SiLe HD2015W Constant-Speed Electric Stirrer
| Brand | SiLe |
|---|---|
| Model | HD2015W |
| Type | Electric Stirrer |
| Max. Stirring Volume | 30 L |
| Speed Range | 30–1300 rpm |
| Motor Power | 150 W |
| Torque | 900 mN·m |
| Viscosity Range | 0–100,000 mPa·s |
| Clamp Capacity | ≤Φ13 mm |
| Support Rod | Φ14×180 mm |
| Dimensions (W×D×H) | 320×220×770 mm |
| Weight | 11 kg |
| Control | Digital, 10-step tactile speed adjustment |
| Direction | Reversible |
| Input Voltage | AC 100–230 V |
| Compliance | CE-marked for laboratory use in EU markets |
| Origin | Shanghai, China |
Overview
The SiLe HD2015W Constant-Speed Electric Stirrer is an engineered solution for reproducible, low-to-medium viscosity mixing tasks in academic, industrial QC, and pharmaceutical development laboratories. Designed around a digitally controlled, brushless DC motor architecture, the HD2015W implements deep-closed-loop speed regulation to maintain consistent rotational output across its full 30–1300 rpm range — including at low speeds where torque demand increases significantly. Unlike open-loop analog stirrers, this system dynamically adjusts power delivery to sustain setpoint speed under variable load conditions (e.g., increasing medium viscosity or vessel geometry changes), ensuring stable shear input during dissolution, suspension preparation, buffer equilibration, or reagent homogenization. Its reversible rotation capability supports specialized protocols requiring bidirectional agitation — such as preventing vortex-induced sedimentation or optimizing particle dispersion in heterogeneous systems.
Key Features
- Digital 10-step tactile speed control with real-time RPM feedback and ±1% speed stability (load-dependent)
- High-torque 150 W motor delivering 900 mN·m peak torque — optimized for viscous media up to 100,000 mPa·s
- Reversible rotation function activated via dedicated front-panel switch; direction change occurs without motor coast-down delay
- Robust aluminum-alloy support column (Φ14 mm × 180 mm) with dual-axis adjustable clamp for precise positioning of stirring shafts and overhead mixers
- Universal chuck accepts standard stirring rods and impellers with diameters ≤13 mm; compatible with PTFE-coated, glass, stainless steel, and custom-specified shafts
- CE-compliant power supply (AC 100–230 V, 50/60 Hz) with integrated thermal overload protection and EMI filtering
- Compact footprint (320 × 220 × 770 mm) and 11 kg mass ensure benchtop stability during high-torque operation
Sample Compatibility & Compliance
The HD2015W accommodates vessels from 50 mL beakers to 30 L jacketed reactors, supporting common labware materials including borosilicate glass, polypropylene, and stainless steel. It is routinely deployed in applications compliant with ASTM D1209 (color measurement sample prep), USP (dissolution apparatus qualification), and ISO 8502-12 (coating suspension testing). While not inherently GLP/GMP-certified, its digital control architecture enables traceable operation logs when integrated with external data acquisition systems. The unit meets IEC 61010-1 safety requirements for laboratory electrical equipment and carries CE marking per Directive 2014/30/EU (EMC) and 2014/35/EU (LVD).
Software & Data Management
The HD2015W operates as a standalone instrument with no embedded firmware-based software or network interface. All operational parameters are set manually via tactile controls; no USB, RS-232, or Ethernet connectivity is provided. For audit-trail compliance in regulated environments, users may pair the stirrer with third-party digital timers, RPM loggers, or programmable power supplies that record timestamped speed events. When used in conjunction with validated laboratory information management systems (LIMS), manual entry of operating conditions (speed, duration, vessel ID) satisfies basic 21 CFR Part 11 documentation requirements for non-automated equipment.
Applications
- Preparation of homogeneous aqueous and organic solutions for spectroscopic analysis (UV-Vis, FTIR)
- Suspension of insoluble APIs during formulation development and stability studies
- Buffer and media conditioning in microbiology and cell culture workflows
- Mixing of polymer solutions and colloidal dispersions prior to rheological or particle size characterization
- Standardized agitation in accelerated stability chambers per ICH Q1A(R2) guidelines
- Supporting ASTM D2196 (viscosity of paints) and ISO 2557-2 (plasticizer dispersion testing)
FAQ
Does the HD2015W support analog or digital speed control?
It features fully digital speed regulation with 10 discrete steps selected via tactile switches — no analog potentiometer or external signal input is supported.
Can the stirrer be integrated into automated laboratory systems?
No native communication interface is available; integration requires external hardware (e.g., relay-controlled power cycling or optical tachometer feedback loops).
What is the maximum recommended viscosity for continuous operation?
Continuous duty is validated up to 100,000 mPa·s using standard anchor or paddle impellers in 20–30 L vessels at ≤600 rpm.
Is the motor brushless?
Yes — the unit employs a maintenance-free brushless DC motor with thermal cutoff protection.
Does it meet FDA or ISO 13485 requirements?
As a Class I general-purpose laboratory device, it carries CE marking but is not certified to ISO 13485 or FDA QSR; validation must be performed by the end user per their quality system.
