YIHENG IT-09B5 Heating Magnetic Stirrer
| Brand | YIHENG |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Product Category | Domestic |
| Model | IT-09B5 |
| Instrument Type | Magnetic Stirrer |
| Max Stirring Volume | 10 L |
| Speed Range | 100–1600 rpm |
| Temperature Control Range | RT+5°C to 320°C |
Overview
The YIHENG IT-09B5 Heating Magnetic Stirrer is an engineered benchtop laboratory instrument designed for precise temperature-controlled mixing of liquid samples in research, quality control, and production environments. It operates on the principle of magnetic coupling: a microprocessor-controlled brushless DC motor rotates a high-strength permanent magnet beneath the heated aluminum platform, generating a rotating magnetic field that drives a PTFE- or glass-coated magnetic stir bar immersed in the sample vessel. Unlike convection-based hot plates, this system enables simultaneous and independent regulation of thermal input (via resistive heating of the aluminum plate) and mechanical agitation—critical for applications requiring reproducible reaction kinetics, dissolution testing, or homogeneous sample preparation under defined thermal conditions. The IT-09B5 belongs to YIHENG’s B-series, meaning it regulates and displays the surface temperature of the heating plate—not the internal solution temperature—making it suitable for processes where plate-setpoint correlation with bulk fluid behavior has been empirically validated.
Key Features
- Brushless DC motor drive ensures stable rotational output across viscosity fluctuations, extended service life (>20,000 hours), low electromagnetic interference, and bidirectional stirring capability (forward/reverse).
- Aluminum die-cast housing with corrosion-resistant composite coating provides structural rigidity, efficient heat dissipation, and ease of decontamination—essential for GLP-compliant labs handling aggressive solvents or biological media.
- Heating plate constructed from high-purity aluminum alloy with uniform thermal conductivity (≥200 W/m·K) and a ceramic-reinforced polymer top layer resistant to acid/alkali exposure and thermal shock up to 320°C.
- Integrated anti-spill liquid channel along the front edge of the control panel prevents ingress of accidental overflow into internal electronics—enhancing operational safety and long-term reliability.
- Intuitive LCD interface displays real-time speed (rpm), plate temperature (°C/°F), and countdown timer simultaneously; supports user-defined configurations including delay start, auto-reversal cycles, PID auto-tuning, alarm modes, power-on default settings, and post-timer hold-temperature maintenance.
- Multi-layer thermal protection architecture includes: (1) deviation-based overtemperature cutoff (activation at +10–30°C above setpoint), (2) absolute plate-limit shutdown (triggered at ≥330°C), (3) visual “HOT” warning indicators with flashing LED and dual-line display when plate surface exceeds 55°C (operational alert) or 45°C (post-shutdown cooling phase).
Sample Compatibility & Compliance
The IT-09B5 accommodates standard laboratory glassware (e.g., beakers, flasks, crystallization dishes) up to 10 L volume, provided appropriate stir bar geometry and size are selected per ISO 8573-1 guidelines for magnetic coupling efficiency. Its aluminum plate surface (Ø135 mm) supports flat-bottom containers with minimal warpage. While not certified to IEC 61000-6-3 (EMC) or UL 61010-1 out-of-the-box, the device conforms to GB/T 14710–2009 (Chinese Environmental Adaptation Standard) and meets basic electrical safety requirements for Class I equipment. For regulated environments, users must validate thermal uniformity (per ASTM E2251–22 Annex A1) and speed stability (per ISO 4787:2021 Section 7.3) during IQ/OQ protocols. No external temperature probe is included—solution temperature monitoring requires separate calibrated Pt100 or thermistor probes integrated via third-party data loggers.
Software & Data Management
The IT-09B5 operates as a standalone instrument without native PC connectivity or proprietary software. All parameter logging—including time-stamped speed, plate temperature, and alarm events—is performed manually by the operator. However, its RS-232 port (optional accessory) enables integration with LabVIEW™, MATLAB®, or custom SCADA systems for automated data capture. When deployed in FDA-regulated workflows, users may configure external audit-trail-capable recorders compliant with 21 CFR Part 11 requirements for electronic records and signatures. The unit supports configurable alarm outputs (TTL-level) for interfacing with building management systems or emergency shutdown circuits.
Applications
- Chemical synthesis: facilitating homogeneous reagent dispersion during exothermic/endothermic reactions under controlled thermal profiles.
- Pharmaceutical QC: supporting dissolution testing per USP , buffer equilibration, and standard solution preparation per EP 2.2.47.
- Materials science: aiding nanoparticle dispersion in polymer matrices or precursor solutions prior to spin-coating or casting.
- Environmental analysis: accelerating extraction efficiency in EPA Method 3510C (separatory funnel extraction) and digestion protocols per APHA 3111B.
- Life sciences: maintaining suspension cultures of microcarriers or hydrogel precursors during incubation steps where shear sensitivity must be balanced against mixing efficacy.
FAQ
Does the IT-09B5 measure or control solution temperature directly?
No—it controls only the heating plate surface temperature. Internal solution temperature must be monitored separately using an external probe.
What is the maximum recommended viscosity for stable stirring at 1600 rpm?
For optimal torque transmission and stir bar tracking, viscosity should remain below 10,000 mPa·s at operating temperature. Higher viscosities require reduced speed or larger-diameter stir bars.
Is the unit compatible with corrosive solvents such as concentrated HCl or NaOH?
Yes—the coated aluminum plate and sealed control electronics resist short-term exposure; however, prolonged contact or spillage beyond the containment groove may compromise longevity.
Can the IT-09B5 be used inside a fume hood?
Yes, provided ambient airflow does not exceed 0.5 m/s across the plate surface, which could induce thermal drift or stir bar instability.
What calibration documentation is supplied?
Factory calibration certificates for speed and temperature sensors are available upon request (NIST-traceable standards applied); full metrological validation remains the end-user’s responsibility per ISO/IEC 17025 requirements.
