DHS HW-Mixer Orbital Shaking Water Bath Incubator

Overview

The DHS HW-Mixer Orbital Shaking Water Bath Incubator is an engineered platform designed for precise temperature-controlled agitation of liquid samples in life science, biopharmaceutical, and quality control laboratories. It operates on the principle of orbital shaking—generating a consistent, circular motion (with a maximum diameter of 50 mm) within a thermally stabilized water bath environment—to ensure uniform mixing, suspension resuspension, or gentle cell culture agitation. Unlike open-bath or air-jacketed systems, the HW-Mixer integrates a fully sealed internal recirculation loop, eliminating evaporative loss and minimizing thermal gradients across the bath volume. Its heating-only architecture (no integrated refrigeration) makes it ideal for applications requiring stable temperatures from ambient +5 °C up to 99.9 °C—such as enzyme reactions, bacterial growth studies, solubility testing, and reagent equilibration—while maintaining ISO-compliant thermal stability (±0.2 °C typical at 37 °C under load).

Key Features

• Orbital shaking mechanism with adjustable speed range (typically 20–300 rpm), delivering reproducible motion profiles optimized for suspension homogeneity and low-shear sample integrity.
• Large-volume stainless steel water bath chamber (standard capacity: ≥15 L) constructed entirely from electropolished 316L stainless steel—resistant to corrosion, compatible with sterilization protocols (e.g., VHP or ethanol wipe-down), and certified for use in controlled environments including ISO Class 5 cleanrooms.
• Industrial-grade capacitive touchscreen interface with intuitive GUI, supporting multi-step programmable protocols, real-time temperature/shaking status monitoring, and password-protected parameter locking for GLP/GMP compliance.
• Integrated leveling feet and optional casters enable both stable benchtop anchoring and flexible repositioning—critical for modular lab layouts or shared core facility deployment.
• Modular sample tray design accommodates standard and custom inserts: universal clamping plates for Erlenmeyer flasks (50–2000 mL), microtiter plate holders (96-/384-well), tube racks (1.5–50 mL), and user-defined fixtures for irregular containers.

Sample Compatibility & Compliance

The HW-Mixer supports a broad range of vessel formats without compromising thermal uniformity or mechanical consistency. Its deep bath geometry and wide orbital radius accommodate tall culture vessels while maintaining ±0.3 °C spatial uniformity across the working zone (per ASTM E1112-22 methodology). All wetted surfaces comply with USP material safety requirements for pharmaceutical contact. The system meets IEC 61010-1:2010 safety standards for laboratory equipment and includes over-temperature cutoff, dry-run protection, and ground-fault circuit interruption. While not inherently 21 CFR Part 11 compliant, audit-trail-capable firmware versions are available upon request for regulated QC environments.

Software & Data Management

The embedded controller logs timestamped temperature setpoints, actual bath temperature, shaking speed, and runtime duration into non-volatile memory (retention ≥10 years). Optional RS-485 or Ethernet connectivity enables integration with LabVantage, STARLIMS, or custom SCADA systems via Modbus RTU/TCP. Data export is supported in CSV format with ISO 8601 timestamps, facilitating traceability during FDA inspections or internal quality audits. Remote monitoring and alarm notification (via email/SNMP trap) can be configured through optional gateway modules.

Applications

• Microbial culture expansion and maintenance (E. coli, yeast, mammalian suspension cells)
• Antibody solubilization and buffer exchange in protein formulation development
• Dissolution testing per USP for solid oral dosage forms
• Enzymatic digestion and DNA/RNA hybridization kinetics studies
• Stability-indicating assays requiring simultaneous thermal control and agitation
• Pre-analytical sample preparation for HPLC, LC-MS, and ELISA workflows

FAQ

Does the HW-Mixer support cooling functionality?
No—the HW-Mixer is a heating-only system. For sub-ambient temperature control, external chiller integration via auxiliary ports is required.
Can the unit be validated for GxP environments?
Yes. IQ/OQ documentation packages—including calibration certificates traceable to NIST standards—are available. Installation qualification templates and performance verification protocols align with ASTM E2500 and EU Annex 15 guidelines.
Is the water bath depth adjustable?
The bath depth is fixed, but the sample tray height is configurable using precision-machined spacers to optimize immersion depth for different vessel types.
What maintenance is required?
Routine maintenance includes quarterly descaling (using citric acid solution), annual verification of temperature sensor drift, and biannual inspection of circulation pump seals.
Are third-party accessories supported?
Yes—custom brackets, flask clamps, and microplate adapters conforming to ANSI/SLAS dimensional standards may be sourced independently and installed without voiding warranty.