LabCompanion DHG Series Multi-Deck Temperature and Humidity Controlled Chamber

Overview

The LabCompanion DHG Series Multi-Deck Temperature and Humidity Controlled Chamber is an engineered solution for laboratories requiring high-density environmental simulation under strict spatial constraints. Designed on the principle of vertical stacking architecture, this chamber integrates two or three independently controlled test compartments within a single structural envelope—enabling concurrent testing of multiple sample batches without cross-contamination or thermal/hygrometric interference. Each deck operates with full autonomy in temperature and humidity setpoints, leveraging precision PID control algorithms and calibrated platinum resistance thermometers (PT100) and capacitive RH sensors. The system adheres to fundamental principles of psychrometric engineering and convective heat/mass transfer, ensuring stable equilibrium conditions across the working volume. Its compact footprint—optimized for floor space efficiency—makes it particularly suitable for QC labs processing small-form-factor electronics (e.g., ICs, PCBAs, mobile components), pharmaceutical stability samples, or polymer specimens where throughput scalability is constrained by facility layout.

Key Features

• Modular multi-deck configuration: Selectable 2-deck (DHG-2C) or 3-deck (DHG-3C) layouts with independent microprocessor-based controllers per chamber
• High-efficiency refrigeration architecture: Single-stage sealed compressors for standard temperature ranges; dual-stage compressors for extended low-temperature operation (down to −40°C)
• Uniformity-optimized airflow design: Centrifugal fans with adjustable speed control ensure laminar, non-turbulent circulation—validated to meet ±0.5°C temperature uniformity and ±3% RH uniformity (20–85% RH range)
• Dual-path humidification system: Stainless steel surface-evaporation heater with integrated water level monitoring and auto-refill capability, supported by closed-loop recirculating filtration
• Structural integrity and corrosion resistance: Fully welded SUS#304 stainless steel interior and exterior panels; ≥100 mm composite insulation (rock wool + rigid PU foam) minimizing thermal bridging
• Comprehensive safety redundancy: Independent over-temperature cutoffs per deck, compressor discharge temperature monitoring, ground-fault circuit interruption (GFCI), and real-time water shortage detection with audible/visual alarms

Sample Compatibility & Compliance

The DHG Series accommodates diverse sample geometries and material classes—including electronic assemblies, active pharmaceutical ingredients (APIs), medical device packaging, elastomers, and thin-film coatings—without compromising environmental fidelity. Its standardized 50 mm test port supports external sensor feedthroughs, while the double-glazed vacuum window enables visual monitoring without thermal leakage. From a regulatory standpoint, the chamber’s architecture aligns with core requirements of ISO 17025 (for laboratory competence), ICH Q1A–Q1E (stability testing guidelines), and ASTM E145–22 (Standard Specification for Gravity-Convection and Forced-Ventilation Ovens). Though not pre-certified to FDA 21 CFR Part 11, its optional Ethernet-enabled controller supports audit-trail-capable data logging compliant with GLP/GMP documentation workflows when paired with validated software.

Software & Data Management

Each DHG unit ships with an embedded 7-inch TFT touchscreen HMI running proprietary firmware supporting up to 100 programmable test profiles with segment-based ramp/soak logic. Real-time data—including chamber temperature, relative humidity, compressor status, and fan speed—is logged at user-defined intervals (1 s to 60 min resolution) and exportable via USB or SD card in CSV format. Optional RS485 Modbus RTU integration allows centralized supervision through SCADA platforms or LIMS interfaces. For validation-critical environments, LabCompanion provides IQ/OQ protocol templates aligned with Annex 15 (EU GMP) and ASTM E2500–22, covering sensor calibration traceability, alarm response verification, and uniformity mapping procedures.

Applications

• Accelerated stability testing of pharmaceutical products per ICH Q1 guidelines
• Temperature-humidity cycling of printed circuit boards and semiconductor packages
• Material aging studies for automotive interior polymers and adhesives
• Pre-conditioning of moisture-sensitive components prior to solder reflow
• Environmental stress screening (ESS) of microelectromechanical systems (MEMS)
• Calibration reference chamber for hygrometer and thermometer verification labs

FAQ

Can the upper and lower decks operate at different temperature and humidity setpoints simultaneously?
Yes. Each deck features an independent PID controller, sensor suite, and actuation system—enabling fully asynchronous operation across all specified ranges.
Is the DHG Series suitable for long-term continuous operation (e.g., 24/7 stability studies)?
Yes. Designed for unattended operation up to 1000 hours, it includes redundant safety circuits, predictive compressor diagnostics, and self-monitoring water management.
What validation documentation is available for GxP-regulated environments?
LabCompanion supplies customizable IQ/OQ templates, factory calibration certificates (NIST-traceable), and sensor drift verification reports—supporting internal validation protocols per ALCOA+ principles.
How is humidity accuracy maintained at low RH levels (e.g., below 30%)?
The system employs dynamic dew-point referencing and adaptive heating modulation of the evaporation surface, minimizing hysteresis and improving repeatability at sub-30% RH setpoints.
Does the chamber support remote monitoring via network connection?
With the optional Ethernet module, users can access live parameters, initiate/abort profiles, and download logs remotely using standard HTTP or Modbus TCP protocols.