Shanghai Youyi DK-S24 Dual-Row Four-Position Electric Constant-Temperature Water Bath

Overview

The Shanghai Youyi DK-S24 Dual-Row Four-Position Electric Constant-Temperature Water Bath is a precision-engineered laboratory thermal management system designed for reproducible, stable heat transfer in aqueous environments. It operates on the principle of conduction-based thermal equilibration: heat generated by an immersed U-shaped stainless steel sheathed heating element is uniformly distributed throughout the water medium via natural convection and controlled circulation, enabling consistent sample temperature maintenance across multiple vessels simultaneously. Engineered for routine use in quality control laboratories, academic teaching labs, and R&D facilities, the DK-S24 supports applications requiring precise thermal conditioning between ambient +5°C and 100°C—well within the operational envelope defined by ISO 17025–compliant calibration protocols for liquid-phase temperature stability testing.

Key Features

• Dual-row, four-position configuration enables parallel processing of up to four standard-sized beakers or flasks (e.g., 100–500 mL), optimizing throughput without compromising thermal homogeneity.
• Microprocessor-controlled PID temperature regulation delivers ±0.1°C setpoint accuracy and maintains ±0.5°C uniformity across the 300 × 300 × 110 mm working chamber (10 L capacity), verified per ASTM E1112 guidelines for bath performance validation.
• U-shaped sheathed heating element—constructed from high-purity stainless steel tubing filled with compacted magnesium oxide insulation and embedded resistance wire—is fully submerged to minimize thermal lag and maximize energy transfer efficiency (>92% thermal coupling efficiency under steady-state conditions).
• Corrosion-resistant 304 stainless steel inner tank and lid ensure long-term integrity when exposed to repeated thermal cycling, aqueous salts, weak acids, or alkaline solutions typical in extraction and hydrolysis workflows.
• Electrostatically applied powder-coated carbon steel outer housing provides mechanical durability and chemical resistance against common lab solvents and cleaning agents.
• Integrated over-temperature protection triggers audible and visual alerts if internal sensor readings exceed user-defined safety thresholds, safeguarding both samples and operator compliance with IEC 61010-1 safety standards.

Sample Compatibility & Compliance

The DK-S24 accommodates standard laboratory glassware including borosilicate beakers, Erlenmeyer flasks, test tubes, and graduated cylinders. Its open-bath design permits direct immersion of containers up to 110 mm in height, with unrestricted access for stirring, sampling, or pH probe insertion. The unit complies with general-purpose electrical safety requirements per IEC 61010-1:2010 (Edition 3) and meets electromagnetic compatibility criteria outlined in EN 61326-1:2013. While not certified for Class I Division 1 hazardous locations, it is suitable for general laboratory environments operating under GLP and basic GMP-aligned workflows where documented temperature traceability is maintained through external calibration logs.

Software & Data Management

The DK-S24 operates as a standalone analog-digital hybrid instrument with no embedded data logging or network interface. Temperature setpoints and real-time readings are displayed on a backlit LCD panel with 0.1°C resolution. For regulatory traceability, users are advised to integrate the unit into validated environmental monitoring systems using external calibrated PT100 probes connected to compliant data acquisition hardware (e.g., Keysight 34972A or Omega OM-DAQPRO-5300). When deployed in FDA-regulated settings, periodic verification against NIST-traceable references—per USP and ISO/IEC 17025 clause 6.4.10—is required to support audit readiness and maintain instrument qualification status (IQ/OQ documentation templates available upon request).

Applications

• Controlled-temperature enzymatic reactions and protein denaturation studies requiring narrow thermal windows.
• Standardized dissolution testing of pharmaceutical dosage forms per USP , where bath temperature stability directly impacts release kinetics.
• Pre-warming reagents and culture media prior to microbiological assays or cell line passaging.
• Accelerated aging studies of polymer films and adhesives under ISO 2812-3 humidity-free thermal stress conditions.
• Distillation support for solvent recovery and concentration steps in organic synthesis workflows.
• Calibration of liquid-in-glass thermometers and digital temperature sensors using fixed-point reference baths.

FAQ

What is the maximum recommended fill level for the DK-S24 bath chamber?

The water level should be maintained between 30 mm and 100 mm above the heater element to ensure full immersion and prevent dry-firing. Do not exceed the marked “MAX” line engraved on the interior sidewall.
Can the DK-S24 be used with non-aqueous fluids such as silicone oil or glycerol?

No. The heater design and thermal cut-off logic are optimized for water-based media only. Use of high-viscosity or low-thermal-conductivity fluids may cause localized overheating and void the warranty.
Is the DK-S24 compatible with external temperature controllers or programmable ramp profiles?

It does not feature analog voltage output or RS-232/USB connectivity. Integration with external controllers requires third-party solid-state relays and independent PID modules calibrated to the unit’s internal sensor output.
How often should the DK-S24 undergo preventive maintenance?

Inspect heater integrity and tank corrosion semiannually; descale mineral deposits quarterly in hard-water regions using 5% citric acid solution at 60°C for 2 hours, followed by thorough rinsing.
Does the unit include a calibration certificate?

Factory calibration is performed pre-shipment using traceable reference standards, but formal ISO/IEC 17025 calibration certificates require separate purchase and on-site verification by an accredited provider.