WIGGENS WHT-750 Temperature and Humidity Controlled Chamber

Overview

The WIGGENS WHT-750 Temperature and Humidity Controlled Chamber is an upright, precision-engineered environmental test system designed for long-term stability and reproducible conditioning of samples under tightly regulated thermal and hygrometric conditions. Based on a dual-loop PID control architecture, the chamber integrates independent refrigeration and heating circuits with a dedicated humidity generation and condensation management system. Its air jacket design—where conditioned air circulates in a sealed annular space surrounding the inner chamber—enables rapid thermal response and minimizes internal temperature gradients. Forced-air convection ensures uniform distribution of both temperature and relative humidity across the full 750 L working volume, meeting critical requirements for material aging, stability testing, and accelerated shelf-life studies per ISO 17025-compliant laboratory practices.

Key Features

• Stainless steel (AISI 304) interior chamber with seamless welds and electropolished finish for corrosion resistance and ease of cleaning—essential for pharmaceutical, food, and electronics testing environments.
• Air-jacketed thermal management system with independent compressor-based cooling and PTC heating elements, enabling stable operation from +4 °C to +60 °C with ±0.1 °C temperature fluctuation and <±1.0 °C spatial uniformity.
• Dual-stage humidity control using evaporation and re-condensation technology, delivering 10–85 %RH range within the 25–55 °C operational envelope, with ±1 %RH setpoint resolution and <±3 %RH deviation under steady-state conditions.
• Integrated safety architecture including overtemperature cutoff, overcurrent protection, door-open interlock (disabling heaters and fans upon opening), and audible/visual alarm triggers for temperature/humidity excursions.
• Autostart functionality with configurable behavior post-power interruption—supports either automatic resumption of prior program or safe shutdown—critical for unattended overnight or multi-day stability protocols.
• RS232 and RS485 serial interfaces compliant with Modbus RTU protocol, enabling integration into centralized lab automation systems and supporting remote monitoring, parameter logging, and audit-trail generation.

Sample Compatibility & Compliance

The WHT-750 accommodates diverse sample formats—including petri dishes, stability trays, packaged components, and small assemblies—via up to nine adjustable stainless steel shelves (standard configuration: two shelves, 30 kg load capacity each). Its non-outgassing insulation and absence of volatile organic compounds (VOCs) in construction materials comply with ICH Q1A(R2) and USP requirements for pharmaceutical stability chambers. The unit meets EN 61000-6-2 (immunity) and EN 61000-6-3 (emissions) standards, and its control firmware supports time-stamped event logging suitable for GLP and GMP environments requiring 21 CFR Part 11–compliant electronic records when paired with validated software.

Software & Data Management

While the WHT-750 operates autonomously via its front-panel touchscreen interface, its RS232/RS485 ports allow bidirectional communication with third-party data acquisition platforms (e.g., LabVIEW, SCADA, or LIMS). Users may configure programmable cycles—including ramp-soak-hold profiles, timed start/stop sequences, and conditional alarms—with up to 99 segments per program. All operational parameters, setpoints, deviations, and alarm events are timestamped and exportable as CSV files. When integrated with WIGGENS’ optional PC-based control suite (sold separately), the system supports real-time graphing, trend analysis, and automated report generation aligned with ISO/IEC 17025 documentation workflows.

Applications

The WHT-750 serves as a core platform for controlled-environment testing across multiple regulated and industrial sectors. In pharmaceutical development, it supports ICH-guided long-term and accelerated stability studies (e.g., 25 °C/60 %RH, 30 °C/65 %RH, 40 °C/75 %RH). In materials science, it enables evaluation of polymer degradation, coating adhesion, and composite dimensional stability under cyclic humidity exposure. Electronics manufacturers utilize it for preconditioning PCBs and connectors prior to thermal shock testing; food and packaging labs apply it to assess barrier performance and microbial growth kinetics. Its robust construction and precise environmental fidelity also make it suitable for calibration verification of hygrometers and thermometers per ISO 554 and ASTM E104.

FAQ

What is the maximum allowable ambient temperature for installation?
The WHT-750 must be operated in environments between 10 °C and 35 °C, with adequate ventilation and minimum clearance of 100 mm around all sides and rear for heat dissipation.
Can the chamber maintain humidity below 25 °C?
Humidity control is specified only within the 25–55 °C range; at temperatures below 25 °C, condensation risk increases and RH accuracy cannot be guaranteed per manufacturer specifications.
Is the stainless steel interior electropolished or passivated?
The 304 stainless steel chamber is electropolished to enhance surface smoothness, reduce particle retention, and improve cleanability—particularly important for low-bioburden applications.
Does the unit include validation documentation?
Factory-installed IQ/OQ documentation is available upon request; PQ execution requires user-defined protocols and calibrated external sensors per ISO 14644 and EU Annex 15 guidelines.
Are casters included, and are they lockable?
Yes—the unit ships with four heavy-duty, swivel casters equipped with individual mechanical brakes for secure positioning and mobility during facility reconfiguration.