Arctico DW-25W198 -25°C Laboratory Low-Temperature Storage Freezer

Overview

The Arctico DW-25W198 is a purpose-engineered horizontal low-temperature storage freezer designed for reliable, energy-efficient preservation of temperature-sensitive biological materials—including vaccines, reagents, cell cultures, and diagnostic specimens—within the clinically critical range of –10 °C to –25 °C. Unlike ultra-low-temperature (ULT) freezers operating at –80 °C, this unit occupies a distinct operational tier optimized for stability, accessibility, and reduced energy demand in routine laboratory and clinical storage workflows. Its direct-cooling architecture employs a hermetically sealed compressor and strategically distributed evaporator surface on the inner chamber walls—engineered to minimize thermal lag and accelerate temperature recovery after door openings. The microprocessor-based controller ensures precise setpoint adherence with ±1.5 °C uniformity across the working volume under standard ambient conditions (18–28 °C, climate class N), supporting compliance with WHO cold chain guidelines for vaccine storage and ISO 15190:2020 requirements for laboratory safety infrastructure.

Key Features

• Microprocessor-controlled electronic thermostat with LCD digital display, enabling real-time monitoring and 1 °C incremental setpoint adjustment.
• Dual-mode audible and visual alarm system triggered by high-temperature excursion (>–10 °C), mains power interruption, or NTC thermistor failure—ensuring immediate operator awareness during critical deviations.
• Integrated mechanical door lock prevents unauthorized access, fulfilling basic security requirements for controlled substances and vaccine inventory management per national immunization program protocols.
• CFC-free refrigerant (R134a or equivalent) and polyurethane insulation align with global environmental standards including Montreal Protocol phase-out schedules and EU F-Gas Regulation Annex I criteria.
• Robust construction featuring embossed aluminum interior panels for corrosion resistance and ease of decontamination, combined with pre-painted steel exterior for durability in shared lab environments.
• Startup delay protection safeguards compressor longevity by enforcing a minimum 3-minute interval between power cycling events—a feature essential for facilities with unstable grid supply.

Sample Compatibility & Compliance

The DW-25W198 accommodates standard laboratory containers—including cryovials (2 mL–50 mL), serum bottles, multi-well plates, and vaccine carrier trays—within its 198 L usable volume. Its uniform temperature distribution supports long-term integrity of freeze-dried proteins, monoclonal antibodies, and RNA extraction kits requiring stable sub-zero storage without deep-frozen brittleness. The unit carries CCC certification (China Compulsory Certification) and holds a valid Class II Medical Device Registration Certificate (National Medical Products Administration, China), confirming conformity with YY 0086–2019 “Low-Temperature Refrigerators for Medical Use.” While not validated to FDA 21 CFR Part 11 or ISO/IEC 17025, its documented temperature stability, alarm traceability, and mechanical lock mechanism provide foundational support for GLP-aligned recordkeeping when paired with external data loggers.

Software & Data Management

This model operates as a standalone hardware platform with no embedded network connectivity or proprietary software suite. All operational parameters—including current temperature, setpoint, alarm status, and power-on duration—are displayed locally via the front-panel LCD. For audit-trail generation, users must integrate third-party calibrated temperature monitoring systems (e.g., DicksonOne, Sensitech TempTale®) through the optional external probe port (not pre-installed but mechanically compatible with standard 4–20 mA or 0–5 V analog inputs). Password protection on the display interface restricts unauthorized modification of temperature settings, contributing to procedural consistency in regulated environments.

Applications

• Vaccine storage in primary healthcare centers and district immunization programs where –20 °C stability meets WHO PQS specifications for lyophilized and liquid formulations.
• Short-to-medium term storage of ELISA reagents, enzyme conjugates, and antibody stocks requiring avoidance of repeated freeze-thaw cycles.
• Backup cold storage for PCR master mixes, restriction enzymes, and other thermolabile molecular biology reagents.
• Field-deployable cold chain nodes in mobile clinics or disaster-response units due to compact footprint (0.5 m² floor space) and low power draw (75 W average).
• Supporting ISO 13485-certified medical device manufacturing processes for component cold storage prior to assembly and sterilization.

FAQ

What is the recommended ambient operating environment for this freezer?
It is rated for climate class N (18–32 °C ambient, ≤60% RH), with optimal performance observed at 20–25 °C. Operation above 32 °C may reduce cooling capacity and increase compressor duty cycle.
Does the unit support remote monitoring or Ethernet connectivity?
No. The DW-25W198 lacks built-in communication interfaces. Integration with building management systems requires external data loggers with relay outputs.
Is manual defrosting required, and how frequently?
Yes. Frost accumulation should be removed whenever ice thickness exceeds 5 mm on evaporator surfaces—typically every 3–6 months depending on door-open frequency and ambient humidity.
Can external temperature probes be connected for validation purposes?
While no factory-installed port exists, the cabinet’s rear wall includes a standardized 8 mm diameter grommeted opening suitable for retrofitting calibrated PT100 or thermistor probes used in IQ/OQ protocols.
What documentation accompanies the unit for regulatory submissions?
Shipment includes CCC certificate, Medical Device Registration Certificate, electrical safety test report (GB 4706.13), and user manual with maintenance schedule—all provided in English and Chinese. Factory calibration certificates are available upon request at additional cost.