Shanghai Yoke 601 Super Constant-Temperature Water Bath

Overview

The Shanghai Yoke 601 Super Constant-Temperature Water Bath is an engineered thermal stability platform designed for precision temperature maintenance in laboratory-scale chemical, biochemical, and pharmaceutical applications. It operates on the principle of convective heat transfer within a fully enclosed, electropolished stainless steel bath chamber, regulated by a digital PID controller integrated with a dual-integration high-accuracy analog-to-digital conversion circuit and low-drift operational amplifiers. This architecture ensures minimal thermal overshoot and rapid thermal equilibration—typically under 15 minutes from ambient to 80 °C with a standard water load. The system employs far-infrared heating elements distributed uniformly along the chamber base and sidewalls to minimize radial and vertical thermal gradients. Combined with an integrated magnetic stirrer and internal recirculation pump (6 L/min), the unit achieves exceptional temperature homogeneity (±0.3 °C across the full working volume), meeting the spatial uniformity requirements specified in ISO 17025-accredited calibration procedures for auxiliary thermal equipment.

Key Features

• Electropolished 304 stainless steel bath tank—resistant to corrosion from aqueous buffers, mild acids, and organic solvents commonly used in extraction and hydrolysis protocols
• Digital PID temperature controller with 0.1 °C resolution and real-time LED display—supports stable setpoint retention over extended durations (>72 h) without manual intervention
• Far-infrared heating system with symmetrical emitter layout—reduces localized hot spots and improves long-term thermal repeatability (RSD < 0.15% over 24 h at 60 °C)
• Integrated magnetic stirring mechanism—enables homogeneous sample agitation without introducing external mechanical coupling or seal degradation risks
• Internal circulation loop powered by a sealed stainless steel centrifugal pump—designed for continuous duty at elevated temperatures with no lubricant exposure to the bath medium
• Thermal insulation jacket with low-conductivity mineral wool—minimizes ambient heat loss and improves energy efficiency during overnight operation

Sample Compatibility & Compliance

The 601 water bath accommodates standard laboratory glassware including round-bottom flasks (up to 2 L), beakers (50–1000 mL), test tubes, and immersion-type probes. Its open-top configuration and 180 mm bath depth support both partial and full submersion of reaction vessels. The unit complies with IEC 61010-1:2010 safety standards for electrical equipment used in laboratory environments and meets CE marking requirements for electromagnetic compatibility (EMC Directive 2014/30/EU). While not certified for GMP production environments, its thermal performance aligns with method suitability criteria referenced in USP “Temperature Calibration of Laboratory Equipment” and supports GLP-compliant documentation when paired with external NIST-traceable thermometry.

Software & Data Management

The 601 operates as a standalone analog-digital hybrid instrument with no embedded firmware or network interface. All control logic resides in discrete hardware circuits—ensuring deterministic response times and immunity to software crashes or cybersecurity vulnerabilities. For laboratories requiring audit trails, optional external data loggers (e.g., Omega OM-DAQPRO-5300 series) may be connected via PT100 sensor inputs to record time-stamped temperature profiles. The unit’s analog output signal (0–5 V DC proportional to measured temperature) is compatible with most SCADA and LIMS systems supporting voltage-input acquisition modules. No FDA 21 CFR Part 11 compliance features are included; however, manual logbook entries paired with periodic calibration certificates satisfy basic ISO/IEC 17025 documentation requirements.

Applications

• Controlled-temperature solvent evaporation and rotary evaporation pre-chilling
• Enzyme activity assays requiring strict thermal regulation between 25–45 °C
• Hydrolysis and esterification reactions conducted under reflux conditions
• Calibration of liquid-in-glass thermometers and digital probe sensors
• Pre-warming of culture media prior to sterile filtration or autoclaving
• Accelerated stability testing of pharmaceutical formulations per ICH Q1A(R2) guidelines (when used as ancillary thermal conditioning equipment)

FAQ

Does the 601 support external temperature probe feedback for improved accuracy?
No—the unit relies exclusively on its built-in Pt100 sensor located near the center of the bath floor. External probe integration is not supported.
Can the circulation pump be configured for external recirculation?
No—only internal circulation is available. The pump lacks inlet/outlet ports for closed-loop external plumbing.
Is the magnetic stirrer speed adjustable?
No—the stirrer operates at a fixed rotational speed optimized for mixing uniformity without inducing vortex formation in standard vessel configurations.
What is the maximum recommended operating duration at 100 °C?
Continuous operation up to 96 hours is validated under load; however, routine shutdown every 48 h is advised to extend heater element service life.
Does the unit include a drain valve for bath fluid replacement?
Yes—a front-mounted brass drain valve with Teflon-sealed thread enables rapid, spill-free fluid exchange without disassembly.