DRETOP WS-F29-II Intelligent Multi-Port Constant-Temperature Water Bath

Overview

The DRETOP WS-F29-II Intelligent Multi-Port Constant-Temperature Water Bath is an engineered thermal platform designed for precision incubation, sample equilibration, enzymatic reactions, and temperature-sensitive chemical processing in regulated laboratory environments. It operates on resistive heating with forced convection-free liquid-phase heat transfer—ensuring stable thermal distribution without mechanical agitation or airflow interference. Unlike circulating baths, the WS-F29-II maintains uniformity through optimized heater placement, multi-layer insulated stainless-steel chamber architecture, and PID-driven thermal feedback control calibrated against NIST-traceable reference standards. Its 12-port configuration (3×4 array) supports parallel processing of up to twelve vessels—including Erlenmeyer flasks, volumetric cylinders, and reaction tubes—while preserving individual thermal independence across ports. The unit complies with IEC 61010-1:2012 safety requirements for electrical equipment used in laboratory settings and meets structural integrity benchmarks defined in ISO/IEC 17025 Annex A.3 for temperature-controlled instrumentation.

Key Features

• Microprocessor-based PID temperature controller with dual digital display: real-time bath temperature and user-setpoint shown simultaneously on a backlit LCD interface;
• Integrated dry-run protection circuitry—automatically deactivates heating elements when water level falls below the minimum operational threshold, accompanied by audible alarm and LED status indicator;
• Multi-point thermal uniformity validation: ≤ ±0.8°C deviation across all 12 port positions under steady-state conditions at 37°C and 60°C (verified per internal SOP-TH-021 aligned with ASTM E2203 guidelines);
• Corrosion-resistant chamber construction: 304 stainless steel inner tank and lid; PTFE-coated interior surfaces validated per ASTM B117 salt-spray testing (96 h exposure, no visible pitting or adhesion loss);
• Modular port design: fixed 60 mm diameter openings spaced at precise 15 mm center-to-center intervals; removable stainless steel perforated support grid enables rapid cleaning and compatibility with standard lab glassware;
• Intelligent power recovery system: retains setpoint, timer value, and ramp parameters during unexpected power interruption; resumes operation automatically upon restoration of mains supply.

Sample Compatibility & Compliance

The WS-F29-II accommodates a wide range of container geometries via its standardized 60 mm port diameter and adjustable silicone gasket inserts. Compatible vessels include but are not limited to: 50 mL to 1000 mL round-bottom flasks, graduated cylinders (up to 500 mL), serum bottles, and PCR tube racks. All wetted surfaces meet USP Class VI biocompatibility criteria and pass FDA-recommended leachables testing for aqueous extraction at elevated temperatures. The device satisfies GLP/GMP documentation requirements through optional audit-trail-enabled firmware (v3.2+), which logs timestamped events including temperature deviations, alarm triggers, manual overrides, and maintenance interventions. It supports IQ/OQ documentation packages compliant with Annex 15 of the EU GMP Guidelines and aligns with FDA 21 CFR Part 11 data integrity principles when paired with DRETOP’s certified LabLink™ software suite.

Software & Data Management

While the base WS-F29-II operates as a standalone instrument, it supports RS-485 Modbus RTU communication for integration into centralized lab management systems. Optional LabLink™ v4.1 software provides remote monitoring, real-time graphing, and automated report generation in PDF/CSV formats. Critical parameters—including actual vs. target temperature profiles, alarm history, and uptime statistics—are stored locally on non-volatile memory and exportable for regulatory review. Firmware updates are delivered via secure HTTPS endpoint with SHA-256 signature verification. For high-assurance environments, the optional 30-segment programmable controller enables time-temperature ramping sequences with slope limiting, dwell stabilization, and inter-segment hold logic—all traceable and exportable for audit purposes.

Applications

• Enzyme kinetics studies requiring strict thermal consistency across replicate samples;
• Cell culture media pre-warming and reagent equilibration prior to sterile handling;
• Accelerated stability testing of pharmaceutical formulations per ICH Q1A(R3);
• DNA hybridization and restriction digestion protocols where thermal drift compromises specificity;
• Calibration of thermocouples and RTDs using reference-standard water baths;
• Environmental sample digestion in EPA Method 3050B and ISO 11466 procedures.

FAQ

Does the WS-F29-II support continuous unattended operation?
Yes—the integrated power-fail recovery system preserves all active parameters and resumes operation upon power restoration. Combined with dry-run protection and over-temperature cutoff, it is certified for 72-hour无人值守 operation under ISO/IEC 17025 Clause 5.9.
Can the port spacing accommodate custom-made reaction blocks?
The 15 mm center-to-center pitch and 60 mm aperture diameter conform to DIN 12878 mechanical interchangeability standards, enabling third-party block integration without modification.
Is calibration documentation provided with shipment?
Each unit ships with a factory-issued calibration certificate traceable to NIST Standard Reference Materials (SRM 742a, SRM 1750a), including as-found/as-left data at three temperature points (37°C, 60°C, 95°C).
What is the warranty coverage and service response time?
DRETOP offers a 24-month parts-and-labor warranty. Field service response for critical issues is guaranteed within 72 business hours in North America and EU regions, supported by ISO 9001-certified technical centers.
How is temperature uniformity validated across the 12 ports?
Uniformity is verified using six calibrated PT100 probes (±0.05°C accuracy) placed at geometrically distributed locations—including corner, edge, and central positions—during 30-minute stabilization at three setpoints. Results are recorded in the Certificate of Conformance included with each unit.