ZiQi HH-W600 Digital Triple-Function Constant-Temperature Water Bath

Overview

The ZiQi HH-W600 Digital Triple-Function Constant-Temperature Water Bath is an entry-level, benchtop thermal immersion system engineered for reliable, repeatable heating across a broad spectrum of routine laboratory applications. Operating on resistive heating principles with direct-contact thermal transfer via water medium, the HH-W600 delivers stable temperature maintenance without forced circulation—making it suitable for static immersion protocols where convective mixing is unnecessary or undesirable. Its design integrates three primary operational modes into a single platform: water bath heating (for sample warming and reaction incubation), temperature-controlled water tank operation (for calibration reference or thermal equilibration), and boiling disinfection (at 100 °C for sterilization of glassware, instruments, and non-critical lab tools). The unit complies with fundamental electrical safety standards for Class I laboratory equipment (IEC 61010-1) and meets structural requirements for indoor use under ambient conditions (20–30 °C, <80% RH non-condensing).

Key Features

• Fully stainless-steel interior chamber (AISI 304 grade) ensures long-term corrosion resistance against aqueous solutions, mild acids, and alkaline reagents commonly used in chemical and biological workflows.
• Electrostatically coated cold-rolled steel outer housing provides mechanical durability and surface integrity under daily handling and cleaning cycles.
• Digital PID temperature controller with LED display enables precise setpoint entry and real-time monitoring at 0.1 °C resolution; auto-tuning algorithm minimizes overshoot during ramp-up phases.
• Over-temperature cut-off protection (mechanical backup thermostat) activates at 105 °C to prevent dry-run damage and mitigate fire risk in case of sensor failure or user error.
• Front-panel accessible water level indicator and drain valve simplify maintenance, refilling, and bath fluid replacement—critical for preventing mineral buildup and ensuring consistent thermal performance over time.
• Fixed-height immersion geometry supports standardized vessel placement (e.g., 100–1000 mL beakers, test tube racks, and Petri dish stacks) without requiring custom fixtures or clamping accessories.

Sample Compatibility & Compliance

The HH-W600 accommodates standard laboratory glassware up to 600 mm in length, including round-bottom flasks (up to 2 L), graduated cylinders, culture bottles, and stainless-steel instrument trays. It is not intended for volatile organic solvent immersion or pressurized operation. For regulatory alignment, the device supports GLP-compliant documentation when paired with external calibrated thermometers (e.g., NIST-traceable Pt100 probes) for periodic verification. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, its deterministic thermal behavior and manual logging interface enable integration into audit-ready SOPs for non-GMP environments such as academic research labs, teaching facilities, and QC screening workflows.

Software & Data Management

This model operates as a standalone analog-digital hybrid instrument with no embedded software, network interface, or data export capability. Temperature setpoints and current readings are displayed locally via a 4-digit LED screen; all operational logs must be recorded manually. Users requiring electronic data capture may integrate external USB or Bluetooth-enabled data loggers (e.g., Omega OM-DAQPRO-5300 series) using the optional PT100 sensor port (available upon request). No firmware updates or driver installation is required—ensuring zero compatibility risk with legacy Windows, macOS, or Linux workstations.

Applications

• Controlled-temperature incubation of enzyme assays, antigen-antibody reactions, and DNA denaturation protocols within the 37–95 °C range.
• Pre-heating solvents prior to chromatographic injection or vacuum distillation setups.
• Moist-heat sterilization of reusable lab tools (forceps, spatulas, pipette tips) via sustained 100 °C boiling for ≥10 minutes—validated per WHO-recommended low-resource disinfection guidelines.
• Calibration of liquid-in-glass thermometers and digital probe sensors using fixed-point water baths (e.g., triple-point cell referencing).
• Accelerated aging studies for polymer films or hydrogel matrices under defined thermal stress conditions.
• Supporting ASTM D1505 (density gradient column) and ISO 1183-1 (plastics density determination) methodologies where constant bath temperature is prerequisite.

FAQ

Does the HH-W600 support refrigeration or cooling functionality?

No. This is a heating-only bath with no integrated Peltier or compressor-based cooling system.
Can it be used with oil or other heat-transfer fluids?

Not recommended. The stainless-steel chamber and heater assembly are optimized for water; alternative media may degrade seals, accelerate oxidation, or impair temperature uniformity.
Is external circulation possible via retrofitting?

No. The unit lacks inlet/outlet ports, pump mounting provisions, or pressure-rated plumbing—modifications void warranty and compromise electrical safety certification.
What is the typical warm-up time from 25 °C to 100 °C?

Approximately 45–60 minutes under standard load (full water volume, ambient humidity ≤60%).
How often should the water bath be cleaned and descaled?

Weekly cleaning with diluted acetic acid (5%) is advised in hard-water regions; monthly inspection of heater element surface for scale accumulation is essential to maintain thermal efficiency and longevity.