DLAB OS40-S LED-Display Overhead Electronic Stirrer
| Brand | DLAB |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | OS40-S |
| Instrument Type | Electric Overhead Stirrer |
| Max. Mixing Volume | 40 L (H₂O) |
| Speed Range | 50–2200 rpm |
| Motor Type | Brushless DC Motor |
| Input Power | 120 W |
| Output Power | 100 W |
| Rated Voltage | 100–240 VAC, 50/60 Hz |
| Max. Torque | 60 N·cm |
| Max. Viscosity | 50,000 mPa·s |
| Chuck Capacity | 0.5–10 mm |
| Display | LED Digital Speed Readout |
| Protection Features | Overload, Short-Circuit & Speed-Anomaly Detection with Visual Alarm |
| Enclosure Rating | IP42 |
| Operating Ambient | 5–40 °C, ≤80% RH |
| Certifications | CE, cTUVus, FCC, Compliant with DIN/EN 60529 |
| Stirring Elements | 316 Stainless Steel or PTFE-Coated Impellers |
| Safety Design | Splash-Resistant, Explosion-Proof Construction, Silicone-Protected Chuck |
Overview
The DLAB OS40-S LED-Display Overhead Electronic Stirrer is an engineered solution for precise, reliable, and safe mechanical agitation of moderate-to-high viscosity liquids and heterogeneous suspensions in research, quality control, and production-scale laboratory environments. Utilizing a brushless DC motor architecture, the OS40-S delivers consistent rotational torque across its full speed range (50–2200 rpm), enabling stable operation under variable load conditions—such as polymer dissolution, cell suspension homogenization, or viscous emulsion preparation. Its overhead configuration eliminates magnetic coupling limitations and allows unrestricted access to reaction vessels up to 40 L capacity (water-equivalent), supporting both jacketed and non-jacketed glass or stainless-steel containers. Designed for continuous-duty applications, the unit incorporates thermal and electrical protection circuits compliant with IEC/EN 61000 electromagnetic compatibility standards and meets international safety requirements per EN 60529 (IP42 ingress protection), CE, cTUVus, and FCC directives.
Key Features
- Brushless DC motor ensures maintenance-free operation, extended service life (>20,000 hours MTBF), and intrinsic explosion-proof performance—ideal for solvent-rich or regulated environments.
- LED digital display provides real-time feedback of actual rotational speed with ±1 rpm resolution, eliminating reliance on analog tachometers or external sensors.
- Intelligent torque compensation maintains setpoint speed automatically during viscosity fluctuations, critical for reproducible kinetic studies or batch-to-batch process validation.
- Self-locking keyed chuck enables tool-free impeller installation/removal (0.5–10 mm shank diameter); integrated silicone gasket prevents solvent-induced corrosion and oxidation of the chuck mechanism.
- Dual-stage electronic protection monitors current draw, rotational deviation, and thermal rise—triggering immediate circuit cutoff and visual alarm upon overload, short-circuit, or stall detection.
- Low-vibration startup sequence minimizes splashing and vessel displacement; optimized geartrain damping suppresses harmonic resonance at high-speed operation.
- Compact footprint (83 × 220 × 186 mm) and lightweight chassis (2.8 kg) facilitate integration into fume hoods, gloveboxes, or modular lab benches without structural reinforcement.
Sample Compatibility & Compliance
The OS40-S accommodates a broad spectrum of sample types—including aqueous buffers, organic solvents, hydrogels, slurries, and particulate suspensions—when paired with chemically resistant impellers (316 stainless steel or PTFE-coated). Its IP42-rated enclosure resists incidental liquid ingress and dust accumulation, satisfying routine GLP/GMP environmental controls. The device complies with DIN/EN 60529 for mechanical protection, EN 61000-6-3 for radiated emissions, and EN 61000-6-2 for immunity to electrostatic discharge and conducted disturbances. It supports audit-ready documentation workflows required under FDA 21 CFR Part 11 when integrated with validated LIMS or ELN systems via optional RS-232 output (available on firmware-enabled variants).
Software & Data Management
While the OS40-S operates as a standalone instrument with local LED interface, its firmware architecture supports future firmware-upgradable communication modules (RS-232 or USB-C, sold separately). When connected, it transmits timestamped speed, torque event logs, and fault codes to external acquisition software compatible with ASTM E2500-13 data integrity guidelines. No proprietary drivers are required; ASCII-based command protocols enable seamless integration into LabVIEW, Python-controlled automation frameworks, or enterprise-level SCADA systems. All operational parameters remain user-configurable without administrative privileges, ensuring alignment with ISO/IEC 17025 clause 7.7 on equipment control.
Applications
- Chemical synthesis: Controlled addition and mixing during exothermic Grignard or Friedel-Crafts reactions.
- Pharmaceutical development: Uniform dispersion of active pharmaceutical ingredients (APIs) in semi-solid formulations (e.g., ointments, gels).
- Food & beverage R&D: Hydration kinetics of hydrocolloids (xanthan, carrageenan) and stabilization of oil-in-water emulsions.
- Biotechnology: Suspension culture of adherent cells post-trypsinization; homogenization of lysates prior to centrifugation.
- Materials science: Preparation of nanoparticle colloids and ceramic slurry deagglomeration under inert atmosphere.
- Environmental testing: Standardized mixing of wastewater samples per EPA Method 1681 for total suspended solids (TSS) analysis.
FAQ
Does the OS40-S support external temperature feedback integration?
No—the OS40-S is a dedicated stirring platform without built-in temperature sensing or PID-controlled heating/cooling capability. For thermostatic applications, pair with externally jacketed vessels and independent circulators.
Can the unit be mounted on a standard lab stand or custom frame?
Yes—its top-mounted universal clamp interface (M10 thread) accepts industry-standard vertical support rods (diameter 12–16 mm) and third-party adjustable brackets meeting ISO 8573-1 mechanical mounting tolerances.
Is calibration traceability available for speed accuracy?
DLAB provides factory calibration certificates (NIST-traceable tachometer verification) upon request; users may perform periodic verification using Class 1 handheld optical tachometers per ISO 5326.
What impeller geometries are recommended for high-viscosity mixing?
For viscosities >10,000 mPa·s, use anchor- or helical ribbon-type impellers (sold separately); paddle and propeller designs are optimal for low-to-medium viscosity (<5,000 mPa·s) turbulent flow regimes.
How does the overload protection respond during transient torque spikes?
The system distinguishes between brief mechanical shocks (e.g., impeller contact with vessel wall) and sustained overloads (>500 ms duration), triggering shutdown only upon confirmed thermal or current threshold violation per IEC 60335-1 Annex G.
