Holland Green Science Preseva Plus Freezer

The Preseva Plus operates from -10°C to -25°C with 0.1°C resolution control. Fresh material freezing is typically done at -18°C to -22°C, while longer-term extract storage benefits from the lower -25°C setting. The precise control ensures optimal preservation conditions for different sample types.

The 5 independent inner doors allow access to specific sections without exposing the entire chamber to ambient temperature. This minimizes cold air loss, reduces energy consumption, and maintains stable temperatures in unused sections. Each door corresponds to different shelf levels for organized sample access.

Regular maintenance includes cleaning the 304 stainless steel interior and adjustable shelves, checking door seals, and ensuring proper ventilation around the unit. The R290 refrigerant system requires minimal maintenance. Castor wheels allow easy movement for cleaning around the unit without disconnecting power.

The rechargeable backup battery maintains the digital display and alarm systems during power outages, logging critical information including temperature data and power failure duration. While the cooling system requires mains power, the excellent 80mm polyurethane insulation maintains low temperatures for extended periods during brief outages.

The Preseva Plus includes comprehensive protection systems:

• Temperature alarms for high/low temperature deviations
• Door open alarm prevents accidental temperature loss
• Power failure logging with backup battery operation
• Sensor failure protection with safe mode operation
• ETL-certified overtemperature alarm for safety compliance

The Preseva Plus offers 322L nominal capacity with 21 adjustable stainless steel shelves arranged across 5 levels. The interior dimensions are 508×455×1393mm, providing flexible storage configurations for various sample sizes and containers while maintaining optimal air circulation.

The unit includes a mechanical lock for secure sample storage and magnetic door seals that ensure optimal sealing while providing clear indication of proper closure. The digital controller can display access information, and the robust construction with powder-coated exterior provides additional security for valuable samples.

Yes, the Preseva Plus meets laboratory standards with ETL and CE certifications, detailed temperature logging, alarm documentation, and ≤4°C temperature uniformity throughout the chamber. The 0.1°C resolution monitoring and comprehensive alarm systems support compliance with quality assurance and regulatory requirements for sample storage.