The Darwin Chambers PH024 is a 24 cubic foot environmental test chamber engineered for pharmaceutical stability testing and demanding applications across pharmaceutical, medical, and research sectors. This unit delivers precise and consistent environmental conditions required for critical testing protocols while meeting rigorous FDA and ICH standards.
## Technical Specifications
**Chamber Dimensions & Construction**
• Capacity: 24 cu. ft.
• Exterior dimensions: 35.5″ W × 33.5″ D × 88.3″ H
• Front grill, shroud, and doors: 300 series stainless steel
• Exterior ends and back: Anodized aluminum
• Interior: NSF-approved white vinyl coated aluminum with 300 series stainless steel floor featuring coved corners
• Cabinet mounted on welded galvanized frame rail with 4″ diameter casters; front casters equipped with brakes
• Insulation: Foamed-in-place CFC-free polyurethane foam
**Doors**
• 300 series stainless steel exterior with white aluminum interior
• One-piece gaskets
• Lifetime guaranteed adjustable torsion type closure system with aluminum block supports
• Recessed 12″ handles with sheet metal inter-lock, foamed-in-place
• Barrel lock, keyed alike per door
**Shelving**
• Three adjustable vinyl-coated wire shelves per door
• Load capacity: 250 lbs. per shelf
• Full-height pilaster support with double oblong holes on 0.5″ centers
• Four chrome-plated stainless steel clips per shelf
**Lighting**
• Incandescent interior lighting with rocker switch activation
## Key Features
**Cooling System**
• Top-mounted thermoelectric cooling (Peltier-based, solid-state)
• Semi-redundant cooling capability
• Dehumidification via cooling surfaces at 25°C/60% RH and 30°C/65% RH
**Humidity Control**
• NIST traceable Vaisala humidity sensor with certificate
• Solid-state ultrasonic humidifier with ceramic/titanium disk
• Humidity range: 2 to 95% RH @ 22°C (ambient absolute humidity to 90% RH @ 42°C dewpoint)
• Control accuracy: ±0.2% RH at sensor
• Uniformity: ±2%
• Resolution: 0.1% RH
• Rotronic HC2A-S sensor (−50°C to 100°C / 0–100% RH; ±0.8% RH accuracy, ±0.1 K @ 23°C ±5 K)
**Temperature Control**
• Precise range control aligned with pharmaceutical stability protocols
## Typical Applications
Pharmaceutical stability testing, medical device environmental validation, and research sector climate simulation requiring FDA and ICH protocol compliance.
## Compatibility & Integration
NIST traceable instrumentation and standardized control interfaces ensure integration with regulated testing workflows and data acquisition systems.
