Truelab HWS-24 Stainless Steel Digital Water Bath

Overview

The Truelab HWS-24 is a precision-engineered benchtop water bath designed for stable, uniform thermal control of samples in laboratory environments. Operating on the principle of convective heat transfer via a thermostatically regulated water medium, it delivers consistent temperature maintenance across the entire bath chamber—critical for applications requiring thermal equilibration, enzymatic reactions, sample thawing, or incubation of temperature-sensitive reagents. Engineered for reliability in academic, industrial QC, and R&D settings, the HWS-24 features a fully welded SUS304 stainless steel inner tank that resists corrosion, facilitates cleaning, and ensures long-term dimensional stability under repeated thermal cycling. Its microprocessor-based PID temperature controller enables real-time feedback adjustment, minimizing overshoot and drift while maintaining ±0.5°C stability at setpoints across its full operating range (RT+5°C to 100°C). The unit complies with IEC 61010-1 safety standards for laboratory electrical equipment and is constructed to support GLP-aligned workflows through traceable temperature logging and programmable timing functions.

Key Features

• SUS304 stainless steel inner chamber with seamless welding—resistant to chemical exposure and thermal fatigue
• Digital PID temperature controller with 0.1°C resolution and adjustable ramp rate for precise thermal profiling
• Over-temperature protection circuit with audible and visual alarm—automatically cuts heating power if setpoint exceeds safe threshold by >3°C
• Programmable timer (1–9999 minutes) with auto-shutdown functionality to prevent unattended operation hazards
• Adjustable bath plate configuration: compatible with standard round-bottom flasks, beakers, and test tubes; optional perforated aluminum inserts available for custom vessel spacing
• Front-panel LED display with intuitive key navigation—no software installation required for basic operation
• Low-profile footprint (300 × 300 × 110 mm internal chamber) optimized for space-constrained fume hoods and shared lab benches

Sample Compatibility & Compliance

The HWS-24 accommodates a wide range of sample containers—from 10 mL centrifuge tubes to 1 L Erlenmeyer flasks—without compromising thermal homogeneity. Its uniform heating profile meets ASTM E2778-22 requirements for temperature uniformity testing in liquid baths used for calibration and stability studies. The unit is CE-marked and conforms to EN 61326-1 (EMC) and EN 61010-1 (safety) directives. While not certified for ISO/IEC 17025 accredited calibration labs out-of-the-box, it supports external validation using NIST-traceable PT100 probes and is routinely deployed in laboratories maintaining FDA 21 CFR Part 11–compliant data integrity protocols when paired with optional RS232/USB data logging modules.

Software & Data Management

The base HWS-24 operates as a standalone instrument with no embedded firmware updates or cloud connectivity. However, optional communication interfaces—including RS232 and USB-to-serial adapters—enable integration with third-party Lab Information Management Systems (LIMS) or custom Python/Matlab scripts for automated temperature logging. When configured with Truelab’s optional DataBridge module (sold separately), the bath supports timestamped CSV export of temperature readings at user-defined intervals (1 s to 60 s), complete with audit trail metadata (operator ID, session start/end, setpoint changes). All logged data adhere to ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available) when archived on secure network drives per institutional GLP/GMP documentation policies.

Applications

• Enzyme kinetics assays requiring strict thermal control during substrate incubation (e.g., amylase, protease, or kinase activity measurements)
• Pre-analytical sample preparation: DNA/RNA denaturation, antibody dilution warming, and blood serum equilibration prior to ELISA or flow cytometry
• Quality control testing per USP and guidelines for sterile compounding environments
• Accelerated stability studies per ICH Q1A(R2), including real-time and accelerated storage condition simulation (e.g., 40°C/75% RH equivalent via water-jacketed chamber coupling)
• Calibration of thermometers, thermocouples, and digital probes using fixed-point reference baths (with auxiliary glycerol or silicone oil media)
• Supporting ASTM D92 (Cleveland Open Cup Flash Point) and ASTM D93 (Pensky-Martens Closed Cup) test methods where controlled bath temperature is critical

FAQ

What is the maximum recommended operating temperature for continuous use?
The HWS-24 is rated for continuous operation up to 95°C. For extended durations (>8 hours), we recommend maintaining setpoints ≤90°C to optimize heater longevity and minimize evaporation-related refilling frequency.
Can the bath be used with non-aqueous media such as silicone oil or glycerol?
Yes—provided the fluid exhibits low volatility and thermal stability within the 0–100°C range. Users must verify compatibility with SUS304 and install appropriate splash guards. Oil use voids the standard warranty unless pre-approved by Truelab Technical Support.
Is the unit suitable for use in Class II biosafety cabinets?
It may be installed only if cabinet airflow dynamics are validated post-installation; the HWS-24 generates minimal heat dissipation (<1.5 kW) but requires ≥15 cm clearance from cabinet rear walls to avoid sensor interference.
Does the HWS-24 support remote monitoring via Ethernet or Wi-Fi?
No native Ethernet or Wi-Fi capability is included. Remote access requires integration via external industrial PLC gateways or third-party IoT edge devices compliant with Modbus RTU protocol.
How often should the temperature calibration be verified?
Per ISO/IEC 17025 and internal QA policies, verification with a calibrated reference thermometer (±0.1°C accuracy) is recommended before each critical experiment series or at minimum every 72 operational hours.