DreTop YU-3GW Magnetic Stirring Water Bath

Overview

The DreTop YU-3GW Magnetic Stirring Water Bath integrates precise temperature control with robust magnetic stirring in a compact, single-position benchtop unit. Designed for routine laboratory workflows requiring simultaneous thermal regulation and homogeneous mixing, it operates on the principle of indirect conductive heating via a U-shaped immersion heater embedded in a 304 stainless steel bath reservoir, coupled with contactless magnetic coupling between a submersible stir bar and a brushless DC drive motor. This architecture eliminates mechanical shaft seals and minimizes contamination risk—critical for applications involving sensitive biological reagents, sterile solutions, or volatile organic solvents. The system maintains stable thermal conditions across its full operating range (+5 °C to 100 °C), with a documented stability of ±0.5 °C at 37 °C—a performance benchmark aligned with ASTM E1112 and ISO 13485 environmental control requirements for QC/QA laboratories conducting enzymatic assays, dissolution testing, or sample equilibration prior to HPLC or GC analysis.

Key Features

• Intelligent PID temperature controller with auto-tuning capability, enabling adaptive compensation for varying thermal loads and media-specific heat transfer coefficients (e.g., water vs. glycerol/water mixtures)
• Digital LED display with 0.1 °C resolution and tactile touch-key interface for intuitive setpoint entry and real-time monitoring
• Brushless DC stirring motor (8 W) delivering smooth, voltage-independent rotation from 0 to 1200 rpm—ensuring consistent shear input regardless of line fluctuations
• Single-station design with 160 × 160 × 140 mm (W × D × H) 304 stainless steel bath chamber, optimized for standard 100–500 mL beakers and cylindrical vessels
• Corrosion-resistant construction: electropolished 304 SS bath and lid; high-temperature resistant polypropylene (PP) control housing; powder-coated steel enclosure for mechanical durability
• Optional safety modules—including programmable over-temperature cutoff and low-fluid-level detection—to support GLP-compliant operation and prevent dry-run damage

Sample Compatibility & Compliance

The YU-3GW accommodates a wide range of sample containers, including borosilicate glass beakers, stainless steel reaction vessels, and chemically inert PTFE-lined cups—provided external dimensions fit within the 160 × 160 mm bath opening. Its non-contact magnetic drive mechanism ensures compatibility with sealed or capped systems, making it suitable for anaerobic culture maintenance, controlled hydrolysis studies, and solvent-based extractions where headspace integrity must be preserved. The unit complies with IEC 61010-1:2010 safety standards for laboratory electrical equipment and supports traceable calibration per ISO/IEC 17025 when paired with NIST-traceable RTD probes. While not inherently 21 CFR Part 11 compliant (as it lacks audit trail functionality), its analog PID architecture permits integration into validated workflows under GMP environments when operated with documented SOPs and periodic verification logs.

Software & Data Management

The YU-3GW operates as a standalone instrument without proprietary software or USB/RS-232 connectivity. All operational parameters—including set temperature, actual bath temperature, and stirring speed—are displayed locally on the front-panel LED screen. For laboratories requiring data capture, optional third-party temperature loggers (e.g., Omega OM-CP series or Testo 177 T4) can be immersed alongside samples to record time-stamped thermal profiles. The absence of embedded firmware simplifies qualification (IQ/OQ) and reduces cybersecurity exposure—an advantage in regulated settings where device validation scope must remain narrowly defined.

Applications

• Enzyme kinetics and protein denaturation studies requiring precise isothermal incubation with continuous agitation
• Preparation of homogeneous calibration standards for spectrophotometry or ion chromatography
• Accelerated stability testing of pharmaceutical formulations under controlled thermal stress
• Extraction of plant metabolites or environmental contaminants using heated solvent-assisted methods
• Cell culture medium pre-warming and buffer equilibration prior to aseptic handling
• Educational demonstrations of Arrhenius behavior, reaction rate dependence on temperature, and thermal equilibrium principles

FAQ

Does the YU-3GW support multi-vessel independent stirring?
No—the unit features a single magnetic stir plate beneath the bath floor and is configured for one vessel per operation.
Can the bath accommodate larger containers such as 1-L beakers?
No—the maximum internal bath dimensions (160 × 160 × 140 mm) limit usable vessel height and diameter; optimal capacity is ≤500 mL.
Is the temperature sensor field-replaceable?
Yes—the CU50 RTD probe is mechanically secured and electrically interfaced via standardized terminals, allowing qualified technicians to perform replacement without recalibration.
What is the recommended maintenance interval for the heating element?
Under normal use with deionized or distilled water, no scheduled maintenance is required; however, visual inspection for scale buildup every 6 months is advised—especially when tap water is used.
Does DreTop provide factory calibration certificates?
Calibration documentation is available upon request at time of purchase; certificates include as-found/as-left temperature deviation data referenced to a NIST-traceable standard at three points (25 °C, 37 °C, and 75 °C).