Meiling YW110A -25°C Ultra-Low Temperature Freezer (Truelab Distribution)

Overview

The Meiling YW110A is a horizontally configured, energy-efficient low-temperature freezer engineered for stable, long-term storage of biological samples, reagents, vaccines, and temperature-sensitive pharmaceuticals at controlled operating temperatures between –10°C and –25°C. Unlike ultra-low temperature (ULT) freezers operating at –80°C, the YW110A occupies a critical niche in laboratory cold chain infrastructure—providing reliable cryopreservation for materials that do not require deep freezing but demand tighter thermal stability than standard refrigerators (2–8°C) or general-purpose freezers (–20°C). Its direct-cooling refrigeration architecture ensures uniform internal temperature distribution with minimal gradient deviation (< ±1.5°C across all zones under steady-state conditions), minimizing thermal stress on stored specimens. Designed for continuous 24/7 operation in GLP-compliant environments, the unit meets fundamental requirements for sample integrity in clinical laboratories, biobanks, and pharmaceutical QA/QC facilities.

Key Features

• Precision microprocessor-based temperature controller with imported components, enabling user-defined setpoint adjustment from –10°C to –25°C in 0.1°C increments
• Digital LED display with real-time temperature readout and status indicators for compressor activity, door open alerts, and system faults
• High-efficiency hermetic compressor (international brand) coupled with optimized refrigerant circuitry for rapid pull-down (≤ 3.5 hours from 25°C ambient to –25°C setpoint)
• Enhanced insulation using high-density polyurethane foam (≥ 80 mm thickness in side/wall panels; ≥ 100 mm in lid), achieving U-value ≤ 0.25 W/m²·K
• Keyboard lock function with optional password protection to prevent unauthorized parameter modification
• Compressor protection logic including programmable start-delay (≥ 3 min) and minimum off-cycle intervals (≥ 5 min) to reduce mechanical wear and extend service life
• Interior constructed from corrosion-resistant stainless steel (SUS304) with rounded corners for ease of cleaning and compliance with ISO 14644-1 Class 8 cleanroom-compatible maintenance protocols
• Standard wire mesh baskets (3 per tier) with reinforced suspension rails; optional EPS uninterruptible power supply module available for short-duration backup during grid fluctuations

Sample Compatibility & Compliance

The YW110A supports storage of a broad spectrum of temperature-sensitive biospecimens—including whole blood units, serum/plasma aliquots, microbial cultures, enzyme solutions, and lyophilized standards—within its validated operational envelope. It conforms to key international performance benchmarks relevant to laboratory cold storage: IEC 61000-4 (EMC immunity), IEC 60335-1 (household and similar electrical appliance safety), and GB/T 8059-2016 (Chinese national standard for household-type refrigerating appliances). While not certified to UL 471 or NSF/ANSI 456 (which apply primarily to medical refrigerators), its design aligns with core principles of FDA 21 CFR Part 11 data integrity expectations when integrated with external logging systems. Temperature mapping validation reports (per ISO 14155 Annex A) can be generated using third-party calibrated thermistors placed at nine standardized locations (corners, center, mid-height).

Software & Data Management

The YW110A operates as a standalone hardware platform without embedded network connectivity or proprietary software. However, it is fully compatible with industry-standard environmental monitoring systems (EMS) via analog voltage output (0–5 V DC proportional to internal temperature) and dry-contact alarm relays (NO/NC). When interfaced with compliant EMS platforms—such as DicksonOne, SensiLog, or TempTale—users achieve full audit trail capability, electronic signature support, and automated report generation aligned with 21 CFR Part 11 Annex 11 and EU GMP Annex 15 requirements. Optional RS-485 Modbus RTU interface kits enable integration into building management systems (BMS) for centralized HVAC coordination.

Applications

• Short-to-medium term storage of clinical specimens prior to nucleic acid extraction or histopathological processing
• Stabilization of diagnostic reagents, monoclonal antibodies, and conjugated enzymes requiring –20°C to –25°C conditions
• Backup cold storage for vaccine distribution centers operating under WHO PQS cold chain guidelines
• Supporting ISO/IEC 17025-accredited testing labs maintaining reference material inventories
• Pharmaceutical stability studies conducted per ICH Q5C where intermediate freeze-thaw cycles occur within this temperature band
• Field-deployable cold storage for mobile health units in resource-limited settings with stable grid access

FAQ

What is the recommended ambient temperature range for optimal YW110A operation?
The unit is rated for installation in rooms maintained between 10°C and 32°C with relative humidity ≤ 80% non-condensing. Performance degrades above 32°C ambient due to reduced condenser efficiency.
Does the YW110A support temperature alarms with remote notification?
Yes—via optional relay expansion modules connected to facility-wide alarm networks or cloud-based EMS gateways supporting SMS/email escalation protocols.
Is calibration certificate included with shipment?
No factory-issued NIST-traceable calibration certificate is provided by default; however, pre-shipment verification against reference thermometers (±0.3°C accuracy) is performed and documented in the delivery checklist.
Can the interior baskets be replaced with custom-configured racks?
Yes—the standard SUS304 sliding rail system accepts third-party rack adapters designed for 2 mL, 5 mL, or 15 mL tube formats, subject to maximum load limit of 35 kg per shelf.
What maintenance schedule is advised for compressor longevity?
Biannual inspection of condenser coil cleanliness and annual verification of refrigerant charge pressure (R134a nominal: 0.12–0.15 MPa at 25°C ambient) are recommended per manufacturer technical bulletin ME-YW-2023-04.