DRETOP JCS-1012 Magnetic Stirring Water Bath

Overview

The DRETOP JCS-1012 Magnetic Stirring Water Bath is an integrated laboratory instrument engineered for simultaneous temperature regulation and homogeneous magnetic agitation of aqueous or low-viscosity samples. It operates on the principle of electromagnetic induction—where a rotating magnetic field generated beneath the stainless-steel bath chamber drives PTFE-coated magnetic stir bars immersed in sample vessels—while precision PID-controlled resistive heating maintains thermal equilibrium across the water medium. Unlike standalone hotplates or immersion circulators, the JCS-1012 provides spatially uniform thermal distribution via circumferential immersion heating elements and real-time dual-sensor feedback, making it suitable for applications requiring both kinetic mixing and thermally stable reaction environments—such as hydrolysis kinetics, enzyme activity assays, dissolution testing, and buffer equilibration.

Key Features

• Two independent stirring positions, each supporting up to 2000 mL volume, enabling parallel processing of duplicate or comparative samples without cross-contamination.
• Microprocessor-based PID temperature controller with ±0.1 °C setpoint accuracy and ±0.5 °C stability over time—validated using calibrated PT100-grade sensors embedded in the bath wall and fluid interface.
• Dual LED display showing both setpoint and real-time bath temperature simultaneously, with backlit readability under standard lab lighting conditions.
• Adjustable stirring speed from standstill to 2400 rpm via continuous analog control or discrete digital input, ensuring reproducible shear profiles across viscosity ranges typical of aqueous buffers, saline solutions, and diluted organic media.
• Electropolished 304 stainless steel inner tank and lid, combined with multi-layer insulated housing and integrated drain valve, minimize heat loss and simplify maintenance while resisting corrosion from repeated exposure to water, salts, and mild reagents.
• Power-fail recovery function retains user-defined parameters—including temperature setpoint, stirring speed, and timer duration—ensuring experimental continuity after unexpected outages.

Sample Compatibility & Compliance

The JCS-1012 accommodates standard laboratory glassware including beakers (up to 2000 mL), Erlenmeyer flasks, and jacketed reactors placed directly into the water bath. Its open-bath architecture supports optional accessories such as vertical support rods and condenser clamps for reflux or distillation setups. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, the device’s deterministic control logic, non-volatile parameter storage, and traceable temperature calibration path align with foundational requirements for GLP-compliant laboratories performing method development or routine QC testing. Users may document calibration against NIST-traceable reference thermometers and maintain logbooks per internal SOPs.

Software & Data Management

The JCS-1012 operates as a standalone hardware platform without proprietary software or USB/RS232 connectivity. All operational parameters—including temperature setpoint, stirring speed, countdown timer, and alarm thresholds—are configured locally via membrane keypad and retained in EEPROM memory. For laboratories requiring electronic records, external data loggers (e.g., Omega OM-DAQPRO or Testo 176 T4) can be interfaced using standard K-type thermocouple inputs and analog tachometer outputs (available upon request with OEM modification). Audit trails must be maintained manually or through LIMS-integrated environmental monitoring systems.

Applications

• Chemical synthesis requiring precise thermal initiation and homogenization—e.g., esterification, diazotization, and nucleophilic substitution reactions.
• Biological sample preparation including cell lysis buffer equilibration, antigen-antibody incubation, and DNA hybridization protocols.
• Pharmaceutical quality control: dissolution rate testing per USP , disintegration time assessment, and standard solution tempering prior to HPLC injection.
• Food safety analysis: extraction efficiency optimization for pesticide residues, heavy metal leaching studies, and thermal stability evaluation of emulsifiers.
• Environmental testing: BOD incubation support, nutrient solution conditioning for algal growth assays, and soil suspension homogenization.

FAQ

Is the JCS-1012 suitable for use with organic solvents?
No. The unit is designed exclusively for aqueous or water-miscible media. Immersion of flammable or low-boiling-point solvents (e.g., acetone, ethanol, ether) poses fire and vapor pressure hazards due to open-bath construction and lack of explosion-proof certification.
Can I calibrate the temperature sensor myself?
Yes—using a NIST-traceable reference thermometer immersed at the center of the bath at operating depth, users may perform offset adjustment per manufacturer instructions. Full recalibration requires factory service.
What is the maximum recommended operating duration at 100 °C?
Continuous operation at 100 °C is permissible for up to 72 hours provided ambient ventilation meets minimum 15 ACH airflow and bath water level remains ≥2 cm above heater elements.
Does the unit include overload or dry-run protection?
Yes—a thermal cutoff switch deactivates heating if internal chassis temperature exceeds 120 °C; however, no liquid-level sensor is installed—users must monitor water volume manually.
Are replacement stir bars included?
One PTFE-coated magnetic stir bar (30 mm × 8 mm) is supplied per station. Additional stir bars are available as optional accessories (Cat. No. SB-308-PTFE).