible with manual logbook entry or external data acquisition systems.

Software & Data Management

The BL-300HD operates as a standalone instrument with no onboard software, cloud connectivity, or USB/RS-232 interfaces. All operational parameters—including set speed, elapsed time, and real-time torque percentage—are displayed locally via LED and digital LCD panels. For laboratories requiring electronic recordkeeping, users may manually transcribe values into validated LIMS or ELN platforms. Though not compliant with FDA 21 CFR Part 11 out-of-the-box, the device supports audit-trail-ready documentation when paired with procedural controls (e.g., defined calibration intervals, operator sign-offs, and version-controlled SOPs). Optional accessories—including spring-loaded lift assemblies and stainless steel impellers—are documented in accessory catalogs with part numbers for procurement traceability.

Applications

• Homogenization of ceramic slurries and battery electrode pastes in R&D and pilot-scale manufacturing.
• Controlled agitation during emulsion polymerization and solvent-based resin synthesis.
• Dispersion of nanomaterials (e.g., graphene oxide, metal oxides) in aqueous or organic media.
• Preparation of viscous pharmaceutical suspensions and ointment bases under cGMP-aligned development protocols.
• Long-duration dissolution testing where stable rotational velocity over extended periods is essential.

FAQ

Does the BL-300HD include temperature control?
No. This model provides only mechanical stirring functionality. External heating or cooling systems must be used independently.
Can the BL-300HD be mounted on third-party support frames?
Yes. Its compact footprint and standardized mounting geometry allow compatibility with most universal lab stands and clamp systems.
What is the recommended calibration frequency?
HsiangTai recommends annual verification of speed accuracy and torque linearity using NIST-traceable tachometers and calibrated load cells, especially in regulated applications.
Is the digital timer battery-backed?
No. Timer settings are retained only while powered; loss of mains supply resets the timer.
Are spare fuses included with shipment?
Yes—two replacement fuses (type T1.6A, 250 V) are supplied in the accessory kit.