Temperature and Humidity Stability Chamber, 253 L, −5 to 70 °C
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The Master Science constant temperature humidity chamber provides a stable, controlled climate for long-term stability studies. Its 253 L chamber holds -5 to 70 °C and 15 to 95% RH, and the frost-free design avoids the drift caused by defrost cycles, so studies of drugs, food, packaging and electronic components can run for weeks without interruption.
Technical Specifications
- Capacity253 L
- Circulation ModeForced convection (balanced type)
- Internal Dimensions (W × D × H)640 × 460 × 860 mm
- External Dimensions (W × D × H)800 × 780 × 1570 mm
- Temperature Range-5 to 70 °C
- Temperature Resolution0.1 °C
- Temperature Fluctuation±0.2 °C
- Temperature Uniformity±0.5 °C
- Humidity Range15 to 95% RH
- Humidity Fluctuation±1% RH
- Operating Ambient Temperature5 to 30 °C
- Shelves3 (standard)
- Test HoleØ40 mm
- Control SystemProgrammable microcomputer fuzzy PID, 30 segments, 99 cycles
- DisplayWide screen showing temperature, humidity, fan speed and running time
- Alarm FunctionsTemperature, humidity and water level alarms (visual and audible)
- Data InterfaceUSB for printer or USB flash drive recording
- RefrigerationHot gas bypass energy regulation technology
- Power SupplyAC 220 V, 50 Hz
- Power Consumption2000 W
- Safety ProtectionCompressor overheating, over-current and over-pressure protection; condenser fan overheating protection; phase sequence and phase loss protection; leakage and short-circuit protection; overload protection; water shortage protection
Key Benefits
✓
Stable long-term tests
The frost-free design removes the temperature and humidity spikes caused by defrost cycles.
✓
Uniform conditions on every shelf
Diffusion-type air ducts and a three-speed fan keep temperature uniformity within ±0.5 °C across the 253 L chamber.
✓
Less manual work
Automatic water replenishment and recycling reduce routine water checks.
✓
Audit-ready records
USB output logs temperature and humidity data for stability reports.
✓
Sample protection
Over-temperature cut-off and audible and visual alarms stop the run before samples are affected.
Key Features
- ✓Frost-free humidity system
- ✓Three-speed circulating fan (high, medium, low)
- ✓Programmable fuzzy PID control with 30 segments and 99 cycles
- ✓Gradient and slope control of temperature rise and fall
- ✓Automatic water replenishment and recycling with water shortage protection
- ✓Tempered glass explosion-proof inner door and 4-point locking outer door
- ✓USB data recording to printer or flash drive
Applications
Pharmaceutical stability testing
Food quality and shelf-life studies
Electronic component reliability testing
Quality control laboratories
Research institutions and universities
Standard Accessories Included
- Main chamber unit
- 3 adjustable SUS304 stainless steel shelves
- Power cord
- Operation manual
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