DRETOP TWS-16 Precision Water Bath
| Brand | DRETOP |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Direct Manufacturer |
| Model | TWS-16 |
| Operating Temperature Range | RT + 5°C to 100°C |
| Temperature Control Accuracy | ±0.1°C |
| Bath Capacity | 14.9 L |
| Heating Power | 1500 W |
| External Dimensions (W×D×H) | 1040 × 200 × 210 mm |
Overview
The DRETOP TWS-16 Precision Water Bath is a laboratory-grade constant-temperature immersion system engineered for reproducible thermal control in analytical, biochemical, and quality control workflows. It operates on the principle of convection-driven liquid-phase heat transfer, utilizing a fully immersed stainless-steel heating element and high-fidelity PID-controlled thermal regulation to maintain stable bath temperatures across its full operating range (RT + 5°C to 100°C). Designed for continuous-duty operation in regulated environments, the unit delivers uniform thermal distribution with minimal spatial gradient (<0.3°C across bath volume under steady-state conditions), supporting critical applications such as enzyme incubation, sample thawing, dissolution testing, and solvent evaporation where thermal consistency directly impacts assay validity.
Key Features
- Microprocessor-based PID temperature controller with dual digital display—simultaneously showing setpoint and real-time bath temperature—with 0.1°C resolution and ±0.1°C control accuracy.
- Intelligent power management architecture featuring automatic anti-dry-burn protection: integrated water-level sensor triggers immediate heater cutoff and audible/visual alarm when fluid level falls below safe operational threshold.
- Robust stainless-steel inner chamber (304 grade) with optional PTFE-coated variant (ASTM B117 certified for 500-hour salt-spray resistance), ensuring long-term corrosion resistance against acidic, alkaline, or organic solvents.
- Modular perforated stainless-steel support grid and interchangeable silicone-rubber collars accommodate round-bottom flasks, test tubes, and graduated cylinders ranging from 10 mL to 5 L capacity.
- Integrated power-fail recovery system: non-volatile memory retains all active parameters—including set temperature, elapsed time, and timer settings—enabling seamless resumption after unexpected power interruption.
- Front-panel programmable timer (1–9999 minutes) with auto-shutdown function; optional 30-segment programmable controller available for multi-step thermal profiles (e.g., ramp-hold-cool sequences).
Sample Compatibility & Compliance
The TWS-16 accommodates standard laboratory glassware via its adjustable collar system and open-bath geometry, supporting vessels up to 180 mm in diameter. Its 14.9 L working volume enables simultaneous processing of multiple samples without compromising thermal homogeneity. The device complies with IEC 61010-1:2010 safety standards for electrical equipment used in laboratory environments. When configured with optional data-logging firmware and audit-trail-enabled software, it supports GLP and GMP compliance requirements—including 21 CFR Part 11–compatible electronic records, user-access controls, and tamper-evident event logs—for regulated pharmaceutical, clinical, and environmental testing laboratories.
Software & Data Management
While the base model operates via standalone front-panel interface, the optional RS-485 communication module enables integration with LabVIEW, MATLAB, or custom SCADA systems for remote monitoring and centralized fleet management. With the add-on programmable controller, users define complex thermal protocols with up to 30 segments, each specifying target temperature, dwell time, and ramp rate. All configuration changes, alarm events, and temperature deviations are timestamped and stored locally (up to 30 days of 1-second-interval data), exportable via USB or serial interface in CSV format for traceability and QA documentation.
Applications
- Dissolution testing per USP and Ph. Eur. 2.9.3 protocols using calibrated bath temperature stability.
- Enzyme kinetics studies requiring precise thermal conditioning over extended durations (e.g., 4–72 h incubations at 37°C or 60°C).
- Preparation of calibration standards and reference materials under ISO/IEC 17025–compliant thermal environments.
- Controlled evaporation of volatile solvents during sample concentration prior to GC-MS or HPLC analysis.
- Thermal equilibration of viscometry baths, density meters, and refractometers in metrology labs.
- Stabilization of reagent solutions during ELISA, PCR setup, or cell culture media preparation.
FAQ
What is the maximum recommended operating temperature for continuous use?
The TWS-16 is rated for sustained operation at 100°C; however, for optimal longevity of seals and electronics, prolonged use above 95°C should be verified against local ambient humidity and ventilation conditions.
Does the unit include overtemperature protection independent of the PID controller?
Yes—a redundant mechanical thermostat (cut-off at 105°C ±2°C) provides hardware-level fail-safe protection, meeting IEC 61010-1 Class II insulation requirements.
Can the bath be operated with deionized water or glycerol/water mixtures?
Deionized water is compatible; glycerol-based fluids require verification of viscosity impact on convection efficiency and may necessitate recalibration of temperature sensor response time.
Is the stainless-steel interior electropolished or passivated?
Standard units feature mechanically polished 304 stainless steel; electropolishing and citric acid passivation are available as custom-order options for enhanced corrosion resistance in aggressive chemical environments.
How often does the temperature sensor require calibration verification?
Per ISO/IEC 17025 guidelines, annual calibration against an NIST-traceable reference thermometer is recommended; internal diagnostics log sensor drift trends to aid predictive maintenance scheduling.
