Chu Ding Technology CD-WB-300 Single-Well Digital Temperature-Controlled Water Bath
| Brand | Chu Ding Technology |
|---|---|
| Origin | Shanghai, China |
| Model | CD-WB-300 (Single-Well, 300 W) |
| Chamber Dimensions | 160 × 170 × 90 mm |
| Power Rating | 300 W |
| Temperature Range | Ambient +5 °C to 100 °C |
| Temperature Control Accuracy | ±0.5 °C |
| Display | LED digital controller with PID algorithm |
| Construction | Stainless steel inner tank and lid, electrostatically painted outer housing |
| Compliance | CE-marked, conforms to IEC 61010-1 for laboratory electrical safety |
Overview
The Chu Ding Technology CD-WB-300 Single-Well Digital Temperature-Controlled Water Bath is a precision-engineered laboratory instrument designed for stable, uniform thermal conditioning of samples in aqueous or low-viscosity liquid media. Operating on resistive heating principles with integrated PID-based digital temperature regulation, the unit maintains setpoint stability within ±0.5 °C across its full operating range (ambient +5 °C to 100 °C). Its single-well configuration provides dedicated thermal control for one sample vessel—ideal for applications requiring isolation, reproducibility, and minimal cross-contamination risk. The bath’s stainless steel tank and lid ensure long-term resistance to corrosion from water, saline solutions, and mild chemical exposure, while the electrostatically coated exterior enhances durability and ease of cleaning in shared lab environments.
Key Features
- Single-well design (160 × 170 × 90 mm chamber) optimized for consistent heat transfer and rapid thermal equilibration
- Digital LED controller with real-time temperature readout and adjustable setpoint resolution of 0.1 °C
- PID temperature control algorithm minimizing overshoot and improving steady-state stability
- 300 W heating element delivering efficient thermal response without excessive power draw
- Stainless steel 304 inner tank and lid—non-porous, non-reactive, and compatible with routine autoclaving or chemical disinfection protocols
- Over-temperature protection circuit automatically deactivates heating if internal sensor detects deviation beyond safety threshold
- Low-profile footprint (approx. 220 × 240 × 220 mm overall) suitable for benchtop integration in space-constrained laboratories
Sample Compatibility & Compliance
The CD-WB-300 accommodates standard laboratory glassware including beakers (up to 1000 mL), test tubes, centrifuge tubes, and culture flasks. Its open-bath geometry supports immersion of vessels with varying heights and diameters, provided total liquid volume does not exceed 3.5 L. The unit complies with IEC 61010-1:2010 for safety requirements of electrical equipment for measurement, control, and laboratory use. While not certified for Class I Division 1 hazardous locations, it meets general-purpose laboratory safety standards applicable to non-explosive, non-pressurized thermal equipment. No regulatory certification for GLP/GMP audit trails is included; however, the digital controller logs no operational data—users must implement external documentation for traceability per ISO/IEC 17025 or FDA 21 CFR Part 11 requirements.
Software & Data Management
The CD-WB-300 operates as a standalone analog-digital hybrid system with no embedded firmware, network interface, or software connectivity. All control and monitoring occur locally via the front-panel LED display and tactile push-button interface. No data export, remote access, or PC synchronization capabilities are provided. For laboratories requiring electronic recordkeeping, external USB or RS-232 temperature loggers (e.g., Omega OM-EL-USB-TC or Testo 176 T4) may be deployed alongside the bath to capture time-stamped temperature profiles. The absence of onboard memory or audit trail functionality means manual entry remains the default method for documenting calibration events, usage logs, or maintenance history.
Applications
- Enzyme activity assays requiring precise incubation at 37 °C or other physiological temperatures
- Sample thawing of frozen reagents, sera, or cell suspensions under controlled thermal ramping
- Pre-heating solvents prior to HPLC mobile phase preparation or extraction protocols
- Constant-temperature conditioning of viscosity standards before rotational rheometry
- Supporting microbiological procedures such as agar liquefaction (45–50 °C) or bacterial enrichment (30–35 °C)
- Drying or concentrating small-volume aqueous samples via gentle evaporation under ambient airflow
- Calibration verification of liquid-in-glass thermometers or digital probe sensors using NIST-traceable reference standards
FAQ
What is the maximum recommended water level for optimal performance?
Fill to approximately 2 cm below the top rim of the stainless steel tank (≈3.5 L capacity) to prevent overflow during thermal expansion and ensure full immersion of heater elements.
Can this water bath be used with organic solvents like ethanol or acetone?
No. The unit is rated exclusively for aqueous solutions. Organic solvents pose fire hazards, degrade seals, and compromise temperature sensor accuracy due to differing thermal conductivity and vapor pressure characteristics.
Is calibration certificate included with purchase?
A factory calibration report (at 37 °C and 60 °C) is supplied; however, users must perform periodic in-house verification using an accredited reference thermometer per ISO/IEC 17025 Clause 6.5.
Does the unit support external temperature probe input for chamber monitoring?
No. The CD-WB-300 relies solely on its built-in PT100 sensor; no auxiliary probe port or analog output is available.
What maintenance is required to sustain long-term accuracy?
Monthly descaling with 10% citric acid solution is recommended for hard-water environments; annual inspection of heater insulation resistance (>1 MΩ) and thermal fuse integrity is advised per IEC 61010 maintenance guidelines.
