Shanghai Youyi DK-S12 Dual-Well Electric Constant-Temperature Water Bath

Overview

The Shanghai Youyi DK-S12 Dual-Well Electric Constant-Temperature Water Bath is a precision-engineered laboratory thermal management system designed for reproducible, stable heating and temperature maintenance of samples in aqueous or liquid-immersed configurations. Operating on the principle of resistive immersion heating—where U-shaped stainless steel-sheathed heating elements directly contact the bath medium—the unit delivers rapid thermal equilibration and minimal energy loss. Its dual-well configuration enables independent or parallel processing of two sample sets under identical or differentiated thermal conditions (within the same setpoint), supporting comparative assays, calibration verification, or throughput optimization in quality control and research workflows. Engineered for continuous operation in ISO/IEC 17025-accredited laboratories, it complies with general safety requirements outlined in IEC 61010-1 for electrical equipment used in laboratory environments.

Key Features

• Dual independent wells (each 300 × 150 × 110 mm internal dimensions) with shared microprocessor-based PID temperature controller, enabling synchronized or staggered setpoint programming
• High-resolution 0.1°C temperature setting and monitoring via backlit LCD display; actual chamber stability maintained within ±0.1°C at setpoint (typical deviation ≤ ±0.3°C over 24 h at 37°C)
• U-shaped MgO-insulated heating elements fully immersed in the bath fluid—optimized for thermal transfer efficiency and reduced power consumption per degree rise
• Stainless steel inner tank (SUS304) and powder-coated cold-rolled steel outer casing ensure long-term corrosion resistance and mechanical durability under repeated thermal cycling
• Over-temperature protection circuit with audible and visual alarm activates automatically when internal sensor detects deviation >2°C above user-defined limit, halting heating output until manual reset
• Optional timer function (1–999 minutes) supports unattended operation for standardized protocols such as enzyme incubation, dissolution testing, or sample thawing

Sample Compatibility & Compliance

The DK-S12 accommodates standard laboratory glassware including beakers (up to 1000 mL), Erlenmeyer flasks, test tubes, and sample vials placed directly into either well. Its open-bath design allows unrestricted access for stirring, sampling, or probe insertion. The unit meets general electrical safety standards per IEC 61010-1 and conforms to GB/T 2894-2008 (Chinese national standard for warning signs) and GB 4706.1-2005 (household and similar electrical appliances – safety). While not certified to UL or CE for export markets without additional regional conformity assessment, its construction and control architecture align with foundational requirements for GLP-compliant thermal platforms used in method validation (e.g., USP , ASTM E2915-22 for thermal stability evaluation).

Software & Data Management

The DK-S12 operates via embedded firmware with no external software dependency. All operational parameters—including set temperature, real-time bath temperature, elapsed time, and alarm status—are displayed locally on the LCD interface. For laboratories requiring audit trails or electronic records, optional RS-232 or USB-to-serial adapters (sold separately) enable connection to PC-based logging applications. When integrated with validated data acquisition systems compliant with FDA 21 CFR Part 11, timestamped temperature logs can be generated for batch documentation, IQ/OQ/PQ reporting, or regulatory submissions. No cloud connectivity or proprietary software suite is included or required.

Applications

• Controlled-temperature incubation of biological reagents, cell cultures, and diagnostic kits (e.g., ELISA plate pre-warming at 37°C)
• Support of analytical procedures including Soxhlet extraction, Kjeldahl digestion, and distillation setups requiring precise reflux control
• Standardization of viscosity measurements using capillary or rotational viscometers requiring thermostatted baths per ASTM D445 or ISO 3104
• Accelerated stability testing of pharmaceutical formulations per ICH Q1A(R2) guidelines (e.g., 40°C/75% RH conditioning support via water bath–controlled humidity chambers)
• Pre-heating and temperature equilibration of solvents prior to HPLC mobile phase preparation or GC injection
• Thermal treatment of environmental samples (e.g., BOD incubation, sediment elution studies) in municipal and industrial compliance labs

FAQ

What is the maximum recommended operating temperature for continuous use?
The DK-S12 is rated for sustained operation up to 100°C; however, prolonged use above 95°C may accelerate evaporation and require more frequent refilling and level monitoring.
Can the two wells operate at different temperatures simultaneously?
No—the DK-S12 features a single shared temperature controller; both wells maintain identical setpoints. Independent dual-zone control requires models such as the DK-S24 or custom-configured industrial variants.
Is the bath compatible with corrosive solutions like acid baths or saltwater?
The SUS304 stainless steel tank resists mild acidity and saline exposure; however, extended use with strong oxidizers (e.g., nitric acid) or chlorinated brines is not recommended without supplemental passivation or protective liners.
Does the unit include a drain valve for easy emptying?
No—draining requires manual tilting or siphoning. Optional accessory drain kits are available through Shanghai Youyi’s OEM service channel upon request.
What calibration documentation is provided with shipment?
Each unit ships with a factory calibration certificate traceable to NIM (National Institute of Metrology, China), verifying temperature accuracy at 37°C, 60°C, and 100°C against reference PRTs (Pt100 sensors) with uncertainty ≤ ±0.15°C (k=2).